Musculus coracobrachialis

The video tutorial explains the coracobrachialis muscle, its origin, path, and function. It originates from the scapula and extends to the humerus, forming part of the axilla. The muscle is innervated by the musculocutaneous nerve, which can be compressed if the muscle hypertrophies. The coracobrachialis muscle aids in arm movements such as anteversion, adduction, and internal rotation, and plays a crucial role in stabilizing the shoulder joint.

Where does the coracobrachialis muscle originate?

• Lateral epicondyle of the humerus

• Coracoid process of the scapula

• Medial surface of the humerus

• Acromion of the scapula

Which nerve innervates the coracobrachialis muscle?

• Musculocutaneous nerve

• Axillary nerve

• Ulnar nerve

• Radial nerve

What is a potential risk of excessive training of the coracobrachialis muscle?

• Muscle atrophy

• Nerve compression

• Joint dislocation

• Tendon rupture

Which movement is NOT associated with the coracobrachialis muscle?

• Anteversion

• Adduction

• External rotation

• Internal rotation

How does the coracobrachialis muscle contribute to shoulder stability?

• By anchoring the humeral head in the shoulder joint

• By reinforcing the rotator cuff

• By stabilizing the scapula

• By supporting the clavicle