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Related Experiment Video

Updated: Mar 13, 2026

Facial Nerve Axotomy in Mice: A Model to Study Motoneuron Response to Injury
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Accessory Upper Subscapular Nerve - The Neurotisation Tool.

Vishwajit Ravindra Deshmukh1, Rabindra Prasad Mandal2, Harisha Kusuma1

  • 1Senior Resident, Department of Anatomy, AIIMS , New Delhi, India .

Journal of Clinical and Diagnostic Research : JCDR
|October 30, 2016
PubMed
Summary
This summary is machine-generated.

An uncommon variation of the upper subscapular nerve was found during dissection. This rare brachial plexus anomaly involved the nerve arising in a triplet fashion, impacting subscapularis muscle innervation.

Keywords:
Brachial plexusInfraclavicular blocksNeurotisation surgeriesPosterior cordUpper subscapular nerve

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Area of Science:

  • Anatomy
  • Neuroscience

Background:

  • The brachial plexus is a critical network of nerves originating from the spinal cord, controlling upper limb movement and sensation.
  • Variations in brachial plexus anatomy are documented but require careful study for clinical relevance.

Observation:

  • During routine dissection, an unusual origin of the upper subscapular nerve from the posterior cord of the brachial plexus was identified.
  • The nerve presented in a triplet formation, originating just superior to the circumflex scapular artery.

Findings:

  • This case report details a rare anatomical variation where the upper subscapular nerve exhibited a trifurcated origin.
  • These accessory nerves were observed to innervate the superior portion of the subscapularis muscle.

Implications:

  • Understanding brachial plexus variations is crucial for accurate surgical planning, particularly in neurotization procedures.
  • Knowledge of such anomalies aids in performing precise infraclavicular nerve blocks for axillary and upper limb surgeries.