Suprascapular nerve
Nervus suprascapularis
Definition
The suprascapular nerve, a mixed nerve originating from the upper trunk of the brachial plexus (C5, C6), innervates the supraspinatus and infraspinatus muscles, contributing to shoulder abduction and external rotation. It also provides sensory innervation to the acromioclavicular and glenohumeral joints.
The course of the nerve
The suprascapular nerve travels through the suprascapular notch and spinoglenoid notch, making it susceptible to compression and traction injuries. The suprascapular artery and vein accompany the nerve, providing its blood supply.
Clinically, suprascapular nerve compression can lead to atrophy of the innervated muscles, and its anatomy is important in surgical procedures involving the rotator cuff.
References
Basta M, Sanganeria T, Varacallo MA. Anatomy, Shoulder and Upper Limb, Suprascapular Nerve. [Updated 2022 Oct 3]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/sites/books/NBK557880/
