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


, : 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

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.

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Voloshin, M.Ia.; Prokopenko, V.F.; Gonchar, I.A., 1986: Electrophysiologic study of descending effects of field 5b of the association cortex of the brain of the cat on the 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 myorelaxine (2 mg/kg). Neur...

Ocherashvili, I.V.; Roĭtbak, A.I.; Bobrov, A.V.; Kapel', R.G., 1983: Changes in the concentration of extracellular potassium and the slow negative potential in the somatosensory area of the cortex in response to stimulation of the ventroposterolateral nucleus of the thalamus in the cat. A single electrical stimulus applied to the VPL nucleus with intensity, strong enough to elicit in gyrus sigmoideus posterior slow negativity following the primary response, caused a local increase in [K+]0 reaching 0.2 mM. On the basis of this fi...

Blomqvist, A.; Flink, R.; Westman, J.; Wiberg, M., 1985: Synaptic terminals in the ventroposterolateral nucleus of the thalamus from neurons in the dorsal column and lateral cervical nuclei: an electron microscopic study in the cat. The afferent fibres to the ventroposterolateral nucleus (VPL) of the contralateral thalamus from neurons in the dorsal column nuclei (DCN) and the lateral cervical nucleus (LCN) were labelled by anterograde transport of wheat germ agglutinin-horse...

Blomqvist A.; Flink R.; Westman J.; Wiberg M., 1985: Synaptic terminals in the ventroposterolateral nucleus of the thalamus for neurons in the dorsal column and lateral cervical nuclei an electron microscopic study in the cat. The afferent fibres to the ventroposterolateral nucleus (VPL) of the contralateral thalamus from neurons in the dorsal column nuclei (DCN) and the lateral cervical nucleus (LCN) were labelled by anterograde transport of wheat germ agglutinin-horse...

Chandler, M.J.; Hobbs, S.F.; Fu, Q.G.; Kenshalo, D.R.; Blair, R.W.; Foreman, R.D., 1992: Responses of neurons in ventroposterolateral nucleus of primate thalamus to urinary bladder distension. The purpose of this study was to examine effects of a noxious visceral stimulus, urinary bladder distension (UBD), on cells in the ventroposterolateral (VPL) nucleus of anesthetized monkeys. We hypothesized that processing of visceral information...

Chandler M.J.; Hobbs S.F.; F.Q.G.; Kenshalo D.R.Jr; Blair R.W.; Foreman R.D., 1992: Response of neurons in ventroposterolateral nucleus of primate thalamus to urinary bladder distension. The purpose of this study was to examine effects of a noxious visceral stimulus, urinary bladder distension (UBD), on cells in the ventroposterolateral (VPL) nucleus of anesthetized monkeys. We hypothesized that processing of visceral information...

Kalistratov G.F., 1969: Participation of the ventroposterolateral nucleus of the thalamus in the distribution of the afferent flow to projection areas of the cat cortex. Doklady Akademii Nauk Sssr: 950-953

Kniffki K D.; Mizumura K., 1983: Responses of neurons in ventroposterolateral nucleus ventrolateral and ventroposterolateral nucleus regions of the cat to algesic stimulation of muscle and tendon. The responses evoked by electrical stimulation of cutaneous and muscle nerves, by noxious and innocuous mechanical stimulation of muscle, tendon and cutaneous tissues, and by intra-arterial (i.a.) injection of algesic substances (K, bradykinin) in...

Kniffki K D.; Craig A.D., 1985: The distribution of nociceptive neurons in the cats lateral thalamus the dorsal and ventral periphery of ventroposterolateral nucleus. Rowe, M And W D Willis, Jr (Ed ) Neurology And Neurobiology (New York), Vol 14 Development, Organization, And Processing in Somatosensory Pathways; Proceedings Of A Satellite Symposium Of The International Congress Of Physiological Sciences, Sydney, Australia, Sept 4-7, 1983 Xvii+411p Alan R Liss, Inc : New York, N Y , Usa Illus 375-382

Ocherashvili, I.V., 1985: Slow electrical potentials arising after the initial response in the somatosensory cortex of the brain of the cat upon stimulation of the ventroposterolateral nucleus of the thalamus. Experiments were carried out on cats under pentobarbital anaesthesia. A single electrical stimulus applied to the VPL nucleus evoked in g. sigmoideus posterior a primary response, followed by delayed negative wave and slow negativity. Generation o...