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Journal of Neuroscience, Vol 3, 567-575, Copyright © 1983 by Society for Neuroscience

ARTICLE

Principles of motor organization of the monkey cervical spinal cord

AB Jenny and J Inukai

The organization of spinal cord motor columns innervating 18 selected macaque forelimb muscles was studied with the technique of retrograde transport of horseradish peroxidase. The reliability of the method was evaluated in the cat hindlimb. Motor columns innervating forearm muscles with similar actions on the hand appear to overlap in the anterior horn. Extensor motoneurons are generally positioned ventral and/or lateral to flexor motoneurons. Motoneurons controlling hand movement are located primarily in segments C8 and T1.

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