MSK, Week 3 (14.3 The Front of the Forearm: Superficial)

Question 1

Pronator Teres

Answer 1

Origin:

1. Ulnar head (coronoid process)
2. Humeral head (medial epicondyle of humerus- common flexor origin)

Insertion:
Middle convexity of lateral surface of radius

Innervation: median nerve (C6, C7)

Action:
Pronates and flexes forearm at elbow

Question 2

Flexor Carpi Radialis (FCR)

Answer 2

Origin:
Medial epicondyle of humerus (common flexor origin)

Insertion:
Base of 2nd metacarpal

Innervation:
Median nerve (C6, C7)

Action:
Flexes and abducts hand at wrist

Question 3

Palmaris Longus

Answer 3

Origin:
Medial epicondyle of humerus (common flexor origin)

Insertion:
Distal half of flexor retinaculum and apex of palmar aponeurosis

Innervation:
Median nerve (C7, C8)

Action: 
Flexes hand (at wrist) and tenses palmar aponeurosis

Question 4

Flexor Carpi Ulnaris (FCU)

Answer 4

Origin:

1. Humeral head (medial epicondyle of humerus- common flexor origin)
2. Ulnar head (olecranon and posterior border of ulna via aponeurosis)

Insertion:
Pisiform, hook of hamate, 5th metacarpal

Innervation:
Ulnar nerve (C7, C8)

Action:
Flexes and adducts hand at wrist