College of Massage Therapists of British Columbia (CMTBC) Practice Exam

Which muscle attaches to the supraglenoid tubercle?

1. pectoralis minor

2. pectoralis major

3. biceps brachii

4. triceps brachii

The correct answer is: biceps brachii

The muscle that attaches to the supraglenoid tubercle is the biceps brachii. This specific anatomical feature is located on the scapula just above the glenoid cavity, which is the shallow socket that articulates with the head of the humerus to form the shoulder joint. The long head of the biceps brachii originates from the supraglenoid tubercle, playing a crucial role in the muscle's function during elbow flexion and shoulder stabilization. By attaching to this bony prominence, the biceps brachii is positioned to effectively contribute to movements such as lifting and pulling. Other muscles listed do not connect to the supraglenoid tubercle. For example, the pectoralis major and minor are primarily involved in movements of the shoulder and chest area, but they attach to different bony landmarks. Similarly, the triceps brachii has its points of origin on the humerus and scapula but does not connect to the supraglenoid tubercle. This distinction emphasizes the unique role and positioning of the biceps brachii with regard to shoulder anatomy and function.