نتایج جستجو برای: thalamic nucleus axis
تعداد نتایج: 222272 فیلتر نتایج به سال:
These experiments investigate the processes regulating the morphological differentiation of synaptic connections. Electron microscopy showed that the terminal boutons and synaptic complexes of retinal afferent axons in the main thalamic visual nucleus, the dorsal lateral geniculate nucleus, differ in their morphology from those of ascending afferent axons in the main thalamic somatosensory (ven...
Relay neurons of the lateral geniculate nucleus innervate visual cortex, but they also provide axonal collaterals to neurons in the thalamic reticular nucleus, and these thalamic reticular neurons provide feedback inhibition to relay cells. An alternative source of inhibitory inputs onto geniculate relay neurons arises from intralaminar interneurons that provide feedforward inhibition via retin...
The historical bases of the definitions of the prefrontal cortex are reviewed (cytoarchitecture, electrical unexcitability, afferents from the mediodorsal thalamic nucleus). Evidence is presented that the widely accepted proposal of Rose and Woolsey (1948) to name all cortex prefrontal that is reached by afferents from the mediodorsal nucleus is questionable for three reasons: the diversity of ...
The cerebral cortex is organized into specialized sensory areas, whose initial territory is determined by intracortical molecular determinants. Yet, sensory cortical area size appears to be fine tuned during development to respond to functional adaptations. Here we demonstrate the existence of a prenatal sub-cortical mechanism that regulates the cortical areas size in mice. This mechanism is me...
Running title: Central lateral thalamic nucleus responses to visceral input
A unilateral lesion of the rat nigrostriatal pathway with 6-hydroxydopamine (6-OHDA) results in a decrease in the basal extracellular level of striatal glutamate, a nearly complete loss of tyrosine hydroxylase (TH) immunolabeling, an increase in the density of glutamate immunogold labeling within nerve terminals making an asymmetrical synaptic contact, and an increase in the number of apomorphi...
The subcortical afferents of the mediodorsal thalamic nucleus (MD) were studied using the method of retrograde horseradish peroxidase transport. Analysis of the distribution of labeled cells following injections into particular MD segments established specific and unspecific projections originating in various subcortical structures. The medial MD segment is related to such structures of the lim...
In layer IV of rat somatosensory cortex, barrel circuitry is highly sensitive to thalamic population firing rates during the first few milliseconds of the whisker-evoked response. This sensitivity of barrel neurons to thalamic firing synchrony was inferred previously from analysis of simulated barrel circuitry and from single-unit recordings performed one at a time. In this study, we investigat...
Three monkeys were trained preoperatively in a scene memory task which is analogous, in some ways, to human episodic memory. The same animals were also trained in object-reward association memory. Following bilateral ablations of almost the entire magnocellular division of the mediodorsal thalamic nucleus, the animals were impaired both in scene memory and in object-reward association memory. T...
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