Motor March Phenomenon

Motor march phenomenon is a sign of reinnervation like Hoffman-Tinel’s sign which has been discussed earlier.

Observed in:

  1. Axonotmesis
  2. Repaired Neurotmesis

Not observed in:

  • Neuropraxia
Wallerian degeneration
Source: Alvites, R. D. , Santos, A. R. C. , ProençaVarejão, A. S. , de Castro Osório Maurício, A. C. P. . Olfactory Mucosa Mesenchymal Stem Cells and Biomaterials: A New Combination to Regenerative Therapies after Peripheral Nerve Injury. In: Pham, P. V. , editor. Mesenchymal Stem Cells – Isolation, Characterization and Applications [Internet]. London: IntechOpen; 2017 [cited 2022 Oct 21]. Available from: doi: 10.5772/intechopen.68174 [CC BY 3.0]

Motor march phenomenon: As the re-innervation of injured nerve proceeds, the muscles nearest to the site of injury recovers first followed by distal ones sequentially (proximal to distal). The commonest example of this phenomenon is the radial nerve injury in radial groove in shaft of humerus fractures. The first muscle that would recover is the brachioradialis followed by Extensor carpi radialis longus (ECRL) and further distally sequentially.

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