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Development, Vol 99, Issue 2 221-230, Copyright © 1987 by Company of Biologists

JOURNAL ARTICLES

Reformation of the pattern of neuromuscular connections in the regenerated axolotl hindlimb

N Stephens and N Holder
Department of Anatomy & Human Biology, King's College London (KQC), UK.

Retrograde neuronal tracing with horseradish peroxidase (HRP) was used to determine the position in the spinal cord of motor neurone pools innervating muscles in the regenerated axolotl hindlimb. This method allows a detailed analysis of the accuracy of reformation of neuromuscular connections. The results show that regenerated distal limb muscles are reinnervated by motor neurones in the same region of the cord as those that innervate normal control distal limb muscles but that proximal muscles are innervated by a mixture of motor neurones in a normal position and motor neurones in a region of the spinal cord that normally supplies innervation to distal limb muscles. This difference between the reinnervation of proximal and distal limb muscles suggests that axons destined for proximal muscles may not enter distal limb territory during reinnervation of the regenerated limb.




© The Company of Biologists Ltd 1987