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Development, Vol 103, Issue 2 365-377, Copyright © 1988 by Company of Biologists

JOURNAL ARTICLES

Reformation of specific neuromuscular connections during axolotl limb regeneration: evidence that the first contacts are correct

S Wilson, M Jesani and N Holder
Department of Anatomy & Human Biology, King's College London, UK.

Retrograde neuronal tracing with horseradish peroxidase was used to determine the position in the spinal cord of the motor neurone pools of a proximal (biceps) and a distal (extensor digitorum) limb muscle at various times during axolotl limb regeneration. It was found that from the earliest stages of muscle redifferentiation (as judged by light and electron microscopic analysis) the vast majority of axons innervating the regenerating muscles came from cells within the bounds of the normal motor neurone pool for each muscle. A few incorrect projections were noted in that the regenerating proximal muscle was sometimes innervated by some cells caudal to its normal motor neurone pool. The results are discussed in terms of mechanisms that may be operating in the regenerating limb to ensure that specific neuromuscular connections are made.


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J. Neurosci., February 23, 2005; 25(8): 2081 - 2091.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1988