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. 1977 Jan;264(1):1–16. doi: 10.1113/jphysiol.1977.sp011655

Inhibition of spinocervical tract discharges from localized areas of the sensorimotor cortex in the cat.

A G Brown, J D Coulter, P K Rose, A D Short, P J Snow
PMCID: PMC1307745  PMID: 839450

Abstract

1. Intracortical microstimualtion (ICMS) was applied within the sensorimotor cortex of cats anaesthetized with chloralose. 2. The effects of the ICMS were examined on the number of impulses in spinocervical tract (SCT) cells (recorded extracellularly in the contralateral lumbosacral spinal cord) evoked by peripheral stimulation. 3. Inhibition of SCT discharges was produced by ICMS in two distinct regions of the sensorimotor cortex. 4. One inhibitory regions was in part of cytoarchitectonic area 4 gamma in the upper bank of the cruciate sulcus. It sometimes extended caudally into area 4 delta, medially into area 3 alpha and/or rostrally into the part of area 4 gamma on the caudal lip of the cruciate sulcus. 5. The other inhibitory region was in the medial part of the posterior sigmoid gyrus and included parts of areas 3 alpha, 3 beta, 1, 5 alpha and 5 beta. 6. Most inhibitory sites were in cortical layers III, V and VI. 7. No regions were found in which ICMS consistently caused facilitation of SCT discharges.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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