An EMT measures the blood pressure of a female patient. EMT listens with the stethoscope over the brachial artery as he deflates the cuff.

Toddler with positional deformity of hand and arm (birth-Erb's palsy).

Three parts of the axillary artery. 1, lateral border of the first rib to medial border of pectoralis minor; 2, posterior pectoralis minor; 3, lateral border of pectoralis minor to inferior border of teres major.

Transverse MRI of arm at mid humerus: BB, biceps brachii; BV, brachial vessels/nerves; MT, medial head of triceps; BC, brachialis; T, deltoid tuberosity; H, humerus; D, deltoid; LAT, lateral head triceps; LT, long head triceps; LI, lateral intermuscular s

Anterior view of the nerves that make up the brachial plexus (ventral rami, superior, middle and inferior tunks, lateral posterior and medial cords, axillary nerve, musculocutaneus nerve, radial nerve, median nerve and ulnar nerve).

Deep layers of anterior forearm muscles.

Posterior wall of axilla.

Anterior view of the posterior wall of axilla, musculocutaneous nerve and posterior cord; pectoralis major and minor muscle and the lateral and medial cords are reflected, and the arteries, veins, and median and ulnar nerves are removed.

Anterior view of the deep flexors of the digits and related structures.

Posterior mediastinum viewed from the right: parietal pleura is intact on left side, and partially removed on right. A portion of esophagus, between bifurcation of trachea and diaphragm, is also removed.

Brachial artery (red) and median nerve (yellow) anomalies. In 307 limbs studied, both primitive brachial arteries persisted in 5% (left image), the posterior in 82% (middle image), and the anterior in 13% (right image).

(Left) Boy with positional deformity of hand and arm (birth-Erb's palsy); (right) anatomy of brachial plexus region showing damage to the cervical nerve roots.

Brachial artery & nerves of arm in situ