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Exp Brain Res. 1994;99(3):529-32.

Recording an identified pyramidal volley evoked by transcranial magnetic stimulation in a conscious macaque monkey.

Author information

1
Department of Anatomy, Cambridge University, UK.

Abstract

A descending volley in response to non-invasive transcranial magnetic stimulation has been recorded from the pyramidal tract in a conscious monkey and identified by means of a collision test. The short latency of the earliest wave was inconsistent with a trans-synaptically mediated activation of pyramidal tract neurones. Considerable variability in the size of this wave was seen in response to a constant stimulus, and isoflurane anaesthetic was shown to depress it markedly. These results are consistent with direct activation of pyramidal tract neurones at a site close to the cell body.

PMID:
7957732
DOI:
10.1007/bf00228989
[Indexed for MEDLINE]

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