Question

Which action is performed my most muscles in the posterior compartment of the forearm?

A) flexion
B) extension
C) supination
D) pronation

Answer 1

The main action performed by most muscles in the posterior compartment of the forearm is extension, which involves straightening the fingers or wrist.

Step-by-step explanation:

The muscles in the posterior compartment of the forearm primarily perform the action of extension. This compartment contains muscles like the extensor radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris, all of which are responsible for extending the wrist and fingers. When these muscles contract, they facilitate movements such as straightening the fingers or wrist, which is the opposite action of flexion performed by the anterior compartment muscles.