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Electrophysiological study of influences from area 5b of cat associative cortex on neurons of the ventroposterolateral nucleus of the thalamus


Neirofiziologiya 18(2): 269-272
Electrophysiological study of influences from area 5b of cat associative cortex on neurons of the ventroposterolateral nucleus of the thalamus
Responses of 65 thalamic ventroposterolateral (VPL) nucleus neurons to stimulation of the associative cortex (area 5b) were studied in acute experiments on cats anesthetized with ketamine (25 mg/kg) and immobilized with myorelaxin (2 mg/kg). Neurons studied were identified on the basis of peculiarities of their response evoked by primary somatosensory cortex and medial lemniscus stimulation. Three neurons responded to stimulation of the area 5b antidromically. Primary orthodromic excitation and inhibition were observed in 17 (26.2%) VPL neurons. The role of the area 5b descending influences on the somatosensory impulses transmission through VPL relay neurons is discussed.


Accession: 005349837



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