Ultrasound image of the brachial plexus

Ultrasound image of the brachial plexus and surrounding anatomy at the interscalene groove. The solid white line outlines the brachial plexus. The dashed white line outlines the superior cervical plexus.

MS: middle scalene muscle; AS: anterior scalene muscle; SCM: sternocleidomastoid muscle; IJ: internal jugular; VA: vertebral artery; C: carotid artery.

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