Ultrasonogram of the brachial plexus region in longitudinal transducer in life beneath the muscle demonstrating the injected brachial plexus at site p1 (A) and site p2 (B). 

Abbreviation: 1, musculocutaneous nerve; 2, median nerve; 3, the ulnar nerve; 4, redial nerve; 5, axillary nerve; 6, lateral thoracic nerve; 7, suprascapular nerve and 8, subscapular nerve.