Magnetic brain stimulation: a tool to explore the action of the motor cortex on single human spinal motoneurones.

Abstract:

:The human brain can be stimulated by a single intense magnetic pulse over the scalp. Currents induced within the cranium excite the motor cortex and cause limb muscles to contract. The discharge of single motor units, the firing of which is maintained by voluntary effort, can be modulated by magnetic stimuli. Peri-stimulus time histograms suggest that after a cortical stimulus spinal motoneurones are induced to fire by a sequence of EPSPs arising from a train of impulses transmitted monosynaptically over fast-conducting corticospinal fibres. In multiple sclerosis both dispersion of this descending volley and partial transmission failure can impair motoneurone excitation and may explain motor symptoms in these patients.

journal_name

Trends Neurosci

journal_title

Trends in neurosciences

authors

Mills KR

doi

10.1016/0166-2236(91)90029-t

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

401-5

issue

9

eissn

0166-2236

issn

1878-108X

pii

0166-2236(91)90029-T

journal_volume

14

pub_type

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