Muscles of the Posterior Forearm Quiz

What is the primary function of the extensor muscles in the posterior compartment of the forearm?

• Flexion of the wrist and fingers

• Abduction of the thumb

• Extension of the wrist and fingers

• Rotation of the forearm

Which muscle is the main extensor of the fingers?

• Brachioradialis

• Extensor carpi ulnaris

• Anconeus

• Extensor digitorum

Where does the extensor carpi ulnaris muscle attach?

• Base of metacarpal 3

• Base of metacarpal 5

• Base of metacarpal 2

• Base of metacarpal 1

Which muscle is responsible for supinating the forearm?

• Extensor indicis

• Extensor pollicis longus

• Abductor pollicis longus

• Supinator

What is the role of the extensor indicis muscle?

• Abducts the thumb

• Extends the index finger independently

• Flexes the index finger

• Rotates the forearm