Examine the muscles of the upper portion of the anterior (flexor) compartment of the arm (Figure 6.5). Identify the coracobrachialis muscle, short head of biceps brachii muscle , long head of biceps brachii muscle , and brachialis muscle [probe].
Retract the biceps brachii muscle and examine the attachments of the brachialis muscle. (An option is to cut the biceps brachii muscle approximately 5 to 10 cm above the elbow and reflect the upper portion of the biceps brachii muscle laterally ]). The brachialis muscle [probe] lies deep to the biceps brachii muscle [held by forceps]. The brachialis muscle originates from the anterior surface of the humerus and intermuscular septum and inserts into the coronoid process and tuberosity of the ulna.
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