Anterior Forearm

Question 1

Pronator Teres

Answer 1

Origin: two heads - medial epicondyle and coronoid process of ulna

Insertion: midway along lateral surface of radius

Innervation: median nerve

Blood Supply: anterior ulnar recurrent artery

Action: pronates forearm and assists with elbow flexion

Question 2

Flexor Carpi Radialis

Answer 2

Origin: medial epicondyle

Insertion: base of 2nd metacarpal

Innervation: median nerve

Blood Supply: radial artery

Action: flexes hand at wrist and abducts hand at wrist

Question 3

Palmaris Longus

Answer 3

Origin: medial epicondyle

Insertion: distal 1/2 of flexor retinaculum and palmar aponeurosis

Innervation: median nerve

Blood Supply: posterior ulnar recurrent artery

Action: flexes hand at wrist and tenses palmar aponeurosis

Question 4

Flexor Carpi Ulnaris

Answer 4

Origin: humeral head - medial epicondyle and ulnar head - olecranon and posterior border of ulna

Insertion: pisiform, hook of hamate, and base of 5th metacarpal

Innervation: ulnar nerve

Blood Supply: posterior ulnar recurrent artery

Action: flexes hand at wrist and adducts hand at wrist

Question 5

Flexor Digitorum Superficialis

Answer 5

Origin: humero-ulnar head - medial epicondyle and coronoid process and radial head - superior 1/2 of anterior radius

Insertion: bodies of middle phalanges of medial 4 digits

Innervation: median nerve

Blood Supply: ulnar artery and radial artery

Action: flexes middle and proximal phalanges of medial 4 digits and flexes hand at wrist

Question 6

Flexor Digitorum Profundus

Answer 6

Origin: anterior and medial surface of proximal 3/4 ulna and interosseous membrane

Insertion: palmar base of distal phalanges of medial 4 digits

Innervation: medial half - ulnar nerve and lateral half - median nerve (anterior interosseous nerve)

Blood Supply: anterior interosseous artery

Action: flexes distal phalanges of medial 4 digits and assists with flexion of hand at wrist

Question 7

Flexor Pollicis Longus

Answer 7

Origin: anterior surface of radius and interosseous membrane

Insertion: palmar base of distal phalanx of thumb

Innervation: anterior interosseous nerve

Blood Supply: anterior interosseous artery

Action: flexes phalanges of thumb

Question 8

Pronator Quadratus

Answer 8

Origin: distal 1/4 of anterior ulna

Insertion: distal 1/4 of anterior radius

Innervation: anterior interosseous nerve

Blood Supply: anterior interosseous artery

Action: pronates forearm