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Journal articles on the topic 'Olfactory bulb'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Kokoreva, K. D., I. S. Chugunov, V. P. Vladimirova, T. E. Ivannikova, V. P. Bogdanov, and O. B. Bezlepkina. "Olfactory function and olfactory bulbs in patients with Kallmann syndrome." Problems of Endocrinology 69, no. 2 (2023): 67–74. http://dx.doi.org/10.14341/probl13216.

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BACKGROUND: The majority of Kallmann patients have anosmia or hyposmia. This is how the disease is diagnosed. Some of them don’t have such complaints but olfactory dysfunction is diagnosed via olfactometry. Nowadays there is the lack of information about correlation between olfactometry results and subjective complaints. Correlation between olfactory bulbs size and olfactory dysfunction has been little studied.AIM: To explore olfactory bulb size and olfactory function in patients with congenital isolated hypogonadotropic hypogonadism. To correlate olfactory bulb sizes and smell test scores.MAT

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2

Jiang, Rong-San, and Yu-Yu Lu. "Functional Olfactory Nerve Regeneration Demonstrated by Thallium-201 Olfacto-Scintigraphy in Patients with Traumatic Anosmia: A Case Report." Case Reports in Otolaryngology 2019 (November 16, 2019): 1–7. http://dx.doi.org/10.1155/2019/1069741.

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Head trauma is one of the most common etiologies of olfactory dysfunction. It is difficult to use either the olfactory function test or magnetic resonance imaging to directly assess the course of damage to olfactory nerves. Thallium-201 (201Tl) olfacto-scintigraphy has been shown to be an able means for objectively assessing the olfactory nerve transport function. It is expected to be used to evaluate olfactory nerve regeneration after damage to the olfactory nerves. However, no such result has been reported. We present a patient who lost his olfactory function after experiencing head trauma.

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3

Qasem sami jawad and Khayria K. Habeeb. "HISTOLOGICAL STUDY OF THE OLFACTORY BULLB IN CATS." University of Thi-Qar Journal of agricultural research 13, no. 1 (2024): 166–75. http://dx.doi.org/10.54174/utjagr.v13i1.283.

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The current study was carried out to investigate histological features of olfactory bulb were observed in cats, 12 samples (n = 12) were used. six samples for anatomical observation of olfactory bulb were record in adult cats which involved the morphological study (position, relation, weight, length and diameter), he length of the olfactory bulb was of greatest value in cats (19.5 ±0.72). The greatest width (diameter) of olfactory bulb relative to that of the corresponding cerebral hemisphere gave the highest ratio in the cats (41.92%), The olfactory bulbs were Fixed in 10% formalin solution t

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Schwob, James E., Donald A. Leopold, Karen E. Mieleszko Szumowski, and Precha Emko. "Histopathology of Olfactory Mucosa in Kallmann's Syndrome." Annals of Otology, Rhinology & Laryngology 102, no. 2 (1993): 117–22. http://dx.doi.org/10.1177/000348949310200208.

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Olfactory mucosa was harvested by intranasal biopsy from a man with Kallmann's syndrome in whom the absence of the olfactory bulbs was documented by magnetic resonance imaging. On electron microscopic examination, several pathologic changes were evident in the olfactory mucosa. First, most olfactory neurons lacked cilia (ie, were morphologically immature). Second, the fila olfactoria had fewer than the normal number of axons, and a large proportion of them were apparently undergoing electron lucent degeneration. Finally, neuromatous collections of axons were seen superficial to the basement me

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5

Becerra, N. Navarro, та N. I. Munaro. "γ-Aminobutyric acid activity in the olfactory bulb of the rat during the sexual cycle and response to olfactory stimuli". Canadian Journal of Physiology and Pharmacology 70, № 6 (1992): 922–25. http://dx.doi.org/10.1139/y92-124.

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Glutamic acid decarboxylase activity in the main and accessory olfactory bulbs throughout the sexual cycle of the rat was studied. The effect of male pheromonal secretion on enzyme activity during proestrus and estrus day was also tested. The enzyme activity showed circadian rhythm during the estrous cycle. This rhythm was disrupted during diestrus-2 afternoon in the main bulb and came back during proestrus afternoon. A different pattern of enzyme activity was present in the accessory bulb, since the circadian rhythm was altered during proestrus morning, returning during estrus afternoon. Male

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6

Dell’Aquila, Marco, Concetta Cafiero, Alessandra Micera, et al. "SARS-CoV-2-Related Olfactory Dysfunction: Autopsy Findings, Histopathology, and Evaluation of Viral RNA and ACE2 Expression in Olfactory Bulbs." Biomedicines 12, no. 4 (2024): 830. http://dx.doi.org/10.3390/biomedicines12040830.

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Background: The COVID-19 pandemic has been a health emergency with a significant impact on the world due to its high infectiousness. The disease, primarily identified in the lower respiratory tract, develops with numerous clinical symptoms affecting multiple organs and displays a clinical finding of anosmia. Several authors have investigated the pathogenetic mechanisms of the olfactory disturbances caused by SARS-CoV-2 infection, proposing different hypotheses and showing contradictory results. Since uncertainties remain about possible virus neurotropism and direct damage to the olfactory bulb

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Sarnat, Harvey B., and Laura Flores-Sarnat. "Olfactory Development, Part 2: Neuroanatomic Maturation and Dysgeneses." Journal of Child Neurology 32, no. 6 (2017): 579–93. http://dx.doi.org/10.1177/0883073816685192.

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Olfactory axons project from nasal epithelium to the primitive telencephalon before olfactory bulbs form. Olfactory bulb neurons do not differentiate in situ but arrive via the rostral migratory stream. Synaptic glomeruli and concentric laminar architecture are unlike other cortices. Fetal olfactory maturation of neuronal differentiation, synaptogenesis, and myelination remains incomplete at term and have a protracted course of postnatal development. The olfactory ventricular recess involutes postnatally but dilates in congenital hydrocephalus. Olfactory bulb, tract and epithelium are reposito

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8

Cornejo-Montes-de-Oca, José M., Rebeca Hernández-Soto, Arturo G. Isla, Carlos E. Morado-Urbina та Fernando Peña-Ortega. "Tolfenamic Acid Prevents Amyloid β-induced Olfactory Bulb Dysfunction In Vivo". Current Alzheimer Research 15, № 8 (2018): 731–42. http://dx.doi.org/10.2174/1567205015666180223091233.

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Background: Amyloid beta inhibits olfactory bulb function. The mechanisms involved in this effect must include alterations in network excitability, inflammation and the activation of different transduction pathways. Thus, here we tested whether tolfenamic acid, a drug that modulates several of these pathological processes, could prevent amyloid beta-induced olfactory bulb dysfunction. Objective: To test whether tolfenamic acid prevents amyloid beta-induced alterations in olfactory bulb network function, olfaction and GSK3β activity. Method: The protective effects of tolfenamic acid against amy

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9

Alvites, Rui, Abby Caine, Giunio Bruto Cherubini, Artur Severo P. Varejão, and Ana Colette Maurício. "Preliminary Findings on the Morphometric Characteristics of the Olfactory Bulb in the Cat." Animals 14, no. 24 (2024): 3590. https://doi.org/10.3390/ani14243590.

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The aim of this preliminary study was to morphologically and dimensionally characterize the cat’s olfactory bulb in the sagittal plane and to establish potential relationships with the cranial conformation, based on the study of in vivo MRI images. Midsagittal and transverse T2-weighted images of the head of 40 cats subjected to MRI were selected. For each animal, the skull index was calculated to classify the cranial conformation. Then, for the olfactory bulb, the angle was calculated, the orientation was determined, and the sagittal section area was measured. It was established that animals

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10

Doğan, A., N. Bayar Muluk, N. Asal, et al. "Olfactory bulb volume and olfactory sulcus depth in patients with Behçet's disease." Journal of Laryngology & Otology 132, no. 12 (2018): 1088–92. http://dx.doi.org/10.1017/s0022215118002141.

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AbstractObjectiveTo investigate olfactory bulb volume and olfactory sulcus depth in patients with Behçet's disease, using magnetic resonance imaging.MethodsCranial magnetic resonance imaging scans of 27 adults with Behçet's disease (10 males and 17 females) and 27 healthy controls were examined. Olfactory bulb volume and olfactory sulcus depth were measured on coronal, T2-weighted, spectral pre-saturation with inversion recovery sequences.ResultsBilateral olfactory bulb volume and right-sided olfactory sulcus depth were significantly lower in the Behçet's disease group than in the control grou

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11

Varentsov, V. E., T. A. Rumyanceva, and T. S. Myasishcheva. "Distribution of nadph-diaphorase positive structures of olfactory bulb of rats in ontogenesis." I.P. Pavlov Russian Medical Biological Herald 26, no. 1 (2018): 5–20. http://dx.doi.org/10.23888/pavlovj201815-20.

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Aim: to identify peculiarities of distribution of NADPH-diaphorase (NADPH-d) positive structures in olfactory bulbs of rats of different age. Materials and Methods. The study was conducted on 22 white male rats. The object of research was olfactory bulbs of newborn rats – 1-3 days, suckling period – 7, 14, 21 days, infantile – 30 days, juvenile – 60, and mature – 180 days. The study was conducted on cryostat serial sections of olfactory bulbs (20 µm). Nitroxidergic structures were identified by histochemical labelling of NADPH-d (by Hope method). In a standard section, the area of NADPH-

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12

Varentsov, V. E., T. A. Rumyanceva, and T. S. Myasishcheva. "Distribution of nadph-diaphorase positive structures of olfactory bulb of rats in ontogenesis." I.P. Pavlov Russian Medical Biological Herald 26, no. 1 (2018): 5–20. http://dx.doi.org/10.23888/pavlovj20182615-20.

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Aim: to identify peculiarities of distribution of NADPH-diaphorase (NADPH-d) positive structures in olfactory bulbs of rats of different age. Materials and Methods. The study was conducted on 22 white male rats. The object of research was olfactory bulbs of newborn rats – 1-3 days, suckling period – 7, 14, 21 days, infantile – 30 days, juvenile – 60, and mature – 180 days. The study was conducted on cryostat serial sections of olfactory bulbs (20 µm). Nitroxidergic structures were identified by histochemical labelling of NADPH-d (by Hope method). In a standard section, the area of NADPH-

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13

Zigova, T., P. P. C. Graziadei, and A. G. Monti Graziadei. "Olfactory bulb transplantation into the olfactory bulb of neonatal rats." Brain Research 513, no. 2 (1990): 315–19. http://dx.doi.org/10.1016/0006-8993(90)90473-o.

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14

Kang, J., and J. Caprio. "Electrophysiological responses of single olfactory bulb neurons to amino acids in the channel catfish, Ictalurus punctatus." Journal of Neurophysiology 74, no. 4 (1995): 1421–34. http://dx.doi.org/10.1152/jn.1995.74.4.1421.

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1. Responses of 89 single olfactory bulb neurons from 43 channel catfish, Ictalurus punctatus, to amino acid odorants were recorded in vivo simultaneously with the electro-olfactogram (EOG). Recording time for individual neurons ranged from 16 to 344 min. The averaged spontaneous frequency ranged from x003C; 1 to 16 action potentials/s with a mean frequency of 5.2 +/- 3.6 (SD) action potentials/s. 2. Histological examinations of carbocyanine dye 1,1'diocadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI)-labeled olfactory bulbs and electrical stimulation of the olfactory tracts in a

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15

Ilyukha, L. M. "Dynamics of Electrical Activity of Olfactory Structures under Conditions of Calypsol / Ketamine Anesthesia." CHERKASY UNIVERSITY BULLETIN: BIOLOGICAL SCIENCES SERIES, no. 2 (2021): 37–47. http://dx.doi.org/10.31651/2076-5835-2018-1-2021-2-37-47.

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Introduction. In this study, we have characterized high-frequency and low-frequency oscillations at several stages of olfactory processing under calypsol anesthesia in albino rats. While monitoring the animal's respiration, we also obtained field potentials from the olfactory bulb and piriform (olfactory) cortex and simultaneously recorded membrane potentials in piriform cortex pyramidal cells. Manifestations of the considered specific high-frequency components of electrical activity of rhinencephaly structures, in particular olfactory-amygdala rhythm and high-frequency synchronized activity,

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16

Brann, David H., Tatsuya Tsukahara, Caleb Weinreb, et al. "Non-neuronal expression of SARS-CoV-2 entry genes in the olfactory system suggests mechanisms underlying COVID-19-associated anosmia." Science Advances 6, no. 31 (2020): eabc5801. http://dx.doi.org/10.1126/sciadv.abc5801.

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Abstract:Altered olfactory function is a common symptom of COVID-19, but its etiology is unknown. A key question is whether SARS-CoV-2 (CoV-2) – the causal agent in COVID-19 – affects olfaction directly, by infecting olfactory sensory neurons or their targets in the olfactory bulb, or indirectly, through perturbation of supporting cells. Here we identify cell types in the olfactory epithelium and olfactory bulb that express SARS-CoV-2 cell entry molecules. Bulk sequencing demonstrated that mouse, non-human primate and human olfactory mucosa expresses two key genes involved in CoV-2 entry, ACE2

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17

Gourévitch, Boris, Leslie M. Kay, and Claire Martin. "Directional Coupling From the Olfactory Bulb to the Hippocampus During a Go/No-Go Odor Discrimination Task." Journal of Neurophysiology 103, no. 5 (2010): 2633–41. http://dx.doi.org/10.1152/jn.01075.2009.

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The hippocampus and olfactory regions are anatomically close, and both play a major role in memory formation. However, the way they interact during odor processing is still unclear. In both areas, strong oscillations of the local field potential (LFP) can be recorded, and are modulated by behavior. In particular, in the olfactory system, the beta rhythm (15–35 Hz) is associated with cognitive processing of an olfactory stimulus. Using LFP recordings in the olfactory bulb and dorsal and ventral hippocampus during performance of an olfactory go/no-go task in rats, we previously showed that beta

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18

Sarnat, Harvey B., Laura Flores-Sarnat, and Xing-Chang Wei. "Olfactory Development, Part 1: Function, From Fetal Perception to Adult Wine-Tasting." Journal of Child Neurology 32, no. 6 (2017): 566–78. http://dx.doi.org/10.1177/0883073817690867.

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Discrimination of odorous molecules in amniotic fluid occur after 30 weeks’ gestation; fetuses exhibit differential responses to maternal diet. Olfactory reflexes enable reliable neonatal testing. Olfactory bulbs can be demonstrated reliably by MRI after 30 weeks’ gestation, and their hypoplasia or aplasia also documented by late prenatal and postnatal MRI. Olfactory axons project from nasal epithelium to telencephalon before olfactory bulbs form. Fetal olfactory maturation remains incomplete at term for neuronal differentiation, synaptogenesis, myelination, and persistence of the transitory f

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19

Shiga, Hideaki, Hiroshi Wakabayashi, Kohshin Washiyama, et al. "Thallium-201 Imaging in Intact Olfactory Sensory Neurons with Reduced Pre-Synaptic Inhibition In Vivo." Molecular Neurobiology 57, no. 12 (2020): 4989–99. http://dx.doi.org/10.1007/s12035-020-02078-y.

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Abstract In this study, we determined whether the 201Tl (thallium-201)-based olfactory imaging is affected if olfactory sensory neurons received reduced pre-synaptic inhibition signals from dopaminergic interneurons in the olfactory bulb in vivo. The thallium-201 migration rate to the olfactory bulb and the number of action potentials of olfactory sensory neurons were assessed 3 h following left side nasal administration of rotenone, a mitochondrial respiratory chain complex I inhibitor that decreases the number of dopaminergic interneurons without damaging the olfactory sensory neurons in the

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20

Inokuchi, Akira, Thomas V. Boran, Charles P. Kimmelman, and James B. Snow. "Effects of Locus Ceruleus and Olfactory Bulb Stimulation on Rat Olfactory Tubercle Neuron Activity." Otolaryngology–Head and Neck Surgery 98, no. 2 (1988): 116–20. http://dx.doi.org/10.1177/019459988809800204.

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The effects of electrical stimulation of the olfactory bulb and the locus ceruleus on olfactory tubercle neurons were examined in rat models. Ipsilateral stimulation of the olfactory bulb produced excitation in 31% of olfactory tubercle neurons tested and inhibition in 17%. Twenty-two percent of the olfactory tubercle neurons were excited, whereas 9% were inhibited by ipsilateral stimulation of the locus ceruleus. Contralateral stimulation of the locus ceruleus produced similar responses in the same neuron entities. A negative-positive evoked potential was recorded in the olfactory tubercle af

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Zhu, Ping, Yulan Tian, Yating Chen, et al. "Olfactory Optogenetics: Light Illuminates the Chemical Sensing Mechanisms of Biological Olfactory Systems." Biosensors 11, no. 9 (2021): 309. http://dx.doi.org/10.3390/bios11090309.

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The mammalian olfactory system has an amazing ability to distinguish thousands of odorant molecules at the trace level. Scientists have made great achievements on revealing the olfactory sensing mechanisms in decades; even though many issues need addressing. Optogenetics provides a novel technical approach to solve this dilemma by utilizing light to illuminate specific part of the olfactory system; which can be used in all corners of the olfactory system for revealing the olfactory mechanism. This article reviews the most recent advances in olfactory optogenetics devoted to elucidate the mecha

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Hoyk, Zsofia, Eszter Csakvari, Andrea Gyenes, Laszlo Siklos, Nobuhiro Harada, and Arpad Parducz. "Aromatase and estrogen receptor beta expression in the rat olfactory bulb: Neuroestrogen action in the first relay station of the olfactory pathway?" Acta Neurobiologiae Experimentalis 74, no. 1 (2014): 1–14. http://dx.doi.org/10.55782/ane-2014-1967.

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The expression pattern of aromatase (ARO), the enzyme converting androgens to estrogens, was analyzed in the olfactory bulb of adult male rats and was compared with the distribution of estrogen receptor beta (ERbeta), the main estrogen receptor isoform expressed in this brain region. A strong ARO immunolabeling obtained with a specificity tested antibody was observed in juxtaglomerular neurons of the glomerular layer and a weaker immunoreaction was detected in the mitral cell layer of the main olfactory bulb, while the granule cell layer of the main olfactory bulb as well as all layers in the

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Garcia, Benjamin J., Aurora Kraus, and Irene Salinas. "Peripheral viral detection induces an antimicrobial program in olfactory bulb immature neurons." Journal of Immunology 210, no. 1_Supplement (2023): 61.23. http://dx.doi.org/10.4049/jimmunol.210.supp.61.23.

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Abstract The immune and nervous systems have co-evolved to sense and eliminate danger. Neuroimmune interactions occur bidirectionally between the periphery and the central nervous system (CNS) in physiological and disease states. In the olfactory periphery, olfactory sensory neurons (OSNs) are exposed to environmental pathogens and project their axons onto the olfactory bulb. Previous studies have shown that the olfactory bulb participates in the immune response when a pathogen directly invades the CNS. We hypothesize that immune responses occur in the olfactory bulb in response to peripheral

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Sarnat, Harvey B. "8. Maturation of the Fetal Olfactory Bulb." Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 42, S2 (2015): S4. http://dx.doi.org/10.1017/cjn.2015.256.

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The olfactory bulb exhibits architecture unique amongst laminar cortices, lacking molecular and subplate zones and having superficial synaptic glomeruli. Its ontogenesis also is unique because neuroblasts do not migrate radially but stream in from the rostral telencephalon; an ependymal-lined olfactory ventricle is transitory. The olfactory is the only sensory system to not project to the thalamus but incorporates a thalamic equivalent. It is a repository of progenitor cells in the mature brain. The aim was to define olfactory bulb development in the human foetus: synaptogenesis and cellular m

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25

Leon, Michael, and Brett A. Johnson. "Olfactory coding in the mammalian olfactory bulb." Brain Research Reviews 42, no. 1 (2003): 23–32. http://dx.doi.org/10.1016/s0165-0173(03)00142-5.

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26

Mori, K. "Grouping of odorant receptors: odour maps in the mammalian olfactory bulb." Biochemical Society Transactions 31, no. 1 (2003): 134–36. http://dx.doi.org/10.1042/bst0310134.

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The olfactory system is unique in that the sensory input is in the form of molecular information carried in a vast variety of odorants. Nearly 1000 types of odorant receptors mediate the initial detection and discrimination of odorants at the molecular-feature level. The discrimination at the molecular level is converted into that at the cellular level (olfactory sensory neurons) by the one sensory neuron–one odorant receptor rule, and then into that at the neuronal circuit level in the olfactory bulb by the specific olfactory axon connectivity pattern. Individual glomeruli in the olfactory bu

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Lledo, Pierre-Marie, and Matt Valley. "Adult Olfactory Bulb Neurogenesis." Cold Spring Harbor Perspectives in Biology 8, no. 8 (2016): a018945. http://dx.doi.org/10.1101/cshperspect.a018945.

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Blanchart, A., E. Martín-López, J. A. De Carlos, and L. López-Mascaraque. "Peripheral contributions to olfactory bulb cell populations (migrations towards the olfactory bulb)." Glia 59, no. 2 (2010): 278–92. http://dx.doi.org/10.1002/glia.21100.

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Rombaux, Philippe, André Mouraux, Bernard Bertrand, Thierry Duprez, and Thomas Hummel. "Can we Smell without an Olfactory Bulb?" American Journal of Rhinology 21, no. 5 (2007): 548–50. http://dx.doi.org/10.2500/ajr.2007.21.3067.

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Background Lack of an olfactory bulb (OB) is typically associated with anosmia. Methods We present a patient with subnormal olfactory function in whom the OB could not be detected with magnetic resonance imaging (MRI). Results Olfactory function was evaluated on two occasions. Orthonasal olfactory function was assessed with the “Sniffin’ Sticks” test providing a score equivalent to hyposmia. Retronasal olfactory function was studied with “smell powders” indicating a decreased, but not absence of, olfactory function. Importantly, chemosensory event-related potentials were clearly present in res

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Saw, Chia, Noel David Friesen, and Anthony Bartley. "An Extremely Rare Cause of Isolated Congenital Anosmia." Case Reports in Otolaryngology 2022 (July 7, 2022): 1–5. http://dx.doi.org/10.1155/2022/9692716.

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A 14-year-old adolescent was referred to a regional paediatric outpatient clinic with anosmia by her family doctor in Western Australia. The patient has no recollection of her previous ability to smell, suggesting the possibility of congenital anosmia. She was assessed in the paediatric outpatient clinic. A “noncontrast high-resolution MRI-brain scan with Anosmia-Protocol” was requested as the first-line investigation of choice by the treating paediatrician. The MRI was reported as “absence of olfactory tracts with preserved olfactory bulb volume.” We report an extremely rare case of “isolated

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Alvites, Rui, Abby Caine, Giunio Bruto Cherubini, Justina Prada, Artur Severo P. Varejão, and Ana Colette Maurício. "The Olfactory Bulb in Companion Animals—Anatomy, Physiology, and Clinical Importance." Brain Sciences 13, no. 5 (2023): 713. http://dx.doi.org/10.3390/brainsci13050713.

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The Olfactory Bulb is a component of the Olfactory System, in which it plays an essential role as an interface between the peripheral components and the cerebral cortex responsible for olfactory interpretation and discrimination. It is in this element that the first selective integration of olfactory stimuli occurs through a complex cell interaction that forwards the received olfactory information to higher cortical centers. Considering its position in the organizational hierarchy of the olfactory system, it is now known that changes in the Olfactory Bulb can lead to olfactory abnormalities. T

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Yoon, Younghyun, SuHyun Kim, YunHee Seol, et al. "Increases of Phosphorylated Tau (Ser202/Thr205) in the Olfactory Regions Are Associated with Impaired EEG and Olfactory Behavior in Traumatic Brain Injury Mice." Biomedicines 10, no. 4 (2022): 865. http://dx.doi.org/10.3390/biomedicines10040865.

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Traumatic brain injury (TBI) leads to long-term cognitive impairments, with an increased risk for neurodegenerative and psychiatric disorders. Among these various impairments, olfactory dysfunction is one of the most common symptoms in TBI patients. However, there are very few studies that show the association between olfactory dysfunction and repetitive TBI. To investigate the effects of repetitive TBI on olfactory functioning and the related pathological neuronal injuries in mice, we applied a weight-drop model of TBI and performed neuropathological examinations and electroencephalography (E

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Sánchez-González, Rebeca, María Figueres-Oñate, Ana Cristina Ojalvo-Sanz, and Laura López-Mascaraque. "Cell Progeny in the Olfactory Bulb after Targeting Specific Progenitors with Different UbC-StarTrack Approaches." Genes 11, no. 3 (2020): 305. http://dx.doi.org/10.3390/genes11030305.

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The large phenotypic variation in the olfactory bulb may be related to heterogeneity in the progenitor cells. Accordingly, the progeny of subventricular zone (SVZ) progenitor cells that are destined for the olfactory bulb is of particular interest, specifically as there are many facets of these progenitors and their molecular profiles remain unknown. Using modified StarTrack genetic tracing strategies, specific SVZ progenitor cells were targeted in E12 mice embryos, and the cell fate of these neural progenitors was determined in the adult olfactory bulb. This study defined the distribution and

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Weiss, Lukas, Paola Segoviano Arias, Thomas Offner, Sara Joy Hawkins, Thomas Hassenklöver, and Ivan Manzini. "Distinct interhemispheric connectivity at the level of the olfactory bulb emerges during Xenopus laevis metamorphosis." Cell and Tissue Research 386, no. 3 (2021): 491–511. http://dx.doi.org/10.1007/s00441-021-03527-3.

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AbstractDuring metamorphosis, the olfactory system of anuran tadpoles undergoes substantial restructuring. The main olfactory epithelium in the principal nasal cavity of Xenopus laevis tadpoles is associated with aquatic olfaction and transformed into the adult air-nose, while a new adult water-nose emerges in the middle cavity. Impacts of this metamorphic remodeling on odor processing, behavior, and network structure are still unexplored. Here, we used neuronal tracings, calcium imaging, and behavioral experiments to examine the functional connectivity between the epithelium and the main olfa

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Radtke, Christine, Masanori Sasaki, Karen L. Lankford, Vittorio Gallo, and Jeffery D. Kocsis. "CNPase Expression in Olfactory Ensheathing Cells." Journal of Biomedicine and Biotechnology 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/608496.

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A large body of work supports the proposal that transplantation of olfactory ensheathing cells (OECs) into nerve or spinal cord injuries can promote axonal regeneration and remyelination. Yet, some investigators have questioned whether the transplanted OECs associate with axons and form peripheral myelin, or if they recruit endogenous Schwann cells that form myelin. Olfactory bulbs from transgenic mice expressing the enhanced green fluorescent protein (eGFP) under the control of the 2-3-cyclic nucleotide 3-phosphodiesterase (CNPase) promoter were studied. CNPase is expressed in myelin-forming

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Lerner-Natoli, M., G. Rondouin, and A. Privat. "Olfactory bulb kindling in rats after specific lesions of olfactory bulb serotoninergic terminals." Electroencephalography and Clinical Neurophysiology 61, no. 3 (1985): S53. http://dx.doi.org/10.1016/0013-4694(85)90231-7.

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Zigova, T., P. P. C. Graziadei, and A. G. Monti Graziadei. "Olfactory bulb transplantation into the olfactory bulb of neonatal rats: an autoradiographic study." Brain Research 539, no. 1 (1991): 51–58. http://dx.doi.org/10.1016/0006-8993(91)90685-o.

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Pérez de los Cobos Pallarés, Fernando, Davor Stanić, David Farmer, Mathias Dutschmann, and Veronica Egger. "An arterially perfused nose-olfactory bulb preparation of the rat." Journal of Neurophysiology 114, no. 3 (2015): 2033–42. http://dx.doi.org/10.1152/jn.01048.2014.

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A main feature of the mammalian olfactory bulb network is the presence of various rhythmic activities, in particular, gamma, beta, and theta oscillations, with the latter coupled to the respiratory rhythm. Interactions between those oscillations as well as the spatial distribution of network activation are likely to determine olfactory coding. Here, we describe a novel semi-intact perfused nose-olfactory bulb-brain stem preparation in rats with both a preserved olfactory epithelium and brain stem, which could be particularly suitable for the study of oscillatory activity and spatial odor mappi

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Christen-Zaech, S., R. Kraftsik, O. Pillevuit, et al. "Early Olfactory Involvement in Alzheimer’s Disease." Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 30, no. 1 (2003): 20–25. http://dx.doi.org/10.1017/s0317167100002389.

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Background:In Alzheimer’s disease (AD) the olfactory system, including the olfactory bulb, a limbic paleocortex is severely damaged. The occurrence of early olfactory deficits and the presence of senile plaques and neurofibrillary tangles in olfactory bulb were reported previously by a few authors. The goal of the present study was to analyze the occurrence of AD-type degenerative changes in the peripheral part of the olfactory system and to answer the question whether the frequency and severity of changes in the olfactory bulb and tract are associated with those of the cerebral cortex in AD.M

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Yagi, Sayaka, and Richard M. Costanzo. "Grafting the Olfactory Epithelium to the Olfactory Bulb." American Journal of Rhinology & Allergy 23, no. 3 (2009): 239–43. http://dx.doi.org/10.2500/ajra.2009.23.3307.

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Background Impaired olfactory function leads to a decrease in the quality of life for many patients. Surgical treatment options are limited, especially for those suffering from hyposmia or anosmia after posttraumatic injury to the olfactory nerves. Stem cells located in the olfactory epithelium (OE) have the capacity to grow new neurons, making the OE an ideal candidate for restorative tissue grafting. This study was performed to determine if strips of OE survive transplantation directly to the olfactory bulb (OB). Methods Transgenic mice, expressing a green fluorescent protein (GFP), were use

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Buschhüter, D., M. Smitka, S. Puschmann, et al. "Correlation between olfactory bulb volume and olfactory function." NeuroImage 42, no. 2 (2008): 498–502. http://dx.doi.org/10.1016/j.neuroimage.2008.05.004.

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Rombaux, Philippe, Caroline Huart, Naïma Deggouj, and Thierry Duprez. "Olfactory Bulb Volume for Prognosis in Olfactory Loss." Otolaryngology–Head and Neck Surgery 147, no. 2_suppl (2012): P114. http://dx.doi.org/10.1177/0194599812451438a247.

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Ortiz-Leal, Irene, Mateo V. Torres, Linda Noa López-Callejo, Luis Eusebio Fidalgo, Ana López-Beceiro, and Pablo Sanchez-Quinteiro. "Comparative Neuroanatomical Study of the Main Olfactory Bulb in Domestic and Wild Canids: Dog, Wolf and Red Fox." Animals 12, no. 9 (2022): 1079. http://dx.doi.org/10.3390/ani12091079.

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The sense of smell plays a fundamental role in mammalian survival. There is a considerable amount of information available on the vomeronasal system of both domestic and wild canids. However, much less information is available on the canid main olfactory system, particularly at the level of the main olfactory bulb. Comparative study of the neuroanatomy of wild and domestic canids provides an excellent model for understanding the effects of selection pressure associated with domestication. A comprehensive histological (hematoxylin–eosin, Nissl, Tolivia and Gallego’s Trichrome stains), lectin (U

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Tsepkolenko, A. "Olfactory dysfunction and olfactory bulb volume in patients with deviated nasal septum." Radiation Diagnostics, Radiation Therapy 12, no. 4 (2022): 7–11. http://dx.doi.org/10.37336/2707-0700-2021-4-1.

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The purpose of the study is to demonstrate the possibility and information content of olfactory bulb volume measuring in healthy volunteers and patients with deviated nasal septum, as well as the relationship between the volume of the olfactory bulb and olfactory function. Material and methods. 28 men with deviated nasal septum aged 24 to 35 years (main group) and 21 clinically healthy volunteers, men aged 23 to 33 years (control group) were examined. All patients underwent checkup of the ENT organs and examinations on a 1.5 T MRI machine with 12-channel head coil. The sense of smell was exami

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Kondoh, Daisuke, Akihiro Kamikawa, Motoki Sasaki та Nobuo Kitamura. "Localization of α1-2 Fucose Glycan in the Mouse Olfactory Pathway". Cells Tissues Organs 203, № 1 (2016): 20–28. http://dx.doi.org/10.1159/000447009.

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Glycoconjugates in the olfactory system play critical roles in neuronal formation, and α1-2 fucose (α1-2Fuc) glycan mediates neurite outgrowth and synaptic plasticity. Histochemical findings of α1-2Fuc glycan in the mouse olfactory system detected using Ulex europaeus agglutinin-I (UEA-I) vary. This study histochemically assessed the main olfactory and vomeronasal pathways in male and female ICR and C57BL/6J mice aged 3-4 months using UEA-I. Ulex europaeus agglutinin-I reacted with most receptor cells arranged mainly at the basal region of the olfactory epithelium. The olfactory nerve layer an

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Kawai, Takafumi, Hideki Abe, and Yoshitaka Oka. "Dopaminergic neuromodulation of synaptic transmission between mitral and granule cells in the teleost olfactory bulb." Journal of Neurophysiology 107, no. 5 (2012): 1313–24. http://dx.doi.org/10.1152/jn.00536.2011.

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A growing body of evidence suggests that teleosts are important models for the study of neural processing of olfactory information, and the functional role of dopamine (DA), which is a potent neuromodulator endogenous to the mammalian olfactory bulb, has been one of the strongest focuses in this field. However, the cellular mechanisms of dopaminergic neuromodulation in olfactory bulbar neural circuits have not been fully understood. We investigated such mechanisms by using the goldfish, which offers several advantages for analyzing olfactory information processing by electrophysiological metho

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Inoue, Tsuyoshi, and Ben W. Strowbridge. "Transient Activity Induces a Long-Lasting Increase in the Excitability of Olfactory Bulb Interneurons." Journal of Neurophysiology 99, no. 1 (2008): 187–99. http://dx.doi.org/10.1152/jn.00526.2007.

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Little is known about the cellular mechanisms that underlie the processing and storage of sensory in the mammalian olfactory system. Here we show that persistent spiking, an activity pattern associated with working memory in other brain regions, can be evoked in the olfactory bulb by stimuli that mimic physiological patterns of synaptic input. We find that brief discharges trigger persistent activity in individual interneurons that receive slow, subthreshold oscillatory input in acute rat olfactory bulb slices. A 2- to 5-Hz oscillatory input, which resembles the synaptic drive that the olfacto

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Darcy, Daniel P., and Jeffry S. Isaacson. "Calcium-Permeable AMPA Receptors Mediate Glutamatergic Signaling in Neural Precursor Cells of the Postnatal Olfactory Bulb." Journal of Neurophysiology 103, no. 3 (2010): 1431–37. http://dx.doi.org/10.1152/jn.00821.2009.

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Neural precursor cells (NPCs) in the mammalian olfactory bulb give rise to local inhibitory neurons that integrate into existing circuitry throughout adult life. However, the functional properties of neurotransmitter receptors expressed by NPCs are not well understood. In this study, we use patch-clamp recording and calcium imaging to explore the properties of glutamate receptors expressed by NPCs in the olfactory bulb subependymal layer. We find that calcium-permeable AMPA receptors (AMPARs) are the major receptor type underlying glutamatergic signaling in olfactory bulb NPCs. We also show th

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Goektas, O., F. Schmidt, G. Bohner, et al. "Olfactory bulb volume and olfactory function in patients with multiple sclerosis." Rhinology journal 49, no. 2 (2011): 221–26. http://dx.doi.org/10.4193/rhino10.136.

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BACKGROUND: Some studies reported olfactory dysfunction in patients with multiple sclerosis (MS). There is no agreement about the most suitable testing method for measuring olfactory function (OF) in MS patients. Recent studies showed that olfactory bulb volume changes with the degree of olfactory dysfunction. We assessed olfactory bulb volume of MS patients with magnetic resonance imaging (MRI) and related it to the OF. MATERIAL AND METHODS: Volumetric measurements of the right and left olfactory bulb (OB) were performed by manual segmentation within 36 MS patients. Psychophysical testing of

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Ozdemir, Nuriye Guzin, Ibrahim Burak Atci, Sevda Bag, Hakan Yilmaz, Yesim Karagoz, and Adem Yilmaz. "Magnetic resonance imaging study; does the olfactory bulb volume change in major depression?" Romanian Neurosurgery 30, no. 1 (2016): 98–103. http://dx.doi.org/10.1515/romneu-2016-0015.

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Abstract Goal: The olfactory region function disorders and olfactory bulb volume changes in neurodegenerative and neuropsychiatric disorders are defined. In this study, the olfactory bulb values of patients diagnosed with major depression in accordance with DMS-IV criteria, are measured with MRI, and these values are compared with the values of healthy volunteers to see if there are any statistically significant changes. Method: The study was carried out with 20 healthy volunteers and 20 patients who had been diagnosed with acute major depression in accordance with ‘diagnostic and statistical

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