Suprascapular nerve

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Nerve: Suprascapular nerve
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The suprascapular, axillary, and radial nerves. (Suprascapular labeled at upper left.)
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The right brachial plexus with its short branches, viewed from in front. (Suprascapular labeled at upper left.)
Latin nervus suprascapularis
Gray's p.932
Innervates supraspinatus, infraspinatus
From C5–C6 of brachial plexus

The suprascapular nerve arises from the upper trunk (formed by the union of the fifth and sixth cervical nerves). It innervates the supraspinatus and infraspinatus muscles.

It runs lateral beneath the trapezius and the omohyoid, and enters the supraspinous fossa through the suprascapular notch, below the superior transverse scapular ligament; it then passes beneath the supraspinatus, and curves around the lateral border of the spine of the scapula to the infraspinous fossa.

In the supraspinous fossa it gives off two branches to the Supraspinatus muscle, and an articular filament to the shoulder-joint; and in the infraspinous fossa it gives off two branches to the infraspinatus muscle, besides some filaments to the shoulder-joint and scapula.

Disorders[edit]

  • Suprascapular paralysis, causing back pain, problems with abduction and external rotation of the humerus, and wasting away of supraspinatus and infraspinatus.

Additional images[edit]

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.