Musculus teres major

The video tutorial discusses the teres major muscle, its origin, anatomical connections, and functions. It explains how the teres major is part of the dorsal shoulder muscles but not the rotator cuff. The muscle originates from the back of the shoulder blade and is closely linked to the latissimus dorsi, forming the posterior armpit fold. The teres major is innervated by nerves from the brachial plexus and is responsible for internal rotation, adduction, and retroversion of the arm.

Which muscle group does the teres major belong to?

• Dorsal shoulder muscles

• Abdominal muscles

• Rotator cuff muscles

• Ventral shoulder muscles

What is the primary attachment point of the teres major muscle?

• Shoulder joint

• Inferior angle of the scapula

• Medial border of the scapula

• Lateral epicondyle of the humerus

How do the teres major and latissimus dorsi muscles contribute to the shoulder joint?

• They are part of the rotator cuff

• They form the posterior armpit fold

• They stabilize the shoulder joint

• They form the anterior armpit fold

Which nerve is responsible for the innervation of the teres major muscle?

• Radial nerve

• Ulnar nerve

• Median nerve

• Subscapularis nerve

What movement does the teres major muscle facilitate when it contracts?

• External rotation of the arm

• Extension of the wrist

• Internal rotation of the arm

• Flexion of the elbow