2 – Anatomy of the suprascapular nerve

The suprascapular nerve origins from the superior trunk of the brachial plexus

It runs under the superior transverse scapular ligament and innervates the supraspinatus and infraspinatus muscles

The superior transverse scapular ligament creates a bridge across the scapular notch and converts the notch to an aperture

The suprascapular nerve runs below the ligament

The suprascapular artery and vein pass superior across the ligament