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Electrophysiological study of functional interrelationships between ventral posterolateral nucleus and lateral parts of the reticular thalamic nucleus


, : Electrophysiological study of functional interrelationships between ventral posterolateral nucleus and lateral parts of the reticular thalamic nucleus. Fiziologicheskii Zhurnal (Kiev) 31(4): 423-428

Responses of ventral posterolateral nucleus (VPL) neurons to electrical stimulation of lateral parts of thalamic reticular nucleus (R1) directly adjacent to VPL were studied in acute experiments on cats anesthetized with thiopental sodium and immobilized with flaxedil. Antidromic responses with latencies within the range of 0.4 and 2.5 ms were recorded in 19 (23.8%) extracellularly studied neurons out of 73 ones. Orthodromic responses were observed in 43.8% of the studied neurons including excitative responses in 26.0% of them. Inhibition in response to R1 stimulation was found in 24 cells out of 38 specially investigated neurons. EPSPs, EPSPs-spikes-IPSPs, antidromic spikes-IPSPs, IPSPs were registered in VPL neurons during intracellular recordings. Comparison of the results obtained in the given research with those obtained previously from the study of VPL neurons reaction to SI stimulation and data available in literature on the VPL ultrastructure permitted concluding that inhibition evoked in VPL neurons by R1 stimulation was stipulated by excitation of inhibitory R neurons, whereas excitation in VPL.sbd.by activation of corticothalamic fibres passing through R1.

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Related references

Prokopenko, V.F.; Voloshin, M.Ia., 1985: Electrophysiological study of functional interrelations between the ventral posterolateral nucleus and lateral segments of the reticular thalamic nucleus. Fiziologicheskii Zhurnal 31(4): 423-428

Magnin, M.; Putkonen, P.T., 1978: A new vestibular thalamic area: electrophysiological study of the thalamic reticular nucleus and of the ventral lateral geniculate complex of the cat. Single unit recordings were carried out in the reticularis thalamic nucleus (RT) and the ventral lateral geniculate body (LGv) of chronically prepared alert cats under sinusoidal vestibular stimulation in the horizontal plane. Optokinetic stimulat...

M.Y.. Voloshin; V.F.P.okopenko, 1977: Unit responses of the ventral posterior and ventral lateral thalamic nuclei to electrical stimulation of the thalamic reticular nucleus. A microelectrode investigation was made of responses of 72 physiologically identified neurons of the ventral posterior (VP) and 116 neurons of the ventral lateral (VL) thalamic nuclei to electrical stimulation of the reticular (R) thalamic nucleus...

Bava, A.; Cicirata, F.; Licciardello, S.; Pantò, M.R., 1978: Reactions and functional significance of the neurons of lateral ventral thalamic nucleus. VL reaction to stimulation of the tegmental nucleus: intracellular study. Bollettino Della Societa Italiana di Biologia Sperimentale 54(23): 2341-2347

Voloshin, M.Y. ; Prokopenko, V.F., 1977: Responses of ventral posterior and ventral lateral thalamic neurons to stimulation of the thalamic reticular nucleus. Responses of 72 ventral posterior (VP) and 116 ventral lateral (VL) thalamic neurons to electrical stimulation of the thalamic reticular nucleus were studied in cats immobilized with d-tubocurarine. All neurons were identified according to their r...

Tsaturov V.L.; Durinyan R.A., 1970: Response of mid brain reticular neurons to electrical stimulation of the posterolateral ventral thalamic nucleus. Doklady Biological Sciences 194(1-6): 589-591

Inamura, N.; Ono, K.; Takebayashi, H.; Zalc, B.; Ikenaka, K., 2012: Olig2 lineage cells generate GABAergic neurons in the prethalamic nuclei, including the zona incerta, ventral lateral geniculate nucleus and reticular thalamic nucleus. Neuronal differentiation is a crucial event during neural development. Recent studies have characterized the development of the diencephalon; however, the origins of the primarily GABAergic prethalamic nuclei, including the zona incerta (ZI), vent...

Sotgiu M.L.; Marini G., 1984: Electrophysiological and anatomical study of connections between lateral reticular nucleus region and motor trigeminal nucleus. Neuroscience Letters (SUPPL 18): S59

Serkov, F.N.; Voloshin, M.Ia.; Gonchar, I.A.; Prokopenko, V.F., 1986: Electrophysiological research on the excitation and inhibition evoked by ascending and corticofugal impulses in the relay neurons of the ventral posterolateral thalamic nucleus. Fiziologicheskii Zhurnal 32(6): 681-690

Tatevosyan I.G.; Vaganyan L.G.; Bagdasaryan R.A.; Kostanyan E.G.; Tatevosyan N.E., 1990: Effect of the frequency stimulation of the somatovisceral afferent systems on the electrophysiological characteristics of specific ventral posterolateral thalamic nucleus neurons. Increasing of VPL neuronal responsiveness to the gradual increasing of sciatic, radial and splanchnic nerves stimulation rate (1-6 Hz to 10-30 Hz) has been shown in anesthetized (Nembutal-Chloralosa) and immobilized (D-Tubocurarine) cats. Facilita...