The largest elbow flexor is the biceps brachii muscle. Nerve Align Review This muscle is generally used in bending the elbows to lift objects and similar activities. The biceps muscle divides into two heads at the proximal area of the arm, resulting to two proximal insertions with two separate tendons and each having separate insertion sites. The longhead originates from the scapula at the supraglenoid tubercle; on the other hand, the short head arises from scapula’s coracoid process. Insertion site of the long head is at the forearm, at the lateral bone or the radius. The long head of the biceps brachii commonly ruptures at the proximal tendon which is accounted for 95% of bicep ruptures.
Different mechanism of injury can cause rupture of the biceps brachii muscle. Rapid stresses and excessive loading may cause acute biceps rupture. This is usually seen during weightlifting activities. Compression and friction of the tendon beneath the acromion process of the scapula, together with an underlying rotator cuff problem can lead to partial rupture of the biceps brachii muscle.
A sharp type of pain that is suddenly felt in the proximal part of the arm is a common symptom for biceps brachii muscle tear. Pain during palpation in the shoulder area or also known as tenderness is not present in this condition. A snapping sound can be heard during arm movement. During palpation, a soft mass in the area of the proximal arm can be appreciated.