Question

What is the origin of extensor carpi radialis brevis muscle?

1) Lateral epicondyle of humerus
2) Base of metacarpal III
3) Medial epicondyle of humerus
4) Base of metacarpal IV

Answer 1

The extensor carpi radialis brevis muscle originates from the lateral epicondyle of the humerus and is responsible for extending and abducting the hand at the wrist.

Step-by-step explanation:

The extensor carpi radialis brevis muscle originates from the lateral epicondyle of the humerus. It is one of the muscles found in the superficial posterior compartment of the forearm. This muscle is responsible for extending and abducting the hand at the wrist.