Distribution Of Efferent Neurons Research Articles

上丘と小脳虫部第IX小葉に投射するラット三叉神経脊髄路核および主知覚核ニューロン

上丘と小脳虫部第IX小葉に投射するラット三叉神経脊髄路核および主知覚核ニューロン

Distribution of efferent neurons projecting to the superior colliculus and cerebellum in the rat prepositus hypoglossi nucleus

Distribution of efferent neurons projecting to the superior colliculus and cerebellum in the rat prepositus hypoglossi nucleus

Electrophysiological analysis of efferent neurons of cat associative parietal cortex

We have studied in acute experiments the neurons of the associative parietal cortex in the cat, using the microelectrode take-off technique. We identified the efferent neurons sending axons to the sensomotor cortex, the red nucleus, and the pontine nuclei by antidromic stimulation. We investigated the collateral branching of axons of neurons projected simultaneously into two of the formations mentioned, using the impulse collision technique. We studied the characteristics of the spatial distribution of efferent neurons in the parietal cortex.

Distribution of efferent neurons of various types in the motor cortex of the cat

1. The distribution of efferent neurons of various categories, the pyramidal and extrapyramidal systems and corticothalamic neurons, the axons of which terminate in the ventroposterolateral thalamic nucleus and inner geniculate body, was studied in the sensorimotor cortex of cats. 2. Several outgoing cells belonging to a single or different categories were found in a large portion of the cortical microregions (88%). 3. Outgoing neurons of the categories investigated were not found in some tracts perpendicular to the cortical surface; in those tracts where efferent neurons were found, the cortical regions containing a specific set of outgoing cells usually represented cylinders of 500–700 μm height. 4. Individual cortical microregions differed from one another in the set of fast and slow efferent neurons.