Review Article
Regional Blockade of the Shoulder: Approaches and Outcomes
Figure 4
Transverse ultrasound image of interscalene brachial plexus. Arrowheads outline brachial plexus roots within the interscalene groove. SCM: sternocleidomastoid muscle, IJ: internal jugular vein, CA: carotid artery, ASM: anterior scalene muscle, MSM: middle scalene muscle.