Forearm Anatomy

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Which of the following muscles is not part of the superficial layer of the anterior compartment of the forearm?

Flexor digitorum superficialis (correct)

Pronator teres

Flexor carpi radialis

Flexor carpi ulnaris

What is the primary action of the flexor pollicis longus in the forearm?

Flexing the thumb's interphalangeal joint (correct)

Flexing the fingers

Flexing the wrist joint

Pronation of the forearm

Which nerve primarily innervates the flexor digitorum profundus?

Musculocutaneous nerve

Median nerve

Radial nerve

Ulnar nerve (correct)

Which structure is primarily responsible for separating the anterior and posterior compartments of the forearm?

Interosseous membrane Signup and view all the answers

What is the role of the pronator teres in the forearm?

Pronation of the forearm Signup and view all the answers

Which artery primarily supplies blood to the anterior compartment of the forearm?

Brachial artery Signup and view all the answers

Which of the following muscles is included in the deep layer of the anterior compartment?

Flexor pollicis longus Signup and view all the answers

Which muscle is responsible for flexing the proximal interphalangeal joints of the fingers?

Flexor digitorum superficialis Signup and view all the answers

The deep layer muscles of the anterior compartment primarily involve which type of movement?

Flexion Signup and view all the answers

What is an action performed by the muscle flexor carpi ulnaris?

Adducts the wrist joint Signup and view all the answers

What is the primary action of the extensor carpi ulnaris (ECU)?

Extends and adducts the hand at the wrist joint Signup and view all the answers

Which nerve innervates the brachioradialis?

Radial nerve Signup and view all the answers

Which muscle is responsible for supinating the forearm?

Supinator Signup and view all the answers

What is the origin of the extensor digiti minimi?

Lateral epicondyle of the humerus Signup and view all the answers

Which artery is the larger terminal branch of the brachial artery?

Ulnar artery Signup and view all the answers

Which of the following muscles primarily extends the medial four fingers?

Extensor digitorum Signup and view all the answers

What is the insertion point for the extensor pollicis brevis (EPB)?

Dorsal aspect of the base of the proximal phalanx of the thumb Signup and view all the answers

Where does the ulnar artery cross the flexor retinaculum?

Lateral to the ulnar nerve and pisiform bone Signup and view all the answers

Which of the following is NOT a branch of the ulnar artery?

Palmar cutaneous branch Signup and view all the answers

Which blood vessels supply the posterior compartment muscles?

Radial artery, Anterior interosseous artery, Posterior interosseous artery Signup and view all the answers

Which structure is located superficial to the flexor retinaculum?

Ulnar nerve and artery Signup and view all the answers

How does the radial artery compare to the ulnar artery in size?

Smaller Signup and view all the answers

Which of the following structures does NOT supply arterial blood to the wrist?

Radial recurrent artery Signup and view all the answers

Which muscle acts to extend the distal phalanx of the thumb at the interphalangeal joint?

Extensor pollicis longus Signup and view all the answers

Which nerve supplies all muscles of the anterior compartment of the forearm except for one and a half muscles?

Median nerve Signup and view all the answers

Which of the following represents the deep layer muscles in the posterior compartment?

Supinator, APL, EPL, EPB, Extensor indicis Signup and view all the answers

Which muscles does the ulnar nerve supply?

Flexor carpi ulnaris and ulnar half of flexor digitorum profundus Signup and view all the answers

What is one of the branches of the median nerve?