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Related Experiment Video

Updated: Jul 2, 2026

Structured Motor Rehabilitation After Selective Nerve Transfers

Structured Motor Rehabilitation After Selective Nerve Transfers

Published on: August 15, 2019

Retained hand function following transection of the ulnar nerve.

R Shane Tubbs¹, M Loukas, M M Shoja

¹Section of Pediatric Neurosurgery, Children s Hospital, Birmingham, AL 35233, USA. rstubbs@uab.edu

Bratislavske Lekarske Listy

|August 15, 2008

Summary

A child with a severed ulnar nerve maintained full hand function due to a rare Martin-Grüber anastomosis. This anatomical variation highlights the importance of considering neural communications when assessing upper extremity nerve injuries.

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Therapy Interventions for Upper Limb Amputees Undergoing Selective Nerve Transfers

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Area of Science:

Neurology
Anatomy
Traumatology

Background:

Complete transection of peripheral nerves typically leads to loss of function in innervated muscles.
Evaluating upper extremity nerve injuries requires understanding potential anatomical variations.

Observation:

A pediatric patient presented with a traumatically transected ulnar nerve.
Despite the nerve transection, the child exhibited complete preservation of hand function.

Findings:

The retained hand function is attributed to a Martin-Grüber anastomosis.
This anastomosis represents an unusual interneural communication between the ulnar and median nerves in the forearm.

Implications:

Martin-Grüber anastomosis is a significant factor in cases of peripheral nerve injury.
Clinicians must consider such neural variations during the assessment of upper extremity nerve trauma for accurate diagnosis and treatment planning.