Anterior Forearm

Question 1

Pronator Teres

Answer 1

Origin:
Humeral head: medial epicondyle
Ulnar head: Coronoid process of ulna
Insertion: Lateral surface of radius
Action:
Pronation of forearm at the proximal radioulnar joint, flexion of the forearm at the elbow joint
Innervation: Median nerve

Question 2

Flexor carpi radialis

Answer 2

Origin: Medial epicondyle of humerus
Insertion: Bases of metacarpal bones 2-3
Action: Wrist flexion, wrist abduction
Innervation: Median nerve

Question 3

Palmaris longus

Answer 3

Origin: Medial epicondyle of humerus
Insertion: Flexor retinaculum, palmar aponeurosis
Action: Wrist flexion
Innervation: Median nerve

Question 4

Flexor carpi ulnaris

Answer 4

Origin: Medial epicondyle of humerus, olecranon and posterior border of ulna
Insertion: Pisiform bone, hamate bone, base of metacarpal bone 5
Action: Wrist flexion, wrist adduction
Innervation: ulnar nerve

Question 5

Flexor digitorum superficialis

Answer 5

Origin:
Humeroulnar head: Medial epicondyle of humerus, coronoid process of ulna
Radial head: Proximal half of anterior border of radius
Insertion: Sides of middle phalanges of digits 2-5
Action:
Metacarpophalangeal and proximal interphalangeal joints 2-5: Finger flexion
Innervation: Median nerve

Question 6

Flexor digitorum profundus

Answer 6

Origin: Proximal half of anterior surface of ulna, interosseous membrane
Insertion: Palmar surfaces of distal phalanges of digits 2-5
Action:
Metacarpophalangeal and interphalangeal joints 2-5: Finger flexion
Innervation:
Digit 2-3 Anterior antebrachial interosseous nerve
Digit 4-5 Ulnar nerve

Question 7

Flexor pollicis longus

Answer 7

Origin: Anterior surface of radius and interosseous membrane
Insertion: Palmar surface of distal phalanx of thumb
Action: Thumb flexion
Innervation: Anterior antebrachial interosseous nerve

Question 8

Pronator quadratus

Answer 8

Origin: Distal anterior surface of ulna
Insertion: Distal anterior surface of radius
Action: forearm pronation
Innervation: Median nerve