Superficial extensors of the forearm

This tutorial covers the superficial extensors of the forearm, focusing on three muscles: extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris. It details their origin, insertion, and function, emphasizing their role in hand and wrist movements. The tutorial also explains the innervation by the radial nerve, including its branches. The video encourages further learning through interactive resources.

Which side of the forearm are the superficial extensors located?

• Lateral

• Medial

• Posterior

• Anterior

What is the primary function of the extensor digitorum muscle?

• Extending the medial four digits

• Flexing the wrist

• Adducting the thumb

• Rotating the forearm

Where does the extensor digitorum muscle originate?

• Base of the 5th metacarpal

• Lateral epicondyle of the humerus

• Medial epicondyle of the humerus

• Posterior surface of the ulna

Which muscle is located on the ulnar side of the extensor digitorum?

• Brachioradialis

• Extensor digiti minimi

• Extensor carpi radialis brevis

• Flexor carpi ulnaris

What is the insertion point of the extensor carpi ulnaris?

• Distal phalanges of the fingers

• Lateral epicondyle of the humerus

• Base of the 5th metacarpal

• Base of the 2nd metacarpal

Which nerve innervates all three superficial extensors of the forearm?

• Musculocutaneous nerve

• Ulnar nerve

• Median nerve

• Radial nerve

What branch of the radial nerve supplies the superficial extensors?

• Anterior interosseous nerve

• Deep branch of the ulnar nerve

• Posterior interosseous nerve

• Superficial branch of the radial nerve