Anteromedial Forearm

Question 1

Pronator Teres

Answer 1

Origin: medial epicondyle of humerus and
coronoid process of ulna

Insertion: lateral surface of midshaft radius

Action: Forearm pronation, assists with elbow flexion

Innervation: Median Nerve (C6, C7)

Question 2

Flexor Carpi Radialis

Answer 2

Origin: Medial epicondyle of humerus

Insertion: Base of 2nd and 3rd metacarpal

Action: Wrist flexion, abduction

Innervation: Median nerve (C6, C7)

Question 3

Palmaris Longus

Answer 3

Origin: Medial epicondyle of humerus

Insertion: Distal half of flexor retinaculum and palmar aponeurosis

Action: Tenses palmar aponeurosis, weak wrist flexion

Innervation: Median nerve (C7, C8)

Question 4

Flexor Carpi Ulnaris

Answer 4

Origin:
Humeral head = medial epicondyle of humerus
Ulnar head = olecranon and posterior border of ulna

Insertion: Pisiform bone, hook of hamate, base
of 5th metacarpal

Action: Wrist flexion, adduction

Innervation: Ulnar nerve (C7, C8)

Question 5

Pronator Quadratus

Answer 5

Origin: Distal 1/4 of ulna

Insertion: Distal 1/4 of radius

Action: Forearm pronation

Innervation: Median nerve - anterior interosseous (C7, C8)

Question 6

Flexor Digitorum Superficialis

Answer 6

Origin:
Humero-ulnar head = medial epicondyle of humerus and coronoid process of ulna
Radial head = superior half shaft of anterior radius

Insertion: middle phalanges of digits 2-5

Action: 2nd-5th MCP flexion, 2nd-5th PIP flexion, wrist flexion

Innervation: Median nerve

Question 7

Flexor Digitorum Profundus

Answer 7

Origin: Ulna and interosseous membrane

Insertion: Distal phalanges 2-5

Action: 2nd-5th MCP flexion, 2nd-5th DIP flexion, wrist flexion

Innervation:
Medial 1/2 = ulnar nerve (C8, T1)
Lateral 1/2 = median nerve - anterior interosseous nerve (C8, T1)

Question 8

Flexor Pollicis Longus

Answer 8

Origin: Radius and interosseous membrane

Insertion: Distal phalanx of thumb

Action: Thumb IP flexion, 1st MCP flexion

Innervation: Median nerve - anterior interosseous (C7, C)