Figure 1: The suprascapular artery (SPA) originates from the third segment of the subclavian artery (SA), very close to the first segment of the axillary artery (AA) and passes under the superior transverse scapular ligament (STSL), together with the suprascapular nerve (SN) and over the brachial plexus (BP). TCA: Transverse cervical artery; OM: Omohyoid muscle