suprascapular nerve

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    The suprascapular nerve is a mixed (sensory and motor) nerve that branches from the upper trunk of the brachial plexus. It is derived from the ventral rami of cervical nerves C5-C6. It provides motor innervation to the supraspinatus muscle, and the infraspinatus muscle.


    Structure




    = Origin

    =
    The suprascapular nerve arises from the upper trunk of the brachial plexus which is formed by the union of the ventral rami of the cervical nerves C5-C6.


    = Course and relations

    =
    After branching from the upper trunk, the nerve passes across the posterior triangle of the neck parallel to the inferior belly of the omohyoid muscle and deep to the trapezius muscle. It then runs along the superior border of the scapula through the suprascapular canal, in which it enters via the suprascapular notch inferior to the superior transverse scapular ligament and enters the supraspinous fossa. It then passes beneath the supraspinatus and curves around the lateral border of the spine of the scapula through spinogleniod notch to the infraspinous fossa.


    Function


    The suprascapular nerve is a mixed peripheral nerve containing motor and sensory components.


    = Motor innervation

    =
    Supraspinatus muscle
    Infraspinatus muscle (through the spinoglenoid notch)


    = Sensory innervation

    =
    Acromioclavicular joint
    Glenohumeral joint (shoulder joint)
    In the supraspinous fossa it gives off two branches to the supraspinatus muscle and in the infraspinous fossa it gives off two branches to the infraspinatus muscle.


    Clinical significance


    Suprascapular paralysis, causing back pain, problems with abduction and external rotation of the humerus, and wasting away of supraspinatus and infraspinatus. Supraspinatus muscle helps in 0°-15° arm abduction. And Infraspinatus helps in lateral rotation (external rotation) of humerus.
    Suprascapular nerve entrapment syndrome, causing shoulder pain and localized muscular atrophy of the supraspinatus and infraspinatus muscles. This can potentially develop due to suprascapular nerve being entrapped and compressed within the suprascapular canal potential anatomical entrapment sites.


    Additional images













    External links


    Suprascapular nerve at the Duke University Health System's Orthopedics program


    References


    This article incorporates text in the public domain from page 932 of the 20th edition of Gray's Anatomy (1918)

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suprascapular nerve

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Suprascapular nerve - Wikipedia

The suprascapular nerve is a mixed (sensory and motor) nerve that branches from the upper trunk of the brachial plexus. It is derived from the ventral rami of cervical nerves C5-C6. It provides motor innervation to the supraspinatus muscle, and the infraspinatus muscle.

Suprascapular nerve: origin, course and function - Kenhub

Oct 30, 2023 · The suprascapular nerve is the lateral branch of the superior trunk of the brachial plexus. It receives nerve fibers that originate in the nerve roots C5 and C6 (and sometimes C4). The suprascapular nerve is a mixed nerve, meaning that it provides both sensory and motor supply for the suprascapular region.

A tiny nerve in the shoulder can create so much trouble! All you …

Jan 14, 2017 · The suprascapular nerve is formed by nerve fibers from the 5 th and 6 th cervical roots. In order to reach its two muscle targets, this nerve first passes through a small notch on the top of the shoulder blade ( suprascapular notch , “supra” = top, “scapula” = shoulder blade).

Suprascapular Neuropathy - Shoulder & Elbow - Orthobullets

Jun 11, 2024 · Suprascapular neuropathy is compression of the suprascapular nerve that most commonly occurs at the suprascapular notch or spinoglenoid notch by a mass (i.e cyst). Diagnosis can be suspected clincally with weakness and atrophy of the infraspinatous or supraspinatous and confirmed with MRI studies showing cysts in the suprascapular notch or ...

Suprascapular Nerve Palsy - Physiopedia

The suprascapular nerve is a mixed nerve of the upper limb. Suprascapular nerve injury is experiencing an increase in clinical significance due to its role in shoulder pain and upper limb weakness.[1]

Anatomy, Shoulder and Upper Limb, Suprascapular Nerve

Oct 3, 2022 · The suprascapular nerve is a branch from the upper trunk of the brachial plexus; it innervates the infraspinatus and the supraspinatus muscles. It originates in the posterior triangle of the neck, where it runs to the upper part of the scapula downward and laterally parallel to the belly of the omohyoid muscle.

Suprascapular nerve | Radiology Reference Article - Radiopaedia.org

Mar 23, 2023 · The suprascapular nerve is the only branch of the upper trunk (C5 and C6) of the brachial plexus, supplying the supraspinatus and infraspinatus muscles and sensation to the acromioclavicular and glenohumeral joints.

Suprascapular Nerve Injury - StatPearls - NCBI Bookshelf

Jan 26, 2024 · This course addresses the various clinical aspects of suprascapular nerve (SSN) injuries. While the elusive nature of suprascapular nerve injury etiology persists, this course covers the complexities of its pathophysiology, including …

Treatment of suprascapular nerve entrapment syndrome - PMC

Suprascapular nerve entrapment syndrome (SNES) is an often-overlooked etiology of shoulder pain and weakness. Treatment varies depending on the location and etiology of entrapment, which can be described as compressive or traction lesions.

Suprascapular Nerve - Course - Functions - TeachMeAnatomy

Sep 19, 2023 · The suprascapular nerve is a mixed motor and sensory nerve arising from the superior trunk of the brachial plexus. It supplies sensory innervation to the glenohumeral and acromioclavicular joints and motor innervation to the supraspinatus and infraspinatus muscles.