suprascapular nerve

(redirected from Suprascapular nerves)

su·pra·scap·u·lar nerve

[TA]
arises from the upper trunk of the brachial plexus (fifth and sixth cervical spinal nerves), passes downward parallel to the cords of the brachial plexus, then through the scapular notch, supplying the supraspinatus and infraspinatus muscles, and also sending branches to the shoulder joint. It is vulnerable to injury in fractures of the middle third of the clavicle; a lesion of the suprascapular nerve results in a loss of lateral rotation at the shoulder so that when relaxed the limb rotates medially (waiter's tip position); ability to initiate abduction is also affected.
Synonym(s): nervus suprascapularis [TA]

su·pra·scap·u·lar nerve

(sū'pră-skap'yū-lăr nĕrv) [TA]
Arises from the upper trunk of the brachial plexus (fifth and sixth cervical spinal nerves), passes downward parallel to the cords of the brachial plexus, then through the scapular notch, supplying the supraspinatus and infraspinatus muscles, and also sending branches to the shoulder joint. It is vulnerable to injury in fractures of the middle third of the clavicle; a lesion of the suprascapular nerve results in a loss of lateral rotation at the shoulder so that when relaxed the limb rotates medially (waiter's tip position); ability to initiate abduction is also affected.
Synonym(s): nervus suprascapularis [TA] .

suprascapular nerve

A mixed shoulder nerve originating in the superior trunk of the brachial plexus and composed of axons from spinal cord segments C5–C6. It runs through the scapular notch under the superior transverse scapular ligament.

Sensory

It innervates the glenohumeral joint.

Motor

It innervates the supraspinatus and infraspinatus muscles.

See also: nerve
References in periodicals archive ?
The supraclavicular, subclavian, and long thoracic/ suprascapular nerves, alone or together, may be responsible for pain transmission after clavicular fracture and surgery [1, 13].
This specific location is propicious to affect the surrounding neurologic structures, mainly the accessory and suprascapular nerves. The patient demonstrated trapezius weakness, and the imaging illustrated the compressed accessory nerve between the osteochondroma and the deep layer of the trapezius.
Upon further evaluation by the primary author, she had tenderness of the long thoracic, dorsal scapular, and suprascapular nerves with palpation and tension of the nerve with palpation increased the pain.
An EMG and MRI revealed an entrapment neuropraxia of the left suprascapular nerve due to a ganglion cyst.
(4-6) In children with persistent neurological deficits, weakness of abduction, forward elevation, and external rotation is due to incomplete recovery of the axillary and suprascapular nerves. In C5/C6 or upper trunk lesions, the medial rotators of the shoulder are relatively "spared," and often there are associated internal rotation myostatic contractures of the subscapularis and pectoralis major.
Early, persistent, or progressive medial rotation contracture and glenohumeral deformity is always addressed at the time of primary plexus microneurosurgical reconstruction and suprascapular nerve reinnervation procedures.
(9-10) The axillary and suprascapular nerves may also be compromised in C5-C6 injuries.
The pertinent anatomy for this paper includes the roots, the superior trunk, the suprascapular nerve, and the terminal branch nerves.
Although admittedly the axillary and suprascapular nerves are the principal ones, his results would suggest that the others can be important also.
It may be possible to prolong duration in this group by using a suprascapular nerve catheter 2 and single-shot axillary nerve block.
Background: The suprascapular notch of scapula is converted into a foramen by superior transverse scapular ligament (STSL) with the suprascapular nerve passing through the foramen and the suprasca-pular vessels passing above it.
Conclusion: The role of STSL in causing suprascapular nerve entrapment is a known fact and proper understanding of the topographical anatomy may be helpful for clinicians and surgeons in routine pra-ctice.