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The biceps arm (shoulder biceps)
Last reviewed: 18.10.2021
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The biceps arm muscle (m.biceps brachii) has two heads - short and long.
A short head (caput breve) begins with the coracoid-brachial muscle at the apex of the coracoid process of the scapula. The long head (caput longum) originates on the supraarticular tubercle of the scapula with a long tendon that perforates the capsule of the shoulder joint from above (being covered in the joint cavity by the synovial membrane) and exits to the shoulder, where it lies in the intertubercular furrow.
At the middle of the shoulder, both heads are connected to a common abdomen of a spindle-shaped shape, which passes into a tendon that attaches to the tuberosity of the radius. From the anterior medial surface of the tendon, a well-defined fibrous plate separates the aponeurosis of the biceps (aponeurosus m.bicipitis brachii), the bundles of which pass downward and medially interlace in the fascia of the forearm.
The function of the biceps arm (shoulder biceps): bends the shoulder in the shoulder joint; flexes the forearm in the elbow joint; Inside forearm turned inward (supination).
Innervation of the biceps arm (shoulder biceps): musculocutaneous nerve (CV-CVIII).
Blood supply to the biceps arm (shoulder biceps): brachial artery, upper and lower collateral ulnar arteries, recurrent radial artery.