Anterior region of arm

The anterior region of arm (brachium) is the flexor region. It showcases three muscles: the biceps brachii, brachialis, and coracobrachialis. These muscles are chiefly innervated by the musculocutaneous nerve, typically a branch of the brachial plexus's lateral cord.

• The biceps brachii, with its long and short heads originating from the scapula and inserting on the radial tuberosity, is responsible for forearm flexion and supination.

• The brachialis, situated deep to the biceps, originates from the anterior humerus and inserts on the ulnar tuberosity, serving as the elbow's primary flexor.

• The coracobrachialis originates from the coracoid process and inserts onto the medial humerus, assisting in arm flexion and adduction.

The compartment's main arterial supply is the brachial artery. While the median and ulnar nerves traverse this compartment, they do not innervate its muscles.