Otvety neǐronov verkhnikh sheǐnykh segmentov spinnogo mozga koshki na razdrazhenie lokomotornoǐ oblasti mozgovogo stvola s raznymi chastotami.

Translated title of the contribution: Responses of neurons of the upper cervical segments of the spinal cord in the cat to stimulation of the locomotor region of the brain stem with different frequencies

O. V. Kazennikov*, M. L. Shik, G. V. Iakovleva

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Synaptic responses of C2 and C3 neurons to stimulation of medullary or midbrain locomotor points were recorded extracellularly in mesencephalic cats. Neurons excited with a firing index of 0.4-0.6 at a stimulation frequency of 2 S-1 retained this index at frequencies of 20-60 S-1 too. Many neurons with the low firing index under the stimulation frequency of 2 S-1 increased it to 0.4-0.6 under high frequency. More than a half of neurons were excited by stimulation of both ipsi- and contralateral locomotor points; a quarter of units responded to stimulation of locomotor points both in the medulla and in the midbrain. The neurons under study were located at a distance of 1.8-4.2 mm from the dorsal surface of the spinal cord. Average latencies of responses with a firing index more than 0.5 were distributed between 2 and 30 ms with a mode of 2-8 ms. Long-latency responses had significant fluctuations of latency. A possible participation of the investigated neurons in the propagation of activity from the brain stem locomotor region to stepping generators in the spinal cord is discussed.

Translated title of the contributionResponses of neurons of the upper cervical segments of the spinal cord in the cat to stimulation of the locomotor region of the brain stem with different frequencies
Original languageRussian
Pages (from-to)355-361
Number of pages7
JournalNeirofiziologiya
Volume15
Issue number4
StatePublished - 1983

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