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Dissertations / Theses on the topic 'Sleep-wake cycle'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Yin, Weiwei. "A Mathematical Model of the Sleep-Wake Cycle." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14508.

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The daily sleep-wake cycle usually consists of three distinct states: wakefulness, non-rapid-eye-movement (NREM) and rapid-eye-movement (REM). The process of switching between different states is complex, but a common assumption is that it is regulated primarily by two processes (the circadian and the homeostatic process) via reciprocal interactions of several downstream neuron groups. These interactions not only result in often rapid transitions from one state to another, but also allow for a certain degree of bi-stability that locks the organism in a given state for some while before it swi

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2

Grow, Brian J. Sullivan Matthew C. "Assessing the effect of shipboard motion and sleep surface on sleep effectiveness." Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FGrow.pdf.

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Thesis (M.S. in Human Systems Integration)--Naval Postgraduate School, December 2009.<br>Thesis Advisor(s): Miller, Nita Lewis. Second Reader: McCauley, Michael E. "December 2009." Description based on title screen as viewed on January 26, 2010. Author(s) subject terms: Sleep Efficiency, Sleeping Surface, Acceleration, Motion Effects on Sleep, Actigraphy, Sleep Quality, Shipboard Sleep. Includes bibliographical references (p. 83-87). Also available in print.

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3

Webster, Harry 1947. "The role of cholinergic neurons of the dorsolateral pontomesencephalic tegmentum in sleep-wakefulness states /." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75890.

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Pontomesencephalic tegmental cholinergic neurons were destroyed in cats by local injections of kainic acid in order to assess the role of these neurons in sleep-wakefulness states and in the defining variables of these states: EEG (electroencephalographic) and EMG (electromyographic) amplitude, PGO (ponto-geniculo-occipital) spike rate, REMs (rapid eye movements) and (OBS) olfactory bulb spindles. Loss of cholinergic innervation to forebrain and brainstem structures was also assessed by histochemistry. Histological and histochemical analysis of the brains after the lesion showed a major destru

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4

Eder, Derek N. "A naturalistic study of sleep regulation in seasonal affective disorder : SAD, asleep, and unresponsive /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/9072.

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5

D'Agnese, Mattiangelo. "Sleep-wake cycle: a new analysis for the two-step process model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19307/.

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Il ciclo sonno-veglia é oggetto di studio per molti scienziati e matematici da più di trent’anni ma nonostante ciò molti quesiti non trovano ancora una risposta. Capire i meccanismi e le dinamiche del ciclo sonno-veglia è un problema molto importante perché le sue alterazioni possono avere conseguenze significative sulla salute umana. In questo lavoro viene presentato un modello matematico, con basi biologiche, del ciclo sonno-veglia. La principale novità rispetto ai modelli precedenti è l’utilizzo di un accurato modello neuronale, il modello di Hodgkin-Huxley,

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6

Yu, Xiao. "Histamine at the intersection of the sleep-wake cycle and circadian rhythms." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/26596.

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Histamine is central in sleep-wake regulation. First, I mapped the distribution of histamine producing neurons in the adult brain using genetic approaches. Second, to further explore the histaminergic system, I found that a local circadian clock regulates the expression of histidine decarboxylase (HDC), the enzyme producing histamine in hypothalamic neurons. The level of this enzyme varies with time of day and is up-regulated by sleep deprivation. I disrupted this local clock by using HDC-Cre recombinase by deleting BMAL1, the transciption factor central to circadian rhythms, selectively in hi

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7

Assadzadeh, Sahand. "Large-Scale Brain Dynamics: Plasticity and States of Consciousness." Thesis, University of Sydney, 2018. https://hdl.handle.net/2123/23708.

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The brain is a complex system that exhibits rich multiscale dynamics. Large-scale activity in this system are readily observable by a range of methods including electroencephalography (EEG). Changes to the global state of the brain, including arousal states such as wakeful consciousness and its temporary disappearance with sleep onset, are associated with major changes in brain electric activity as seen in the EEG. However, the purpose of the sleep state, which involves widespread changes in activity that occur in the brain, remains a matter of debate, especially because very little content of

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8

Reid, Kathryn J. "Measuring adaption to shiftwork /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phr3561.pdf.

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9

Martin, Jennifer Lynn. "Aging and sleep in schizophrenia patients and normal comparison subjects : subjective reports and objective findings /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2002. http://wwwlib.umi.com/cr/ucsd/fullcit?p3049676.

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10

Haynes, Patricia L. "Circadian impact of psychosocial factors in depression /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3094609.

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11

Rosa, Dayane Eusenia 1985. "Relação do ciclo vigília-sono com alterações de glicemia e pressão arterial em idosos atendidos pela Estratégia Saúde da Família = The relationship of sleep-wake cycle with glucose and blood pressure variations in elderly people attended by Health Family Strategy." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/310920.

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Orientador: Maria Filomena Ceolim<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas<br>Made available in DSpace on 2018-08-21T06:44:31Z (GMT). No. of bitstreams: 1 Rosa_DayaneEusenia_M.pdf: 2388246 bytes, checksum: 965d231ec454dc29cb84fa308bdf17ba (MD5) Previous issue date: 2012<br>Resumo: A hipertensão arterial sistêmica (HAS) e o diabetes mellitus (DM) são doenças crônicas que se encontram entre as principais causas de mortalidade no mundo, de acordo com a Organização Mundial de Saúde. As perturbações do sono, que são prevalentes na idade avançada

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12

Jouvencel, Aurore. "Cycle veille-sommeil et vulnérabilité cérébrale de la personne âgée : étude d'imagerie et d'actimétrie." Electronic Thesis or Diss., Université Paris sciences et lettres, 2024. http://www.theses.fr/2024UPSLP027.

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L'objectif principal de cette thèse était de déterminer comment les perturbations du cycle veille-sommeil et du sommeil peuvent constituer des facteurs de vulnérabilité cérébrale. Nous avons utilisé une combinaison de mesures écologiques du cycle veille-sommeil et de l'imagerie multimodale récoltées sur des cohortes de volontaires Français et Néerlandais afin d'appréhender de manière globale la relation entre le cycle veille-sommeil et la santé cérébrale.Nous avons d'abord montré la complémentarité des méthodes objective et subjective (actimétrie et PSQI) pour évaluer la qualité et la durée du

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13

Sawyer, Tiffoney L. "The effects of reversing sleep-Wake cycles on mood states, sleep, and fatigue on the crew of the USS John C. Stennis /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FSawyer.pdf.

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Thesis (M.S. in Applied Science (Operations Research))--Naval Postgraduate School, June 2004.<br>Thesis advisor(s): Nita Lewis Miller. Includes bibliographical references (p. 103-107). Also available online.

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14

Colby-Milley, Jessica. "Characterization of the sleep-wake cycle in the TgCRND8 mouse model of Alzheimer's disease: from early to advanced pathological stages." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121302.

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Individuals affected by Alzheimer's disease (AD) experience a progressive decline in cognitive function eventually leading to a debilitating loss of memory, reasoning and communication. Although AD is readily associated with such cognitive symptoms, patients can also experience behavioural and psychological symptoms, including perturbations of the sleep-wake cycle. Features of sleep-wake cycle disturbances in AD patients include increased nocturnal awakenings and a decrease in slow-wave non-rapid eye movement sleep (NREMS) and rapid eye movement sleep (REMS). Furthermore, changes in sleep qual

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15

Schenberg, Eduardo Ekman. "Caracterização eletrofisiológica da circuitaria hipocampal durante o ciclo sono-vigília do rato." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/47/47135/tde-08092010-144121/.

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Estrutura central do hipocampo, o corno de Ammon pode ser subdividido em pelo menos três áreas: CA1, CA2 e CA3. Enquanto CA1 e CA3 foram extensamente estudados, dado o envolvimento do hipocampo em processos cognitivos como a memória e patológicos como a epilepsia, CA2 tem sido largamente ignorado na literatura. Entretanto, este campo possui características específicas, tanto neuroanatômicas como bioquímicas e fisiológicas, sendo resistente à indução de plasticidade e recebendo aferência específica do núcleo supramamilar do hipotálamo, envolvido na circuitaria geradora/mantenedora do ritmo teta

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16

Guzzo, Lia Alves Simões Matuzaki [UNIFESP]. "Caracterização do padrão do ciclo vigília-sono, avaliado pela actimetria, em uma amostra da população da cidade de São Paulo." Universidade Federal de São Paulo (UNIFESP), 2010. http://repositorio.unifesp.br/handle/11600/9175.

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Made available in DSpace on 2015-07-22T20:49:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-07-28. Added 1 bitstream(s) on 2015-08-11T03:26:27Z : No. of bitstreams: 1 Publico-313a.pdf: 560141 bytes, checksum: 4035eb858e2cb05ef62cafc7f1e4f35e (MD5). Added 1 bitstream(s) on 2015-08-11T03:26:27Z : No. of bitstreams: 2 Publico-313a.pdf: 560141 bytes, checksum: 4035eb858e2cb05ef62cafc7f1e4f35e (MD5) Publico-313b.pdf: 2020262 bytes, checksum: 21e17092d7d10265944668be473ae2e0 (MD5)<br>Há poucos estudos que caracterizam o padrão do ciclo vigília-sono (CVS) na população geral, particularme

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Tang, Ni. "Circadian and non-visual regulation of light on sleep-wake states in humans and nocturnal rodents." Electronic Thesis or Diss., Lyon 1, 2024. http://www.theses.fr/2024LYO10356.

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La lumière influence de nombreuses fonctions comportementales et physiologiques, comme les cycles veille-sommeil, la sécrétion de mélatonine, le réflexe pupillaire et le métabolisme du glucose. En tant que facteur environnemental clé, elle synchronise le système circadien sur un cycle de 24 heures. Les signaux lumineux sont perçus par les cellules ganglionnaires rétiniennes intrinsèquement photosensibles (ipRGCs), distinctes des bâtonnets et cônes responsables de la vision. Ces ipRGCs envoient les informations lumineuses au noyau suprachiasmatique (NSC) de l'hypothalamus, l'horloge circadienne

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18

Melone, Marie-Anne. "Diagnοstic and therapeutic strategies οf circadian and sleep/wake rhythm disοrders in at-risk pοpulatiοns". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR023.

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Les recommandations en matière de santé du sommeil préconisent 7 à 9 heures de sommeil par nuit pour la population générale. Pourtant, la dette chronique de sommeil persiste et présente des risques importants pour la santé, notamment en termes de maladies métaboliques, cardiovasculaires et neurocognitives. Cette dette chronique de sommeil est souvent attribuée au conflit entre le mode de vie moderne - l'éclairage artificiel et les obligations sociales - et nos rythmes circadiens endogènes, ce qui conduit à une perturbation appelée le désalignement circadien. Les rythmes circadiens sont les osc

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19

Teixeira, Liliane Reis. "Análise dos padrões do ciclo vigília-sono de adolescentes trabalhadores e não trabalhadores, alunos de escola pública no município de São Paulo." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/6/6134/tde-28112006-183701/.

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Com o início da puberdade ocorrem modificações nos componentes biológicos do ciclo vigília-sono. Estes estão associados a fatores sociais, como os horários escolares, lazer e trabalho e podem reduzir as horas disponíveis para o sono. Foi objetivo principal deste trabalho avaliar os padrões do ciclo vigília-sono de estudantes trabalhadores e não trabalhadores, alunos de escola pública do município de São Paulo. Vinte e sete adolescentes entre 14-18 anos de idade responderam ao questionário de caracterização das condições de vida, saúde e trabalho, e simultaneamente, utilizaram actígrafos; preen

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20

Silva, Francisca Patricia da. "Avalia??o do padr?o do ciclo sono-vig?lia e a cogni??o em estudantes de medicina com diferentes esquemas de hor?rios de aulas." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17307.

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Made available in DSpace on 2014-12-17T15:37:01Z (GMT). No. of bitstreams: 1 FranciscaPS_DISSERT.pdf: 2124364 bytes, checksum: fdbee75aadf5fa6b72cf6cdc5f8aa5a8 (MD5) Previous issue date: 2010-10-07<br>The sleep patterns of students entering the university, is accompanied by many factors that can lead to changes in sleep habits, such as academic demands, new social opportunities, reduced parental care and irregular teaching schedules. The irregular pattern of sleep-wake cycle is usually accompanied by several daytime consequences, for example, reduced levels of motivation, performance, concen

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Teixeira, Liliane Reis. "Efeitos das atividades diárias nos níveis de sonolência, em estudantes do Ensino Médio, trabalhadores e não-trabalhadores." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/6/6134/tde-03042007-175137/.

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Introdução - A sonolência é descrita como a interação entre o momento circadiano para adormecer e o aumento da necessidade de sono, e está em geral, associada ao decréscimo do alerta, do tempo de reação, da memória, da coordenação psicomotora, do entendimento da informação, do tempo para se tomar decisões, da maior incidência de uso de substâncias estimulantes e de substâncias álcoolicas. Na adolescência, a sonolência limita as perspectivas dos adolescentes quanto ao seu desenvolvimento intelectual. Muito pouco se conhece sobre a percepção da sonolência em estudantes trabalhadores. Objetivo -

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22

Torres, Fernanda de Jesus. "Ciclo vigília/sono em adolescentes de uma população indígena." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/47/47135/tde-12062006-134852/.

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O ciclo vigília/sono (CVS) muda durante a adolescência. Nos dias letivos, há maior sonolência diurna e menor duração de sono do que nos finais de semana. Além disso, os adolescentes apresentam atraso da fase de sono. Acredita-se que essas mudanças resultam da interação entre fatores biológicos e ambientais. Neste trabalho, observamos o CVS de 21 jovens Guarani da Aldeia Boa Vista - SP, que vivem numa floresta, sem energia elétrica. Pretendíamos verificar se eles apresentam um padrão semelhante ao descrito em adolescentes urbanos ou se tal característica é menos evidente, como tem sido relatado

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23

Serpe, Rossana. "Identification of clock neurons and downstream circuits that are involved in sleep control in Drosophila melanogaster." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS257.

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Le moment, la qualité et la quantité de sommeil dépendent de l'interaction fine entre l'horloge circadienne et la machinerie homéostatique (Borbely A. et al., 1982, Daan S. et al., 1984, Borbely et Achermann, 1999). Au cours des dernières années, l'utilisation de divers organismes modèles a fourni de nouvelles perspectives sur les mécanismes neuronaux et moléculaires de la régulation du sommeil (Miyazaki S. et al., 2017). Cependant, les bases moléculaires de l'homéostasie du sommeil et les circuits neuronaux sous-jacents à son interaction avec le réseau circadien n'ont pas été établis en détai

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Barone, Mark Thomaz Ugliara. "Ciclo vigília/sono em portadores de diabetes mellitus tipo 1." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/42/42137/tde-23012012-164619/.

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O objetivo do presente estudo foi avaliar possíveis relações entre o diabetes mellitus tipo 1 (DM1) e controle glicêmico, e o ciclo vigília/sono. Participaram 18 voluntários com DM1 (idade: 26,3±5,1), sem complicações, não obesos, sem alterações no sono; e 9 no grupo controle (idade: 28,8±5,3). Os dados foram coletados através de: diário de sono e de glicemia, actímetria (Tempatilumi), polissonografia, 6-sulfatoximelatonina, questionário de Epworth, e sensor de glicose durante a polissonografia nos DM1. A associação entre controle glicêmico e o ciclo vigília/sono foi evidenciada. A duração ina

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Vasconcelos, Suleima Pedroza. "A organização temporal do trabalho e exposição à luz e suas repercussões no ciclo vigília-sono e secreção de melatonina de trabalhadores de uma reserva extrativista amazônica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/6/6134/tde-09022015-084121/.

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Objetivo Investigar a associação dos horários de trabalho e padrões de exposição à luz com ciclo vigília-sono e secreção de melatonina em trabalhadores da Reserva Extrativista Chico Mendes. Método Estudo transversal realizado no município de Xapuri, Acre, com 340 seringueiros e 148 trabalhadores uma fábrica de preservativos (46 trabalhadores administrativos e 102 operários). Na primeira etapa do estudo foram coletados, por meio de questionários, dados sociodemográficos, hábitos de vida, condições de trabalho, padrões de sono, preferência diurna, perfil cronobiológico (cronotipo), morbidades

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Tavares, Gracilene Rodrigues. "Funcionalidade em pacientes ap?s acidente vascular encef?lico: rela??o com o sono e ritmo de atividade-repouso." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16685.

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Made available in DSpace on 2014-12-17T15:16:09Z (GMT). No. of bitstreams: 1 GracileneRT_DISSERT.pdf: 1181628 bytes, checksum: 852f63bbbe08febda85d8edf419c5a92 (MD5) Previous issue date: 2010-08-27<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>It is known that sleep plays an important role in the process of motor learning. Recent studies have shown that the presence of sleep between training a motor task and retention test promotes a learning task so than the presence of only awake between training and testing. These findings also have been reported in stroke patients, ho

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Burgos, Leana Gonçalves Araujo. "Efeitos do trabalho noturno nos ritmos circadianos de marcadores do processo inflamatório." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/6/6134/tde-18112015-102240/.

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Introdução: Uma das reconhecidas consequências do trabalho noturno nos trabalhadores é a perda da ordem temporal interna, a qual resulta em alterações fisiopatológicas. Objetivo: O presente estudo teve o objetivo de avaliar os efeitos do turno noturno de traballho na concentração e no ritmo circadiano de citocinas inflamatórias de trabalhadores de linha de produção e operadores de máquinas. Material e Métodos: Estudo transversal realizado em uma empresa do setor de bebidas. Na Etapa 1 foram avaliados em 123 trabalhadores (56 do turno fixo diurno e 67 do turno fixo noturno), dados sociodemográf

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Souza, Jane Carla de. "Caracteriza??o do ciclo sono/vig?lia de professores do ensino m?dio em natal/rn." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17296.

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Made available in DSpace on 2014-12-17T15:36:59Z (GMT). No. of bitstreams: 1 JaneCS_DISSERT.pdf: 1336075 bytes, checksum: c5f6533c7142c09470c15e67f89d8cd4 (MD5) Previous issue date: 2010-05-04<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>In the school environment is fundamental the knowledge about the sleep-wake cycle (SWC), because we find children and adolescents with excessive sleepiness and learning difficulties. Furthermore, teachers with high demand and with different work schedule, which may contribute to changes in SWC. The aim of this study was to describe the

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Ghosh, Sagnik. "Les phéromones sexuelles redéfinissent les rythmes quotidiens d'activité et de repos des insectes." Electronic Thesis or Diss., université Paris-Saclay, 2025. http://www.theses.fr/2025UPASB007.

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Les cycles activité-repos sont des comportements conservés chez tous les animaux dotés d'un système nerveux, de l'hydre à l'homme. Le schéma temporel de ces cycles varie, rendant les animaux diurnes, nocturnes ou crépusculaires. Leur orchestration repose sur l'horloge circadienne, qui fonctionne sur une période de près de 24 heures et dicte les moments de sommeil et d'éveil. Des signaux abiotiques comme la lumière et la température ajustent quotidiennement ces rythmes. Ici, nous avons étudié si les interactions sociosexuelles cycliques pouvaient constituer un zeitgeber biotique puissant chez l

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Pegado, Jo?o Felipe de Souza. "Diferen?as de g?nero na produ??o de associa??es livres de palavras atrav?s do ciclo sono-vig?lia." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13389.

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Made available in DSpace on 2014-12-17T14:13:59Z (GMT). No. of bitstreams: 1 JoaoFSP_DISSERT.pdf: 3447270 bytes, checksum: 39c94faa709bc806d9f8e00564df8952 (MD5) Previous issue date: 2012-04-20<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Although several studies, have shown differences in cognitive performance between men and women, it not yet known whether these differences occur in tasks involving free association of words (WA). Studies across the sleep-wake cycle (SWC) suggest that rapid eye movement sleep (REM) favors semantic flexibility, in comparison with pre-sle

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Xavier, Rafaella Kaline Costa. "Rela??o entre o ciclo sono e vig?lia e a fun??o cardiorrespirat?ria em estudantes de medicina." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17309.

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Made available in DSpace on 2014-12-17T15:37:02Z (GMT). No. of bitstreams: 1 RafaellaKCX_DISSERT.pdf: 4153211 bytes, checksum: 487a3fa8cb1fb3468a4d19868f6701a0 (MD5) Previous issue date: 2010-10-08<br>Students, normally, present an irregular sleep pattern characterized by delays in sleep onset and offset from weekdays to weekends, short sleep duration on weekdays and long sleep duration on weekends. The reduction of the necessary sleep and the irregularity in the sleep patterns provoke relevant short- and long-term impairments on performances, for example, in cardiorespiratory function. The

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Bazilio, Darlan da Silva. "Avaliação de parâmetros cardiovasculares e respiratórios durante o ciclo sono-vigília de ratos submetidos à hipóxia crônica intermitente." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/17/17134/tde-23072018-102108/.

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A hipóxia crônica intermitente (HCI) é um modelo experimental no qual o quimiorreflexo é ativado a cada episódio de hipóxia, assim como em alguns casos de apneia obstrutiva do sono. A HCI promove aumento da atividade simpática, hipertensão e alterações no acoplamento simpático-respiratório no tronco encefálico. No presente trabalho estudamos os parâmetros cardiorrespiratórios concomitantemente com o ciclo sono-vigília em uma janela temporal de 3 horas no período do dia em que esses registros são feitos no nosso laboratório. Foram também registradas ao longo deste período as respostas cardiovas

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Fuchs, Fanny. "Impact des conditions d'hébergement sur le vieillissement cognitif chez le rat : études comportementales, électrophysiologiques et neurochimiques." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAJ077/document.

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Cette thèse avait pour but d’étudier dans quelle mesure l’enrichissement des conditions d’hébergement jusqu’à- ou à partir d’-un âge auquel les déficits cognitifs sont déjà présents contribue au maintien de la mémoire spatiale observé chez des rats âgés hébergés toute leur vie en environnement enrichi (EE), et d’étudier certains mécanismes neurobiologiques susceptibles de contribuer à cette préservation. Nous avons montré que l’hébergement en EE n’a pas besoin d’être maintenu jusqu’à la fin de la vie pour permettre la préservation des fonctions cognitives chez le Rat âgé. De plus, un enrichiss

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Maia, Ana Paula Le?o. "Efeito do exerc?cio f?sico matinal realizado sob luz solar no ciclo vig?lia-sono de adolescentes." Universidade Federal do Rio Grande do Norte, 2008. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17266.

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Made available in DSpace on 2014-12-17T15:36:53Z (GMT). No. of bitstreams: 1 AnaPLM.pdf: 607381 bytes, checksum: 38ed8ff61bb80d4aa7e083e73b98e3f8 (MD5) Previous issue date: 2008-06-04<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The sleep onset and offset delay at adolescence in relation to childhood. Besides biological causes, some external factors as academic obligations and socialization contributes, increasing the burden of school and socialization. However, morning school schedules reduce sleep duration. Besides light strong effect, studies in hum

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Aussel, Amélie. "Computational modeling of healthy and epileptic hippocampal oscillations." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0202.

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L'hippocampe peut présenter différents rythmes oscillatoires au cours du cycle veille-sommeil, chacun étant impliqué dans des processus cognitifs. Par exemple, des oscillations thêta-gamma sont produites pendant la veille et sont associés à la navigation spatiale et la mémoire à court terme, tandis que des complexes sharp-wave-ripples, produits durant les périodes de sommeil lent profond, jouent un rôle important dans la consolidation de la mémoire. Des modèles existent pour reproduire chacun de ces rythmes, cependant les mécanismes impliqués dans leur génération et les transitions entre eux n

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Cabanas, Magali. "Modification des activités de réseaux in vivo chez un modèle murin de la maladie de Huntington." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0345/document.

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La maladie de Huntington est une pathologie héréditaire qui se caractérise par une dégénérescence sélective des neurones striataux de la voie indirecte des ganglions de la base. Chez les patients ainsi que chez les souris modèles de la pathologie, en plus des symptômes moteurs, cognitifs et psychiatriques, des troubles du sommeil peuvent aussi apparaitre dès la phase pré-symptomatique. L’étude électrophysiologique in vivo des souris transgéniques R6/1a, en outre, révélé en début de phase symptomatique l’apparition du rythme pathologique β observé principalement durant le sommeil. Ces travaux d

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Clodore, Martine. "La vigilance : evolution circadienne et horaires de sommeil, importance de la typologie matin/soir." Paris 6, 1988. http://www.theses.fr/1988PA066153.

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Ribeiro, Jo?o Miguel Gon?alves. "Caracteriza??o do perfil do ciclo sono-vig?lia em ratos sob dessincroniza??o for?ada." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18487.

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Made available in DSpace on 2015-02-24T20:13:54Z (GMT). No. of bitstreams: 1 JoaoMGR_DISSERT.pdf: 11548329 bytes, checksum: b018f7ac6bfdefc0440cb7355ab6ae06 (MD5) Previous issue date: 2011-12-08<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>The circadian behavior associated with the 24 hours light-dark (LD) cycle (T24) is due to a circadian clock , which in mammals is located in the hypothalamic suprachiasmatic nucleus (SCN). Under experimental conditions in which rats are espoused to a symmetric LD 22h cycle (T22) the two SCN regions, ventrolateral (vl) and dorsomedia

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Nguyen, John Loc. "The effects of reversing sleep-wake cycles on sleep and fatigue on the crew of USS John C. Stennis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FNguyen.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, September 2002.<br>Thesis advisor(s): Nita L. Miller, Samuel E. Buttrey, Susan M. Sanchez. Includes bibliographical references (p. 147-149). Also available online.

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Tosun, Pinar Deniz. "Analysis of brain activity during the sleep-wake cycles of rodents and humans with symbolic dynamic analysis of the electroencephalogram." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/846155/.

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Sleep is an essential physiological phenomenon which is regulated by fundamental sleep-wake cycles. Sleep is formed of non-rapid-eye-movement (NREM) and REM stages where NREM and REM sleep stages alternate with wakefulness in a whole night sleep (i.e., typically consists of several sleep-wake cycles). During sleep, brain is active and the activity also alters with changing vigilance states (VS). Furthermore, physiological or external changes in the brain structure might influence brain activity during sleep. Effects of ageing, sex differences, and pharmacological manipulations have been widely

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Singletary, Kristan Gail. "Nocturnal bird migration and disrupted sleep/wake cycle." 2009. http://hdl.handle.net/2152/6637.

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In most birds, changing photoperiods from winter to spring and from summer to fall have two consequences: increased feeding followed by migratory activity. To date, the neural system controlling the activation of migratory activity remains unknown, though behavioral observations point to a possible mechanism. During the migration season, diurnal songbirds show extensive disruption of their sleep/wake cycle, sleeping during the day and flying at night. In mammals, similarly altered cycles of activity result from blocking orexin expression in the hypothalamus. It is possible that decreased orexi

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Evans, Barbara Duffy. "Wrist-actigraphic assessment of 24 hour sleep-wake patterns in the community elderly a research project submitted in partial fulfillment ... Master of Science (Gerontological Nursing) /." 1990. http://catalog.hathitrust.org/api/volumes/oclc/68795153.html.

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Mir, Saba. "Noradrenergic modulation of airway-related muscle activity across the sleep-wake cycle." 2006. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=450436&T=F.

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Wang, Yi-Ping, and 王奕評. "Effects of Sleep-wake Cycle and Circadian Rhythm on Blood Pressure Dipping in Rats." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/48338091244556072846.

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碩士<br>國立陽明大學<br>腦科學研究所<br>99<br>Background: 24 h ambulatory blood pressure (BP) monitoring present BP dipping pattern during sleep in healthy subject. The extent of the BP decline is highly correlation with target organ damage (TOD) and cardiovascular disease. Circadian rhythm and sleep-wake cycle are the two factors causing BP dipping. Autonomic nervous system plays a major role in BP regulation and sleep cycle change. Aims: Building a BP dipping animal model, which is useful for studying the mechanism of BP dipping. Hypothesis: We hypothesis that Wistar-Kyoto rats (WKY) and spontaneously hyp

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Lee, Pei-ying, and 李佩穎. "The Effects of Light/dark Cycle Change on Sleep/wake Related Cardiac Autonomic Functions in Rats." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/24804956425652300375.

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碩士<br>慈濟大學<br>神經科學研究所<br>94<br>Many evidences had provided important links among circadian rhythm disorder and/or sleep disorder and essential hypertension. However, the interactions between circadian rhythm and sleep stages on cardiac autonomic functions remain unclear. This study was designed to investigate the autonomic differences of sleep stages between light and dark period in spontaneously hypertensive (SHR) and Wistar-Kyoto rats (WKY), and whether there were any differences between SHR and WKY throughout a day. All WKY and SHR had electrodes implanted for polygraphic recordings. One we

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Hagar, Kristine Ann. "The effect of physical activity on sleep in children with autism." 2005. http://www.oregonpdf.org.

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Bernert, Rebecca A. "A circadian vulnerability for depression eveningness and sleep variability /." Diss., 2005. http://etd.lib.fsu.edu/theses/available/etd-11142005-112652.

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Thesis (M.S.)--Florida State University, 2005.<br>Advisor: James Joiner, Florida State University, College of Arts and Sciences, Dept. of Psychology. Title and description from dissertation home page (viewed Feb.1, 2006). Document formatted into pages; contains vi, 23 pages. Includes bibliographical references.

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Roach, Gregory D. "Circadian disruption and adaptation associated with night work and transmeridian flight." 2001. http://arrow.unisa.edu.au:8081/1959.8/24974.

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Shiftwork, particularly that involving night work and/or transmeridian flight, forces a mismatch between the sleep/wake cycle and the endogenous circadian timing system. Specifically, shiftworkers are often required to sleep at a phase in the circadian cycle when they would usually be active, and to work at a phase in the circadian cycle when they would usually be asleep. The current thesis describes a series of five studies designed to examine the disruption and adaptation associated with shiftwork, with an emphasis on night work and, to a lesser extent, transmeridian flight. The first s

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Dostie, Valérie. "Impact de l’âge sur les effets de la caféine sur la vigilance chez les sujets jeunes et d’âge moyen." Thèse, 2012. http://hdl.handle.net/1866/8514.

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La grande disponibilité et les propriétés psychostimulantes de la caféine en font l’un des psychostimulants les plus consommés mondialement. Sa capacité à augmenter la vigilance serait reliée à son action antagoniste des récepteurs adénosinergiques. Le vieillissement s'accompagne de changements dans les mécanismes de régulation de la vigilance, y compris le système adénosinergique, qui pourraient moduler les effets de la caféine. Alors que plusieurs études ont investigué les impacts de la caféine sur la vigilance chez une population jeune, peu ont identifié les effets chez une population plus

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Becker, Ann. "Environmental impact on infant's developing melatonin levels and sleep -wake cycles." 2001. https://scholarworks.umass.edu/dissertations/AAI3012112.

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The purpose of the study is to describe the development of infant melatonin levels form birth to six months, and to examine the effects of seasonal luminosity, and nutrition on the development of melatonin levels and changes in circadian sleep:wake cycles. Additionally the study will investigate the role of infant, maternal and care giving variables on the development of infant sleep. This longitudinal study will be conducted in Tromso, Norway, which, because of its far northern location (70° North), provides extremes in seasonal variations and light/dark cycles. For two months in the Winter t

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