Scalene muscles

The video tutorial discusses the teres major muscle, highlighting its origin, insertion, innervation, and function. Unlike the teres minor, the teres major is not part of the rotator cuff. It originates from the scapula and inserts at the humerus, working closely with the latissimus dorsi. The muscle is innervated by the lower scapular or thoracodorsal nerve. It facilitates medial rotation, adduction, and retroversion of the humerus, and can cause scapular rotation.

What is the origin of the Terres Major muscle?

• Anterior surface of the scapula

• Posterior surface of the inferior angle of the scapula

• Medial border of the scapula

• Superior angle of the scapula

How does the Terres Major muscle differ from the Terres Minor?

• It originates from the clavicle

• It is part of the rotator cuff

• It attaches to the capsule of the glenohumeral joint

• It does not attach to the capsule of the glenohumeral joint

Where do the Terres Major and Latissimus Dorsi muscles insert?

• Crest of the lesser tubercle of the humerus

• Lateral epicondyle of the humerus

• Medial epicondyle of the humerus

• Greater tubercle of the humerus

Which nerve supplies the Terres Major muscle?

• Radial nerve

• Median nerve

• Lower scapular nerve or thoracodorsal nerve

• Axillary nerve

What movement does the Terres Major muscle perform at the shoulder joint?

• Abduction

• Lateral rotation

• Inward rotation

• Flexion