Relevant bibliographies by topics / Arachnoïde

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
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  5. Conference papers

Academic literature on the topic 'Arachnoïde'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Arachnoïde"

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de Oliveira Filho, Ítalo Teles, Paulo Cesar Romero, Emílio Afonso França Fontoura, Saul Dalla de Oliveira, and Ricardo Vieira Botelho. "Symptomatic foramen of Magendie arachnoid cyst in an elderly patient: The second case report in the literature." Surgical Neurology International 10 (September 27, 2019): 189. http://dx.doi.org/10.25259/sni_380_2019.

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Background: Arachnoid cysts are benign extra-axial lesions corresponding to 1% of intracranial expansive lesions. They are usually incidental findings in asymptomatic patients. Most cases are congenital, and when symptomatic are diagnosed in childhood or adolescence. Symptomatic arachnoids cyst in elderly patients is very rare. This report documents the second case in the literature of a symptomatic elderly patient with an arachnoid cyst located in the foramen of Magendie. Case Description: A 68-year-old male had weakness in the lower limbs, imbalance, and gait disturbance for 3 years, associated with frequent falls. The patient complained of paresthesia in the upper right limb and right hemiface. An magnetic resonance imaging showed a massive cystic lesion in the posterior fossa in the foramen of Magendie. A median suboccipital craniectomy was performed, and the cyst was removed. Conclusion: This case report adds to the literature the second case of a patient with a symptomatic arachnoid cyst in the posterior fossa successfully treated by surgery.
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FRYDAY, Alan M., Damien ERTZ, and Per Magnus JØRGENSEN. "Insights into the genus Austrella (Pannariaceae, Peltigerales), including a new species from the Falkland Islands." Lichenologist 49, no. 1 (January 2017): 57–65. http://dx.doi.org/10.1017/s0024282916000621.

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AbstractThe new species Austrella isidioidea, which is unique in the genus in having isidioid structures on the thallus lobe ends as well as apothecia lacking a thalline margin, is described from the Falkland Islands. A collection with an identical mtSSU rDNA sequence to A. arachnoidea but with significant morphological differences (viz. a variable apothecial margin ranging from an arachnoid hyphal weft to a corticated regular margin) is reported from Îles Kerguelen. The phylogenetic and biogeographical implications of these new records are discussed.
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Verma, Siddharth. "Spinal Extradural Arachnoid cyst: Review of Literature." Journal of Surgical Case Reports and Images 3, no. 2 (February 27, 2020): 01–03. http://dx.doi.org/10.31579/2690-1897/020.

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Spinal arachnoid cysts are mostly intradural. Spinal extradural arachnoid cyst (SEAC) is very rare condition accounting for only 1% cases of spinal tumors. [1,2,3] SEAC is mostly found in males in their second to fifth decades. Most common location of SEAC is thoracic spine
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Haybaeck, Johannes, Rene Silye, and Dov Soffer. "Dural arachnoid granulations and “giant” arachnoid granulations." Surgical and Radiologic Anatomy 30, no. 5 (April 8, 2008): 417–21. http://dx.doi.org/10.1007/s00276-008-0345-2.

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Deutsch, Harel. "Thoracic arachnoid cyst resection." Neurosurgical Focus 37, v2supplement (September 2014): Video4. http://dx.doi.org/10.3171/2014.v3.focus14262.

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Arachnoid cysts in the spinal cord may be asymptomatic. In some cases arachnoid cysts may exert mass effect on the thoracic spinal cord and lead to pain and myelopathy symptoms. Arachnoid cysts may be difficult to visualize on an MRI scan because the thin walled arachnoid may not be visible. Focal displacement of the thoracic spinal cord and effacement of the spinal cord with apparent widening of the cerebrospinal fluid space is seen. This video demonstrates surgical techniques to remove a dorsal arachnoid cyst causing spinal cord compression. The surgery involves a thoracic laminectomy. The dura is opened sharply with care taken not to open the arachnoid so that the cyst can be well visualized. The thickened arachnoid walls of the cyst are removed to alleviate the compression caused by the arachnoid cyst.The video can be found here: http://youtu.be/pgUrl9xvsD0.
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Hande, Ashok Mahade, and Anil Pandurang Karapurkar. "Hemorrhage into an intradiploic arachnoid cyst." Journal of Neurosurgery 75, no. 6 (December 1991): 969–71. http://dx.doi.org/10.3171/jns.1991.75.6.0969.

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✓ Intracranial arachnoid cysts are relatively rare; it is believed that they account for only 1% of all intracranial space-occupying lesions. When they occur in the intracranial cavity, they usually develop in relation to an arachnoid cistern as a pocket of cerebrospinal fluid within two layers of arachnoid membrane. Five cases of intradiploic arachnoid cysts have been reported, but an arachnoid cyst presenting as an extradural mass has not been described before. The authors present an unusual case of hemorrhage into a massive intracranial extradural arachnoid cyst with no intradural communication.
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Sivakumaran, Rajitha. "The relationship between age and arachnoid depressions in humans." COMPASS 2, no. 1 (October 30, 2017): 10–23. http://dx.doi.org/10.29173/comp46.

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The human skeletal collection housed in the Department of Anthropolog y at the University of Alberta was used to determine the relationship between age and the occurrence of arachnoid depressions on the endocranial aspect of the skull. There were significant differences between the total number of arachnoid depressions found on the vaults of juveniles, adolescents, and adults. When mean ages were compared with total number of arachnoid depressions on the vault, a significant relationship did not emerge. When age was grouped into nine-year intervals to counteract the effect of idiosyncratic variation, the mean number of depressions increased with age, as did the maximum number of arachnoid depressions. The frequency of older individuals without arachnoid depressions waslow. Older individuals were more likely to have larger and deeper arachnoid depressions. There were no sex-based differences in the expression of arachnoid depressions. There were no significant differences between archaeological, historic, and modern samples or between pathological and healthy individuals. Although this study verifies the association between arachnoid depressions and senescence, the presence of arachnoid depressions is highly variable andcannot be used reliably as an indicator of chronological age or even as a sign of senescence.
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Benek, Huseyin Berk, and Emrah Akcay. "Concomitant chronic subdural hematomas and arachnoid cysts in young adults." F1000Research 10 (May 26, 2021): 421. http://dx.doi.org/10.12688/f1000research.53210.1.

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Objective: This study aimed to evaluate the correlation between arachnoid cysts and chronic subdural hematomas in young adults. Methods: This retrospective study evaluated ten patients having concomitant chronic subdural hematomas and arachnoid cysts. Patients were evaluated with the data of age and gender, location of hematoma and arachnoid cyst, trauma history, symptoms at admission, maximum hematoma diameter, contiguity between arachnoid cyst and hematoma, and treatment methods. Results: We treated 285 patients who were diagnosed with cSDH between January 2013 and December 2019. 22 patients were under the age of 40 years. Ten of them had both cSDH and arachnoid cysts. The mean age of patients was 24.8±3.9 years. Patients with only chronic subdural hematoma had higher mean age than the patients with arachnoid cyst-related chronic subdural hematoma. In four patients, the onset of chronic subdural hematoma was reported after arachnoid cyst diagnosis. Four of the patients did not have causative trauma history, and two patients suffered minor sports-related traumas. All patients had headache, and only two patients had hemiparesis. The location of arachnoid cysts were in the middle fossa in eight patients. All patients had chronic subdural hematomas on the ipsilateral side of arachnoid cyst. Four patients who had smaller than 10 mm maximal cSDH diameter underwent conservative management. They were followed by serial neuroimaging studies and it was noted that the hematoma disappered and the size of the arachnoid cysts decreased over time without any neurological complication. In six cases, craniotomy was required, and all recovered completely. cSDH did not recur during 5–60 months of follow-up period (median 12 months). Conclusions: It seems that presence of an arachnoid cyst in young adults is a predisposing factor for the formation of chronic subdural hematoma. Coincidentally diagnosed arachnoid cyst patients may be followed up with periodical clinical examinations and neuroimaging studies.
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Go, K. Gwan, Hendrik-Jan Houthoff, Johannes Hartsuiker, Engbert H. Blaauw, and Piet Havinga. "Fluid secretion in arachnoid cysts as a clue to cerebro-spinal fluid absorption at the arachnoid granulation." Journal of Neurosurgery 65, no. 5 (November 1986): 642–48. http://dx.doi.org/10.3171/jns.1986.65.5.0642.

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✓ The morphological similarity of the lining of arachnoid cysts to subdural neurothelium and the mesothelium of arachnoid granulations suggested that the latter tissues might be the origin of arachnoid cysts. Transport Na+-K+-adenosine triphosphatase was shown by enzyme ultracytochemistry to be an indication of secretory activity in the lining of arachnoid cysts and in the endothelial lining of arachnoid granulations. This secretory activity suggests the existence of a biochemical mechanism for cerebrospinal fluid absorption at these granulations separate from the mechanisms already demonstrated.
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Millichap, J. Gordon. "Arachnoid Cysts." Pediatric Neurology Briefs 5, no. 10 (October 1, 1991): 80. http://dx.doi.org/10.15844/pedneurbriefs-5-10-10.

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Dissertations / Theses on the topic "Arachnoïde"

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Cuny, Tourlonnias Marie-Laure. "Étude pré et post-opératoire des troubles neuropsychologiques et des difficultés d’apprentissage chez des enfants porteurs d’un kyste intracrânien temporo-sylvien." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB197.

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Notre objectif dans cette thèse était d'étudier l'impact éventuel d'un kyste arachnoïdien temporo-sylvien sur la cognition, le comportement et les apprentissages ainsi que l'effet de la chirurgie du kyste sur ces composantes. Une première étude auprès d'une cohorte de 100 enfants âgés de 3 à 16 ans ayant un kyste temporo-sylvien a montré des répercussions possibles du kyste chez certains enfants, avec un niveau intellectuel en général normal mais des troubles cognitifs modérés à importants pour un tiers des cas et importants pour un enfant sur cinq, prédominant au niveau du langage oral (capacités d'évocation), de la mémoire épisodique, de la mémoire de travail, de l'attention sélective visuelle, des fonctions exécutives et de la vitesse de traitement. La moitié des enfants a des difficultés d'apprentissage modérées principalement au niveau du langage oral et écrit et un quart des enfants a des troubles scolaires nécessitant des adaptation scolaires officielles ; un enfant sur quatre a des troubles du comportement et de l'humeur et un enfant sur deux avait déjà bénéficié de prises en charge avant le bilan, majoritairement de l'orthophonie et un suivi psychologique. Les enfants avec un kyste droit ont plus de troubles cognitifs et comportementaux que les enfants avec un kyste gauche avec significativement plus de prises en charge. En grandissant les enfants montrent significativement plus de difficultés d'apprentissage et plus de troubles neuropsychologiques, en particulier les enfants avec un kyste droit. L'étude post-opératoire auprès de 34 enfants montre un effet positif de l'opération pour les trois-quarts des enfants opérés avec une amélioration significative notamment au niveau intellectuel, en mémoire épisodique, en langage et au niveau comportemental, avec un effet significatif chez les plus jeunes enfants mais aussi chez les plus âgés. Les enfants avec un kyste gauche s'améliorent plus que ceux avec un kyste droit. Des troubles neuropsychologiques peuvent donc être observés en cas de kyste temporo-sylvien, ceux-ci restent modérés dans la majeure partie des cas mais peuvent durablement impacter la scolarité et le quotidien de certains enfants. Il parait ainsi important de dépister les enfants à risque afin de mettre en place rapidement des mesures préventives de prises en charge si besoin et de proposer éventuellement une opération du kyste en cas de troubles importants et durables, même chez des sujets âgés
Our objective in this thesis was to study the possible impact of an intracranial middle fossa cyst on cognition, behavior and learning and also the effect of surgery of the cyst. The first study found in a cohort of 100 children possible cyst effects in some children, with usually a normal intellectual level but moderate to important cognitive disorders for one-third of cases and important disorders for one child out of five, which are mostly language, memory, working memory, visual attention, executive functions and processing speed disorders. Half of the children have moderate learning difficulties, mostly in oral and written language and a quarter of children need school adaptations and have mood and behavioral disorders and before assessment half of them had already therapies, mostly speech therapy and psychological follow-up. Children with a right cyst have more cognitive and behavioral disorders than children with a left cyst and significantly more therapies. By growing children show significantly more learning disabilities and more neuropsychological disorders, especially children with a right cyst. The postoperative study in a cohort of 34 children showed a positive effect of surgery for the three-quarters of the children with a significant neuropsychological improvement in young but also elderly subjects. Children with a left cyst improved more than children with a right cyst. When a middle fossa cyst occurs then neuropsychological disorders may be present that are moderate in the majority of cases but that can permanently affect the schooling and the daily life of some children. It is therefore important to detect children at risk in order to rapidly introduce preventive measures of care if necessary and to propose a cyst operation if there are significant and lasting disorders, even in elderly subjects
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Magnus, Tielli. "Filogeografia do muriqui do sul, Brachyteles arachnoides (Primates, Atelidae)." Pontifícia Universidade Católica do Rio Grande do Sul, 2011. http://hdl.handle.net/10923/5389.

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Made available in DSpace on 2013-08-07T19:12:51Z (GMT). No. of bitstreams: 1 000434730-Texto+Completo-0.pdf: 855325 bytes, checksum: c32de7fd4729e20d9bcd4832226480d4 (MD5) Previous issue date: 2011
The species Brachyteles arachnoides, popularly known as southern muriqui, is considered the largest neotropical primate and currently listed as endangered, nevertheless no molecular population genetics study has been done so far in the southern muriqui. Here we analyze the phylogeography pattern, genetic diversity and demographic history of this species using sequences from part of the mtDNA Control Region and 14 microsatellites. The mtDNA showed a high genetic diversity and no clear evidence of geographical structuring. Moreover we showed that there was a population expansion around 15 thousand years ago and there is no concrete evidence of population decline. As well as in analysis with mtDNA, the microsatellites also showed no geographical structure, groups were not clearly defined and recent population decline was not evident. The lack of geographical structure was expected, mainly for mtDNA data, since females are known to disperse from their natal group, moreover the social groups are formed by male and females without an apparent hierarchy. For the other hand, as the microsatellites usually respond more rapidly to more recent fragmentation it would be expected they showed some evidence of structure caused by the recent fragmentation of Atlantic Forest, which was not observed. Similar results were also observed with the northern muriqui (Brachyteles hypoxanthus) that is critically endangered and occurs in more fragmented areas.
A espécie Brachyteles arachnoides, popularmente conhecido como muriqui do sul, é considerado o maior primata da América Latina e listado atualmente como estando ameaçado de extinção, apesar disso, até o momento, não existem estudos moleculares de genética de população a seu respeito. Aqui nós analisamos o padrão filogeográfico, diversidade genética e história demográfica da espécie utilizando sequências de parte da Região Controle do mtDNA e 14 loci de microssatélites. O mtDNA mostrou uma alta diversidade genética e nenhum indício claro de estruturação geográfica. Além disso, mostrou-se que houve uma expansão populacional há cerca de 15 mil anos atrás e não há nenhuma evidência concreta de declínio populacional. Assim como nas análises com mtDNA, os microssatélites também mostraram falta de estruturação geográfica, ausência de grupos definidos e nenhuma evidência de declínio populacional recente. A ausência de estruturação geográfica era esperada, principalmente para os dados de mtDNA, visto que as fêmeas são conhecidas por migrarem do seu grupo natal, além disso os grupos sociais de muriqui são formados por machos e fêmeas sem uma hierarquia aparente. Por outro lado, como os loci de microssatélite usualmente respondem rapidamente à fragmentação recente, seria esperado que eles mostrassem alguma evidência de estruturação causada pela recente fragmentação na Mata Atlântica, o que não foi observado. Resultados semelhantes também foram encontrados com o muriqui do norte (Brachyteles hypoxanthus) que está criticamente ameaçado e ocorre em áreas mais fragmentadas.
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Apra, Caroline. "Etude du développement des méninges & modélisation de tumeurs fibreuses solitaires chez la souris par introduction du gène de fusion NAB2-STAT6 dans les cellules PGDS-positives." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASL052.

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Les tumeurs fibreuses solitaires (TFS) méningées, comme les TFS somatiques, sont caractérisées par la présence d’un gène de fusion NAB2-STAT6. Cette fusion induirait la relocalisation nucléaire du facteur de transcription STAT6 et l’activation de la transcription des EGR, augmentant la prolifération. Les cellules des TFS méningées sont, comme celles des méningiomes, positives pour la prostaglandine-D2-Synthase (PGDS), présentes dans les méninges, en particulier l’arachnoïde. Dans la 1ère partie, nous avons montré que les TFS bénignes peuvent se transformer en TFS malignes - anciennement hémangiopéricytomes - et nous avons rapporté l’efficacité thérapeutique du pazopanib, inhibiteur de facteur de croissance de l’endothélium vasculaire. La 2ème partie est consacrée à l’étude moléculaire des TFS : la comparaison de l’exome de paires de TFS, avec un primitif de grade I et la récidive de grade III, a permis d’identifier le variant pathogène de TP53 c.743G>T. L’étude du transcriptome des TFS méningées a mis en évidence l’agrégation des TFS de toutes localisations entre elles, bien distinctes des méningiomes. La 3ème partie présente la modélisation des TFS méningées chez des souris génétiquement modifiées par introduction de deux gènes de fusion NAB2-STAT6 (exons 2-16 et 6-17). Les rétrovirus RCAS-NAB2-STAT6, injectés à la naissance dans l’espace sous-dural de souriceaux PGDS-tva infectent spécifiquement les cellules arachnoïdiennes. Après plus d’un an de suivi, les animaux n’ont développé aucune TFS. Il est probable que, comme dans plusieurs autres modèles tumoraux, la fusion ne suffise pas à induire le développement des tumeurs. Dans la 4ème partie nous avons adapté la méthode iDisco, qui permet l’immunomarquage et la visualisation en trois dimensions d’échantillons cérébraux, aux embryons de souris et aux crânes entiers, et décrit in situ l’expression de PGDS chez la souris, entre le 11ème jour post-conception et le 7ème jour post-natal. Elle concerne la méninge de la base du crâne aux stades précoces et la convexité en post-natal, mais également des cellules de la glie radiaire
Meningeal solitary fibrous tumors (SFT), like somatic SFT, are characterized by the NAB2-STAT6 fusion gene. This fusion induces the nuclear relocation of the STAT6 transcription factor and the activation of EGR transcription, increasing proliferation. Meningeal SFT cells, like meningioma cells, are positive for prostaglandin-D2-Synthase (PGDS), a specific marker of meningeal, especially arachnoid, cells. In Part 1, we showed that benign SFT can transform into malignant TFS - formerly hemangiopericytomas - and we reported the therapeutic efficacy of pazopanib, an inhibitor of vascular endothelial growth factor. Part 2 is devoted to the molecular study of SFT: the comparison of the exome of pairs of SFT, a grade I primary and grade III recurrence, brought out the pathogenic variant of TP53 c.743G> T. The transcriptome of meningeal SFT showed the aggregation of SFT from all localizations, distinct from meningiomas. Part 3 presents the modeling of meningeal SFT in genetically modified mice by the introduction of two NAB2-STAT6 fusion genes (exons 2-16 and 6-17). The RCAS-NAB2-STAT6 retroviruses, injected at birth into the subdural space of PGDS-tva mice, specifically infect arachnoid cells. After more than a year of follow-up, the animals did not develop any SFT. It is likely that, as in many other tumor models, fusion is not sufficient to induce tumor development. In Part 4, we adapted the iDisco method, which usually allows three-dimensional visualization of brain samples, for mouse embryos and whole skulls, and described the expression of PGDS in mice in situ, between the 11th post-conception day and the 7th post-natal day. It is located in the meninges at the skull base in the early stages and at the convexity after birth, and also in the radial glia
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Coles, R. C. "Fission-fusion sociality in southern muriquis (Brachyteles arachnoides) in continuous Brazilian Atlantic forest." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597841.

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The factors that shape the evolution and maintenance of fission-fusion dynamics are determined in this thesis, by investigating the egalitarian muriqui, inhabiting a dense-ombrophilous, sub-montane forest with mild seasonality in fruit availability. A habituated study group at Parque Estadual Carlos Botelho, São Paulo State, Brazil was observed for 13 months, in dry and wet seasons. Instantaneous scans (6393 scans, 1599 observation hours), focal samples and ad libitum observations were conducted on parties to record individual and party-level behaviours. Food availability was determined at two spatio-temporal scales: i) habitat-wide (absolute) using data from vegetation transects and monthly monitoring of phenophase productivity, and ii) patch-level (effective) using data from actual food resources exploited by the muriquis. Southern muriquis had a relatively small mean party size (3.34 adults) and showed lower group cohesion compared with other fission-fusion species. However, variation in party duration or spatial arrangement and sub-group size highlights a continuum in fragmentation patterns. The lack of a relationship between party size and fruit availability suggests that muriquis experience substantial travel costs associated with being in larger than optimal party sizes (despite non-territoriality and multiple central-place foraging). In conclusion, fission-fusion dynamics and facultative behaviours may not solely function to decrease feeding competition. Social preferences constrain the formation of the parties, and same-sex associations within parties reflect sexual segregation between parties throughout the year. The prevalence and complexity of fission-fusion dynamics in the study population is suggested to be due to social factors (e.g. social foraging, individual based decision making) in an environment where fruit is aseasonal and fruit species asynchronous in availability.
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Santos, Stéfanie Vanessa. "Patologia comparada de Brachyteles arachnoides e Brachyteles hypoxantus (E. Geoffroy, 1806, Atelidae - Primates)." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-25072012-102439/.

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O gênero Brachyteles, endêmico do Brasil, é constituído por duas espécies, B. arachnoides e B. hypoxantus, e estudos recentes demonstraram que suas populações selvagens podem estar seriamente reduzidas. Na tentativa de reverter a situação atual, esforços têm sito realizados visando a conservação dos muriquis, no entanto, dados relativos à condição sanitária de Brachyteles são extremamente escassos. Sabe-se, que o estabelecimento de protocolos adequados de manejo é condição necessária para a manutenção das espécies em cativeiro, sobretudo as ameaçadas e/ou criticamente ameaçadas, como é o caso dos atelídeos em questão. Desse modo, o presente trabalho de pesquisa almejou investigar as principais alterações anátomo-patológicas e correspondentes causas de morte de 18 (10M:8F) espécimens de B. arachnoides, B .hypoxantus e híbridos mantidos em cativeiro junto ao Centro de Primatologia do Rio de Janeiro (CPRJ). Os animais foram necropsiados entre os anos de 1988 e 2010 sendo utilizados fragmentos de órgãos e tecidos colhidos e fixados em solução de formalina a 10%, sendo 9 exemplares de B. arachnoides, 3 B hypoxantus e 4 híbridos, totalizando 16 indivíduos pertencentes ao acervo do CPRJ/FEEMA, e 2 B. arachnoides pertencentes ao Parque Municipal Quinzinho de Barros (FZQB). Destes, 2 (11,1 %) eram neonatos, 2 (11,1%) jovens, 13 (72,2%) adultos e 1 (5,6%) idosos. O peso dos B. arachnoides, B. hypoxantus e B. híbridos adultos, jovens e neonatos variou de 0,5 Kg até 14 Kg. O peso médio dos adultos foi 5,6 Kg. O peso médio dos adultos foi de 2,8 Kg para os caquéticos, 5,9 Kg para os magros, 8,25 Kg para os bem nutridos. Dados de histórico clínico, reprodutivo, comportamentais e análises clínicas foram avaliados visando auxílio na obtenção da causa de morte (CM). A diarréia foi a alteração clínica mais consistente observada no grupo pesquisado sendo que cinco mortes (27,8%) foram causadas por quadros de sepses, quatro por infecção viral (22,2%), três (17%) por pneumonias, dois (11%) por parasitismo. Distúrbio metabólico, peritonite e eutanásia decorrente de retrovirose foram responsáveis por 1 óbito cada (5,5%). Não foi possível determinar a CM de um (5,5%) neonato em avançado estado de putrefação. Destes 18 casos de óbito, três (17%) foram decorrentes das conseqüências da infecção por um agente viral da família Retroviridae. A análise histomorfométrica mostrou que a taxa de hemossiderose hepática (THH) variou entre 0.2% e 41.7%, não havendo diferenças significantes entre as THHs quando comparados os parâmetros sexo, idade, tempo de cativeiro, espécies e peso. A análise estatística revelou correlação entre as áreas de hemossideorse e reticulina pelo teste de Sperman com (P=0,0326, r= -0,5048) No entanto, não observou-se correlação ao avaliar a morfometria da reticulina e as graduações histopatológicas de necrose (P=0,1009, Sperman, r= 0,3991). O mesmo padrão foi observado ao avaliar a correlação entre as áreas de reticulina e os casos sépticos e não sépticos com (P= 0,6126, Mann-Whitney test). Os agentes etiológicos diagnosticados através de imuno-histoquímica, análise ultra-estrutural e/ou molecular foram: Herpes simplex, Vírus respiratório sincicial (RSV), vírus compatíveis com a família Retroviridae, Toxoplasma gondii, Entamoeba spp., Strongyloides spp., Candida spp. e Helicobacter pylori. O potencial zoonótico dos agentes infecciosos identificados reflete a importância da implantação de medidas preventivas rigorosas com o objetivo de preservar a saúde da comunidade humana e dos muriquis. Uma monitoração sanitária através de exame clínico e colheita de material biológico também foram realizadas em 10 espécimes cativos de muriquis. Pretende-se, de forma pioneira representar a sistematização de processos patológicos envolvendo espécimes do gênero Brachyteles cativos, contribuindo para a manutenção destes espécimens em cativeiro, assim como indiretamente na conservação destes em vida livre, sugerindo protocolos sanitários preventivos e favorecendo a reprodução e manutenção das populações.
The Brachyteles genus is endemic in Brazil, comprises two species, B. arachnoides and B. hypoxantus, and recent studies have shown that their wild populations can be seriously reduced. In an attempt to reverse the current scenario, efforts have been made to promote the conservation of muriquis, however, data on the sanitary condition of Brachyteles are extremely scarce. It is known that the establishment of appropriate management protocols is a prerequisite for the maintenance of the captive species, especially threatened and / or critically endangered, as is the case in question, atelids. Thus, the present research aimed to investigate the main anatomic-pathological and related causes of death in 18 (10M:8F) specimens of B. arachnoides, B. hypoxantus and hybrids in captivity at the Centro de Primatologia do Rio de Janeiro (CPRJ). The animals were autopsied between 1988 and 2010, being used fragments of organs and tissues removed and stained in formalin solution 10%, and 9 individuals of B. arachnoides, 3 B. hypoxantus and 4 hybrids, a total of 16 individuals belonging to the collection of CPRJ / FEEMA, and 2 B. arachnoides belonging to the Parque Municipal Quinzinho de Barros (FZQB). Of these, 2 (11.1%) were neonates, 2 (11.1%) youth, 13 (72.2%) adults and 1 (5.6%) elderly. The weight of adults, newborns and young B. arachnoides, B. hypoxantus and B. hybrid ranged from 0.5 kg to 14 kg average weight of adults was 5.6 kg average weight of adults was 2.8 kg for cachectic 5.9 kg for lean, 8.25 kg for well-nourished. Data from clinical history, reproductive, behavioral and medical tests were assessed for assistance in obtaining the cause of death (CD). Diarrhoea was the most consistent disease observed in this group and five deaths (27.8%) were caused by sepsis boards, four viral infection (22.2%), three (17%) for pneumonia, two ( 11%) of parasitism. Metabolic disorder, euthanasia and peritonitis resulting from a retrovirus were responsible for one each death (5.5%). We were unable to determine the CD of one (5.5%) neonate in an advanced state of putrefaction. Of these 18 deaths, three (17%) resulted from the consequences of infection by a viral agent of the family Retroviridae. Histomorphometric analysis showed that the hepatic hemosiderosis rate (HHR) ranged between 0.2% and 41.7%, with no significant differences between the HHR compared the parameters sex, age, time in captivity, species and weight. Statistical analysis revealed a correlation between areas of reticulin hemossideorse and with the Spearman test (P = 0.0326, r = -0.5048). However, no correlation was seen when evaluating the morphometry of reticulin and histopathological grades of necrosis (P = 0.1009, Spearman r = 0.3991). The same pattern was observed to evaluate the correlation between areas of reticulin and cases with septic and non septic (P = 0.6126, Mann-Whitney test). The etiologic agents diagnosed by immunohistochemistry, ultrastructural analysis and molecular were: Herpes simplex, Respiratory Syncytial Virus (RSV), consistent with the virus family Retroviridae, Toxoplasma gondii, Entamoeba spp., Strongyloides spp., Candida spp. and Helicobacter pylori. The zoonotic potential of the infectious agents identified reflects the importance of strict implementation of preventive measures in order to preserve the health of human communities in contact with the muriquis. A health monitoring by clinical examination and collection of biological material were also performed in 10 specimens of captive muriquis. We aim, in a pioneering way, represent the systemization of processes involving pathological specimens of the genus Brachyteles captives, contributing to the maintenance of these specimens in captivity, as well as indirectly on the conservation of these in the wild, suggesting preventive health protocols and encouraging the breeding and maintenance of populations
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Bradley, Victoria. "Determining sub-arachnoid haemorrhage in the clinical biochemistry laboratory utilising cerebrospinal fluid samples." Thesis, University of Portsmouth, 2013. https://researchportal.port.ac.uk/portal/en/theses/determining-subarachnoid-haemorrhage-in-the-clinical-biochemistry-laboratory-utilising-cerebrospinal-fluid-samples(b68c29d7-afbe-4e20-9c26-a293df652963).html.

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Introduction: Sub-arachnoid haemorrhage (SAH) occurs when cerebral artery ruptures and blood leaks out into the sub-arachnoid space. This is often a catastrophic event for the individual and morbidity and mortality rates are significantly influenced by early intervention. This makes the role of the clinical biochemistry laboratory in early diagnosis vitally important, as delays in diagnosis can have a major clinical impact. The cerebrospinal fluid (CSF) of healthy individuals is optically clear. It has, however, been recognised for over a century that it can become coloured (xanthochromia) following a cerebrovascular incident such as a SAH. This has made the main role of the clinical biochemistry laboratory in SAH diagnosis that of detecting xanthochromia in the CSF. The majority of laboratories which offer a xanthochromia screening service use the national guidelines that are based upon ultra-violet scanning spectrophotometry (350 nm to 600 nm). This analytical technique is not without its problems: it is subjective, has a possibility of inter-operator variability and due to the specialised nature of the test can take many hours or even days for a result to be issued. This project aimed to improve the current laboratory service by investigating: turnaround times, users opinions of the current service and potential alternative analytical methods. Methods: An audit of the current analytical provision was used to assess its effectiveness and in order to elucidate the service users’ perception. This was effected by a questionnaire that was distributed to service users across three different NHS Trusts in England and Wales. In an attempt to improve the laboratory service, alternatives to scanning spectrophotometry were investigated. These were selected through consideration of the nature of SAH i.e. blood is released into the subarachnoid space and the brain is damaged. Laboratory analysis therefore needed to focus on detecting the presence of blood and/or its breakdown products, any change in CSF constituents that arise as a direct consequence of blood being introduced in to the subarachnoid space or a specific analyte which would only be present if brain damage occurred. Investigation of current research into subarachnoid haemorrhage identified the following analytes as potential alternatives: CSF diazo bilirubin, CSF Ferritin, CSF protein S100 and serum protein S100. Results: The audit revealed the average turnaround time for reporting xanthochromia results to be 26 hours, with almost 20% of samples being reported as equivocal. The service user’s questionnaire revealed a general lack of awareness of current United Kingdom National External Quality Assurance Scheme (UKNEQAS) guidelines for the ‘Analysis of cerebrospinal fluid for bilirubin in suspected Subarachnoid haemorrhage’ and a lack of understanding regarding the timing of lumbar punctures. Additionally, one third of users felt that the turnaround time for results was inadequate. CSF protein S100 was found to be unsuitable due to the difficulty in achieving a suitable balance between sensitivity and specificity; at a cut-off of 0.40 μg/l sensitivity is 80% and specificity is 4%, at a cut-off of 1.60 μg/l sensitivity is 40% and specificity is 94%. Serum protein S100 was found to be unsuitable due to the difficulty in achieving a suitable balance between sensitivity and specificity at appropriate cut-offs (66 % and 73%, respectively, at a cut-off of 0.09 μg/l). When the CSF diazo bilirubin and CSF ferritin were compared to current laboratory practises using pre-defined criteria then CSF diazo bilirubin was found to be the analyte of choice to base new guidelines upon. CSF diazo bilirubin was then used as an initial ‘rule-out’ step in a new set of guidelines for the determination of SAH utilising CSF analysis. Conclusion: The new guidelines employ CSF diazo bilirubin analysis as a ‘rule-out’ step with all samples that are above the cut-off (300 nmol/l) being processed through the UKNEQAS guidelines. In order for the guidelines to be introduced and accepted, local training and education programmes for laboratory and clinical staff will need to be developed and implemented and they will need to be disseminated through publication of articles in journals relevant to both the clinical biochemistry community and requesting clinicians.
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Lavareda, Diana Isabel Carvalho. "Clínica de animais de companhia: seizures: an intracranial arachnoid cyst as cause with surgical treatment." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/13548.

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The last year of Veterinary Medicine’s MSc degree is reserved to do an internship where the veterinary student has the opportunity to improve his skills. This internship report is the final result from six months of internship done in two different veterinary hospitals, one from Sydney (Australia) and the other one from Oporto (Portugal). The first part of this document is focus on the activities undertaken along the internship, outlined by graphs and tables. There are also descriptions of those activities, using figures and some bibliography to complement it. A monograph about seizures – an intracranial arachnoid cyst as cause with surgical treatment makes up the second part of this internship report. It starts with literature review about seizures and ends with one successful case report followed by the internal medicine and surgery specialists of the veterinary hospital in Sydney; Resumo: “Clínica de Animais de Companhia” – Convulsões: uma causa quística intracraniana com tratamento cirúrgico. O último ano do Mestrado Integrado em Medicina Veterinária é reservado à realização do estágio curricular, onde o qual o estudante de medicina veterinária tem a oportunidade de desenvolver e melhorar os seus conhecimentos. Este presente relatório é o resultado final de seis meses de estágio, realizado em dois hospitais veterinários, um deles localizado em Sidney (Austrália) e o outro no Porto (Portugal). A primeira parte deste documento está direcionada às atividades desenvolvidas durante o estágio, esquematizadas em gráficos e tabelas. Também foram acrescentadas descrições às mesmas, recorrendo ao uso de imagens e bibliografia de maneira a documentá-las da melhor maneira possível. Uma monografia perfaz a segunda parte deste relatório de estágio, com o tema “Convulsões: uma causa quística intracraniana com tratamento cirúrgico”. Esta inicia-se com uma revisão bibliográfica sobre convulsões, terminando com um relato de um caso de sucesso seguido pelos especialistas do hospital veterinário de Sidney.
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Harper, Alan M. "A cross-sectional study of executive functioning and quality of life after sub-arachnoid haemorrhage." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/26581.

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Despite many survivors of subarachnoid haemorrhage (S A H) being classed as having a 'good neurological outcome' (Glasgow Outcome Scale (GOS)=1) there is a growing awareness that these individuals may display a range of cognitive deficits (EG poor memory) and a reduced quality of life (EG impaired social relations). There appears to exist, therefore, a discrepancy between neurological and functional outcome. The site of the aneurysm appears to have little to do with these deficits, although the presence of delayed cerebral ischaemia may contribute to them. Rather, it is hypothesized that the SAH itself results in diffuse damage producing a sequelae reminiscent to that found after mild traumatic brain injury. The executive functions of the brain, due to the involvement of widespread locations and multiple cortical and sub-cortical circuits, are particularly sensitive to diffuse damage. As such, it is hypothesized that some patients despite being classed as having made a good recovery will show executive dysfunction. This is important, as it may in part explain the discrepancy between neurological and functional outcome, with poor executive functioning being predictive of cognitive impairment and reduced quality of life. In the present study a group of approximately 40 subjects, who were classified as G O S =1, were assessed with a range of measures examining executive functions, cognitive functions and psychosocial outcome including quality of life. The relationships between these variables were explored. The subjects were either early (6 to 12 months) or late (5+ years) post aneurysm which allowed the hypothesis that there would be no significant change in deficits over time to be tested. In addition, the influences of acute factors from the time of the aneurysm were examined. These results are discussed and the proposal made that SAH patients, even those making a seemingly good recovery, should be screened for cognitive and executive deficits using a brief assessment battery relatively soon post aneurysm. This would allow for the possible rehabilitation of any deficits, which may help ameliorate the poor psychosocial outcome found in some aneurysm patients.
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Holman, David W. "Development, Characterization, And Implementation Of An In Vitro Model Of Cerebrospinal Fluid Outflow Across The Arachnoid Granulations." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218561491.

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Talebi, Gomes Mauricio. "Factors affecting food choice of the endangered Southern Muriquis (Brachyteles arachnoides, PRIMATES, E. Geoffroy 1806) in the Brazilian Atlantic Forest." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615142.

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Books on the topic "Arachnoïde"

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Arachnoid Cysts. Elsevier, 2018. http://dx.doi.org/10.1016/c2015-0-07024-1.

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Arachnoid Cysts. Elsevier, 2018. http://dx.doi.org/10.1016/c2017-0-01879-7.

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Eslick, Guy D., Knut Wester, and Helland A. Christian. Arachnoid Cysts: Epidemiology, Biology, and Neuroimaging. Elsevier Science & Technology Books, 2017.

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Wester, Knut. Arachnoid Cysts: Clinical and Surgical Management. Elsevier Science & Technology Books, 2017.

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Nguyen, Katherine. Arachnoid Cysts: Epidemiology, Treatment and Clinical Outcomes. Nova Science Publishers, Incorporated, 2016.

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British Brain & Spine Foundation., ed. Sub-arachnoid haemorrhage: A guide for patients and carers. 2nd ed. London: British Brain and Spine Foundation, 1998.

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Rizk, Elias, Aaron S. Dumont, Joe Iwanaga, Shane R. Tubbs, and Anthony V. D'Antoni. Cerebrospinal Fluid and Arachnoid Space : Volume 1: Clinical Anatomy and Physiology. Academic Press, 2021.

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British Brain and Spine Foundation. and Royal College of Surgeons of England., eds. The British Brain and Spine Foundation sub-arachnoid haemorrhage information booklet. London: Royal College of Surgeons of England, 1994.

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Publications, ICON Health. Arachnoid Cysts - A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References. Icon Health Publications, 2004.

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Publications, ICON Health. The Official Patient's Sourcebook on Arachnoid Cysts: A Revised and Updated Directory for the Internet Age. Icon Health Publications, 2002.

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Book chapters on the topic "Arachnoïde"

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Kereszturi, Ákos, and Veli-Petri Kostama. "Arachnoid." In Encyclopedia of Planetary Landforms, 1–5. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-9213-9_4-1.

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Kereszturi, Ákos, and Veli-Petri Kostama. "Arachnoid." In Encyclopedia of Planetary Landforms, 83–86. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-3134-3_4.

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Helbert, Jörn. "Arachnoid." In Encyclopedia of Astrobiology, 118. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_95.

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Helbert, Jörn. "Arachnoid." In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_95-3.

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Helbert, Jörn. "Arachnoid." In Encyclopedia of Astrobiology, 56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_95.

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Kasper, Michael. "The Arachnoidea." In Cytokeratins in Intracranial and Intraspinal Tissues, 37–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77298-6_8.

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Spacca, Barbara, and Andrew Brodbelt. "Arachnoid Cyst." In Encyclopedia of Clinical Neuropsychology, 331–37. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-57111-9_539.

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Westermaier, Thomas, Tilmann Schweitzer, and Ralf-Ingo Ernestus. "Arachnoid Cysts." In Advances in Experimental Medicine and Biology, 37–50. New York, NY: Springer US, 2012. http://dx.doi.org/10.1007/978-1-4614-0653-2_3.

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Spacca, Barbara, and Andrew Brodbelt. "Arachnoid Cyst." In Encyclopedia of Clinical Neuropsychology, 239–45. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-0-387-79948-3_539.

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Schroeder, H. W. S. "Arachnoid Cysts." In Practical Handbook of Neurosurgery, 441–53. Vienna: Springer Vienna, 2009. http://dx.doi.org/10.1007/978-3-211-84820-3_28.

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Conference papers on the topic "Arachnoïde"

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Liu, Tzu-Li, Sulmaz Zahedi, R. Justin Garling, Francis Kralickk, Carolyn A. Harris, and Mark Ming-Cheng Cheng. "Prosthetic arachnoid granulations using 3D printing technology." In 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2017. http://dx.doi.org/10.1109/memsys.2017.7863463.

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Hashemi, Siavash, Parisa Saboori, Shahab Mansoor-Baghaei, and Ali M. Sadegh. "On the Trabecular Morphologies and Load Transfer to the Brain." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65083.

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The human brain trabeculae contain strands of collagen tissues connecting the arachnoid to the pia mater. In this paper the mechanotransductions of the external loads to the head passing through different trabecular architectures of the subarachnoid space were investigated. This has been accomplished by creating several local 2-D models consist of skull, dura mater, arachnoid, trabecular architecture and the brain. Different orientations of several architectures of the trabeculae were also analyzed. All models were subjected to the same loading and constraints. The strains in the brain for each model of the architecture and morphology were determined and compared to other corresponding models. It is concluded that the strain in the brain is less where the tree-shape trabeculae are upright, where the branches are attached to the arachnoid mater and the stems are attached to the pia mater. In addition, in the case of other morphologies the strain in the brain is less when the ratio of the trabecular area to the CSF space is less.
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Ardekani, Babak A., Michael Braun, Brian F. Hutton, and I. Kanno. "Automatic detection of arachnoid contours in MR images." In Visualization in Biomedical Computing 1994, edited by Richard A. Robb. SPIE, 1994. http://dx.doi.org/10.1117/12.185201.

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Ma, Chunsheng, Xin Jin, Jinhuan Zhang, and Shilin Huang. "Development of the Pia-Arachnoid Complex Finite Element Model." In 2008 2nd International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2008. http://dx.doi.org/10.1109/icbbe.2008.757.

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Zoghi-Moghadam, M., Ali Sadegh, and Charles Watkins. "Arachnoid Trabeculae and CSF Roles in Blunt Head Impacts." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42965.

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The blunt head impacts due to vehicular collisions, contact sports or falls cause relative motion between the brain and skull and an increase in contact and shear stresses in meningeal region. Several models have been developed to better understand brain injuries. In this study the mechanical role of the fibrous trabeculae and the Cerebrospinal Fluid (CSF) in Subarachnoid space (SAS) is investigated. Two-dimensional solid and fluid global models of the head and a local model of the SAS trabeculae were developed. The CSF pressure distribution and the trabeculae deformations were determined. It is concluded that the arachnoid trabeculae reduce the pressure in the CSF and both play a major role in damping the blunt head impact.
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Saboori, Parisa, and Ali Sadegh. "Brain Subarachnoid Space Architecture: Histological Approach." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64474.

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Human brain is suspended in the skull through three fibrous tissue layers, dura mater, arachnoid and pia mater, known as the meninges layer. The space between the arachnoid and pia mater is known as subarachnoid space (SAS). SAS consists of arachnoid trabeculae and cerebrospinal fluid (CSF), which stabilizes the shape and the position of the brain during head movements. Through solid-fluid interaction, it has been shown that subarachnoid space (SAS) trabeculae plays an important role in damping and reducing the relative movement of the brain with respect to the skull, thereby reducing traumatic brain injuries (TBI), (Zoghi and Sadegh 2010). While the functionality of the SAS is understood, the architecture, the histology and biomechanics of this important region has not been fully investigated. In their modeling of the head, previous investigators have over simplified this important region. This is due to the trabeculae’s complex geometry, abundance of trabeculae and lack of the material properties. These simplifications could lead to inaccurate results of finite element head studies. Killer HE, et al, (2003) investigated the trabecular histology of optical nerves and Alcoldo, et al (1986) used Scanning Electron Microscopy (SEM) to study the arachnid mater of the SAS. The result of these studies reveal that the arachnoid is a thin vascular layer composed of fibroblast cells interspersed with bundles of collagen and the trabecula is also a collagen based structure. However, the brain SAS trabecular architecture and histology has not been fully investigated. The goal of this study is to investigate the mechanotransduction of the head impacts to the brain with the emphasis on the role of material modeling and architecture of the subarachnoid space as it relates to Traumatic Brain Injuries (TBI). This goal was accomplished through three aims including experimental studies, material modeling and a 3D finite element model. In this paper, to present a global view of this investigation, brief descriptions of each aim are presented. It was concluded that the trabeculae contain collagen Type I with tree-shaped architecture and the validated material properties of SAS is approximately E = 1000 Pa.
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Stricker, S., S. Puget, and R. Guzman. "Temporo-Sylvian Arachnoid Cysts in Children – Ongoing Debate on Management." In Joint Annual Meeting 2017: Swiss Society of Neurosurgery, Swiss Society of Neuroradiology. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1603879.

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Dumitrescu, Anda, Michael Moore, Darach Crimmins, and Niamh McSweeney. "GP104 Arachnoid cysts in a paediatric population – presentation and outcome." In Faculty of Paediatrics of the Royal College of Physicians of Ireland, 9th Europaediatrics Congress, 13–15 June, Dublin, Ireland 2019. BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health, 2019. http://dx.doi.org/10.1136/archdischild-2019-epa.169.

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Bhatti, Shahzad Karim, and Umair Rashid. "Sub Arachnoid Hemorrhage: Update in Endovascular Treatment of Intracerebral Aneurysms." In PAIRS Annual Meeting. Thieme Medical and Scientific Publishers Pvt. Ltd., 2017. http://dx.doi.org/10.1055/s-0041-1729807.

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Aljuboori, Zaid, and Jeremy Clark Brian Williams. "Fenestration of a Symptomatic Intrasellar Arachnoid Cyst through an Eyelid Incision." In 30th Annual Meeting North American Skull Base Society. Georg Thieme Verlag KG, 2020. http://dx.doi.org/10.1055/s-0040-1702655.

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You might also be interested in the extended bibliographies on the topic 'Arachnoïde' for particular source types:
Journal articles Dissertations / Theses Books
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