Recherche Tomodensitométrique sur la Topographie Stéréotaxique des Espaces Méningés de la Vache (<i>Bos taurus</i> L.)

Lignereux, Y.; Fargeas, J.B.; Marty, M.; Bénard, P.

doi:10.1111/j.1439-0264.1986.tb00542.x

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The SCN at these levels is located below the SoR, lining the dorsal surface of that portion of optic chiasm that is still detached at these levels from the ventral borders of the brain. Despite the fact that such a conformation is uncommon in most studied species, a similar organization has been described in sheep ( Tillet et al, 1989 ; Tessonneaud et al, 1994 ), cow ( Lignereux, 1986 ), and in humans ( Swaab et al, 1985 ; Hofman et al, 1988 ; Hofman and Swaab, 1989 ). Similarities with these species were also demonstrated with regard to the rostrocaudal morphological variations of the SCN.…”

Section: Discussionmentioning

confidence: 64%

The Suprachiasmatic Nucleus of the Dromedary Camel (Camelus dromedarius): Cytoarchitecture and Neurochemical Anatomy

et al. 2017

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In mammals, biological rhythms are driven by a master circadian clock located in the suprachiasmatic nucleus (SCN) of the hypothalamus. Recently, we have demonstrated that in the camel, the daily cycle of environmental temperature is able to entrain the master clock. This raises several questions about the structure and function of the SCN in this species. The current work is the first neuroanatomical investigation of the camel SCN. We carried out a cartography and cytoarchitectural study of the nucleus and then studied its cell types and chemical neuroanatomy. Relevant neuropeptides involved in the circadian system were investigated, including arginine-vasopressin (AVP), vasoactive intestinal polypeptide (VIP), met-enkephalin (Met-Enk), neuropeptide Y (NPY), as well as oxytocin (OT). The neurotransmitter serotonin (5-HT) and the enzymes tyrosine hydroxylase (TH) and aromatic L-amino acid decarboxylase (AADC) were also studied. The camel SCN is a large and elongated nucleus, extending rostrocaudally for 9.55 ± 0.10 mm. Based on histological and immunofluorescence findings, we subdivided the camel SCN into rostral/preoptic (rSCN), middle/main body (mSCN) and caudal/retrochiasmatic (cSCN) divisions. Among mammals, the rSCN is unusual and appears as an assembly of neurons that protrudes from the main mass of the hypothalamus. The mSCN exhibits the triangular shape described in rodents, while the cSCN is located in the retrochiasmatic area. As expected, VIP-immunoreactive (ir) neurons were observed in the ventral part of mSCN. AVP-ir neurons were located in the rSCN and mSCN. Results also showed the presence of OT-ir and TH-ir neurons which seem to be a peculiarity of the camel SCN. OT-ir neurons were either scattered or gathered in one isolated cluster, while TH-ir neurons constituted two defined populations, dorsal parvicellular and ventral magnocellular neurons, respectively. TH colocalized with VIP in some rSCN neurons. Moreover, a high density of Met-Enk-ir, 5-HT-ir and NPY-ir fibers were observed within the SCN. Both the cytoarchitecture and the distribution of neuropeptides are unusual in the camel SCN as compared to other mammals. The presence of OT and TH in the camel SCN suggests their role in the modulation of circadian rhythms and the adaptation to photic and non-photic cues under desert conditions.

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Section: Discussionmentioning

confidence: 64%

The Suprachiasmatic Nucleus of the Dromedary Camel (Camelus dromedarius): Cytoarchitecture and Neurochemical Anatomy

et al. 2017

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“…Additionally, the NAc and the corpus amygdaloideum were taken from the left and right hemispheres of the brain and stored in RNAlater (Qiagen, Hilden, Germany) at − 70 °C until analysis. The localization of these areas was determined using a stereotaxic atlas of the cow's brain 89 . It was not possible to extract tissue from the left NAc of two animals and from the right NAc of one animal in the CON group.…”

Section: Real-time Pcr (Qpcr)mentioning

confidence: 99%

Endocannabinoid administration affects taste preference and the expression of cannabinoid and opioid receptors in the amygdala of early lactating cows

Schwerdtfeger

Krause

Kalbe

et al. 2023

Sci Rep

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The aim of the study was to investigate the influence of intraperitoneal N-arachidonoylethanolamide (AEA) on taste preference for feed and water, tongue taste receptor signalling (TAS1R2, GNAT3), and endocannabinoid (CNR1, CNR2, GPR55) and opioid (OPRD1, OPRK1, OPRM1, OPRL1) receptors in the amygdala and nucleus accumbens in periparturient cows. We conducted taste preference tests using unaltered, umami-tasting, and sweet-tasting water and feed, before and after calving. After calving, eight cows received AEA injections (3 µg/(kg bodyweight × day), 25 days), whereas eight control (CON) cows received saline injections. Tissue was sampled 30 days after calving. Before calving, both cow groups preferred sweet-tasting feed and umami-tasting water. After calving, only the AEA-treated group preferred sweet-tasting feed, whereas the CON group showed no clear taste preference. In the amygdala, the mRNA expression of CNR1, OPRD1 (left hemisphere) and OPRK1 (right hemisphere) was lower in AEA animals than in CON animals, whereas no differences were found in the nucleus accumbens and tongue taste receptor expression. In conclusion, AEA administration enhanced existing taste preferences and reduced the expression of specific endocannabinoid and opioid receptors in the amygdala. The results support endocannabinoid-opioid interactions in the control of taste-dependent feed preference in early lactating cows.

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“…Cariier [ 1982. Legrand and Cariier [ 1986) and Fanuel-Barret 11986] and in the cow by Lignereux [1986] and Lignereux et al [1986],…”

Section: Introductionmentioning

confidence: 99%

Utilization of Computerized Tomography for the Determination of the Volume of the Cranial Cavity of the Galgo Hound

Robina

Regodón

Guillen

et al. 1991

Cells Tissues Organs

Self Cite

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The volumetry of the cranial cavity of 30 galgo hounds (15 males and 15 females) has been studied by computerized axial scanning tomography and biostatistical methods. The serial tomodensitometric sections of heads were 5 mm thick and 5 mm distant, taken in sagittal and transverse planes. Results demonstrate a sexual differentiation, with a security of 99.99%. The discussion turns to zootechnical and osteoarcheological applications.

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Recherche Tomodensitométrique sur la Topographie Stéréotaxique des Espaces Méningés de la Vache (Bos taurus L.)

Cited by 6 publications

References 11 publications

The Suprachiasmatic Nucleus of the Dromedary Camel (Camelus dromedarius): Cytoarchitecture and Neurochemical Anatomy

The Suprachiasmatic Nucleus of the Dromedary Camel (Camelus dromedarius): Cytoarchitecture and Neurochemical Anatomy

Endocannabinoid administration affects taste preference and the expression of cannabinoid and opioid receptors in the amygdala of early lactating cows

Utilization of Computerized Tomography for the Determination of the Volume of the Cranial Cavity of the Galgo Hound

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