Musculus teres minor

The tutorial focuses on the Musculus teres minor, a key muscle in the rotator cuff. It covers its origin, insertion, innervation, and function, highlighting its role in shoulder stability and movement. The muscle originates from the scapula and inserts into the humerus, receiving innervation from the axillary nerve. It aids in external rotation and adduction of the shoulder. The tutorial also compares the teres minor with other rotator cuff muscles, emphasizing its similarities with the infraspinatus and differences from the teres major.

Which of the following muscles is NOT part of the rotator cuff?

• Musculus teres minor

• Musculus supraspinatus

• Musculus biceps brachii

• Musculus subscapularis

What is the origin of the Musculus teres minor?

• Margo medialis of the scapula

• Margo lateralis of the scapula

• Tuberculum majus of the humerus

• Fasciculus posterior of the Plexus brachialis

Which nerve is responsible for the innervation of the Musculus teres minor?

• Nervus axillaris

• Nervus medianus

• Nervus radialis

• Nervus ulnaris

What is the primary function of the Musculus teres minor in shoulder movement?

• Extension

• Flexion

• External rotation

• Internal rotation

Which muscle's function is most similar to that of the Musculus teres minor?

• Musculus latissimus dorsi

• Musculus infraspinatus

• Musculus pectoralis major

• Musculus deltoideus