Search results for "Cerebrum"

Amygdalostriatal projections in reptiles: A tract-tracing study in the lizardPodarcis hispanica

2004

Whereas the lacertilian anterior dorsal ventricular ridge contains unimodal sensory areas, its posterior part (PDVR) is an associative center that projects to the hypothalamus, thus being comparable to the amygdaloid formation. To further understand the organization of the reptilian cerebral hemispheres, we have used anterograde and retrograde tracing techniques to study the projections from the PDVR and adjoining areas (dorsolateral amygdala, DLA; deep lateral cortex, dLC; nucleus sphericus, NS) to the striatum in the lizard Podarcis hispanica. This information is complemented with a detailed description of the organization of the basal telencephalon of Podarcis. The caudal aspect of the d…

Interhemispheric connections through the pallial commissures in the brain ofPodarcis hispanicaandGallotia stehlinii(Reptilia, Lacertidae)

1990

The cells-of-origin and the mode and site of termination of the interhemispheric connections passing through the anterior and posterior pallial commissures in the telencephalon of two lizards (Podarcis hispanica and Gallotia stehlinii) were investigated by studying the anterograde and retrograde transport of unilaterally injected horseradish peroxidase. The commissural projections arise mainly from pyramidal cells in the medial, dorsomedial, and dorsal cortices (medial subfield). Additionally some non-pyramidal neurons in the medial and dorsal cortices contribute to the commissural system. Medial cortex neurons project to the contralateral anterior septum through the anterior pallial commis…

Neuronal circuitry in the medial cerebral cortex of lizards

1997

The medial cortex of lizards is a simple three-layered brain region displaying many characteristics which parallel the hippocampal fascia dentata of mammals. Its principal neurons form a morphologically diverse population, partly as a result of the prominent continuous growth of this nervous centre. By using the classical Golgi impregnation method we describe here the morphology of the principal neurons (8 types) and the short-axon interneurons (18 types) populating the medial cortex of Podarcis hispanica as well as the connections between them.

Distribution of corticotropin-releasing factor-immunoreactive neurons in the central nervous system of the domestic chicken and Japanese quail

2004

In birds, as in mammals, corticotropin-releasing factor (CRF) is present in a number of extrahypothalamic brain regions, indicating that CRF may play a role in physiological and behavioral responses other than the control of adrenocorticotropin hormone release by the pituitary. To provide a foundation for investigation of the roles of CRF in the control of avian behavior, the distribution of CRF immunoreactivity was determined throughout the central nervous system of the domestic chicken (Gallus domesticus) and Japanese quail (Coturnix japonica). The distribution of CRF-immunoreactive (-ir) perikarya and fibers in the chicken and quail brain was found to be more extensive than previously re…

Distribution of calcitonin gene-related peptide-like immunoreactivity in the brain of the lizardPodarcis hispanica

2002

The present work studies the distribution of calcitonin gene-related peptide-immunoreactive (CGRP-li) neurons and fibers in the brain of a reptile, the lizard Podarcis hispanica. CGRP-li perikarya were not present in the telencephalon. In the thalamus, CGRP-li perikarya were restricted to the posteromedial and posterolateral nuclei. In the hypothalamus, CGRP-li cells were found mainly in the supramammillary and mammillary nuclei. In the midbrain and brainstem, CGRP-li cells appeared in the ventral tegmental area, the parabrachial nucleus, and the motor nuclei of the III-VII, IX, X, and XII cranial nerves. Motoneurons of the ventral horn of the spinal cord were also immunoreactive for CGRP. …

The cellular composition and morphological organization of the ventricular zone in the adult zebrafish telencephalon

2009

Datortomogrāfijas protokola pielietošana smadzeņu nāves apstiprināšanai

2020

Bakalaura darba tēma ir “Datortomogrāfijas protokola pielietošana smadzeņu nāves apstiprināšanā”. Attīstoties intensīvās terapijas un transplantoloģijas nozarēm, smadzeņu nāves diagnostikā nepieciešams papildus veikt izmeklējumus, kas nodrošina ātru un efektīvu rezultātu, veicot apstiprinājumu smadzeņu nāves diagnozei. Datortomogrāfijas angiogrāfija ir viens no tiem. Bakalaura darba izvirzītā hipotēze ir: datortomogrāfijas protokols smadzeņu nāves apstiprināšanai katrā slimnīcā ir atšķirīgs. Darba mērķis ir noskaidrot datortomogrāfijas protokola pielietošanu smadzeņu nāves apstiprināšanai 3 Latvijas slimnīcās. Pētniecības uzdevumi ir apkopot un analizēt literatūru par galvas smadzeņu anatom…