This muscle attaches to the supraglenoid tubercle. What is the muscle?

The muscle that attaches to the supraglenoid tubercle is the biceps brachii. The supraglenoid tubercle is a small bony prominence located on the upper part of the glenoid cavity of the scapula, where the long head of the biceps brachii originates. This attachment plays a crucial role in the function of the biceps during arm movements, particularly in flexion at the elbow and supination of the forearm.

Understanding the function of the biceps brachii is important in anatomy and physiology. The muscle contributes to various upper limb activities, including lifting and pulling motions. Its involvement in stabilizing the shoulder joint, along with other rotator cuff muscles, highlights its significance in overall arm mechanics.

The other muscles listed do not have their origin associated with the supraglenoid tubercle. Pectoralis major and pectoralis minor are primarily involved with movements at the shoulder and chest, while triceps brachii originates from different points on the scapula and humerus, specifically not from the supraglenoid tubercle. Thus, the identification of biceps brachii as the correct answer is based on its specific anatomical connection to the supraglenoid