The effect of posterior column lesions on servo responses from the human long thumb flexor

Lesions of the posterior column pathways, in which muscle spindle afferents run towards the brain, are associated with loss of servo responses in the long flexor of the thumb, in the absence of motor weakness and with tendon jerks preserved. This evidence is consistent with the hypothesis that the l...

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Bibliographic Details
Published in:	Brain (London, England : 1878) Vol. 100 Pt 1; p. 185
Main Authors:	Marsden, C D, Merton, P A, Morton, H B, Adam, J
Format:	Journal Article
Language:	English
Published:	England 01-01-1977
Subjects:	Adult Evoked Potentials Female Humans Male Middle Aged Movement Disorders - physiopathology Muscle Contraction Muscles - innervation Muscles - physiopathology Reaction Time Reflex, Stretch Spinal Cord Diseases - physiopathology Thumb - innervation Thumb - physiopathology
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Summary:	Lesions of the posterior column pathways, in which muscle spindle afferents run towards the brain, are associated with loss of servo responses in the long flexor of the thumb, in the absence of motor weakness and with tendon jerks preserved. This evidence is consistent with the hypothesis that the long-latency stretch reflex (on which servo responses are based) uses a supraspinal, possibly a transcortical, reflex arc.
ISSN:	0006-8950
DOI:	10.1093/brain/100.1.185