Course 2 Muscle List

Question 1

Brachioradialsi

Answer 1

Origin: Lateral supracondylar ridge of humerus, lateral intermuscular septum of the arm

Insertion: (proximal to) styloid process of radius

Action: Elbow joing: Forearm flexion (when semi-pronated)

Innervation: Radial nerve (C5-C6)

Question 2

ECRL / ECRB

Answer 2

Extensor Carpi Radialis Longus

Origin: lateral supracondylar ridge of humerus, lateral intermuscular septum of arm

Insertion: posterior aspect of base of metacarpal bone 2

Actions: wrist joints: hand extension, hand abduction (radial deviation)

Innervation: radial nerve (C5-C8)

Extensor Carip Radilais Brevis

Origin: lateral epicondyle of humerus (common extensor tendon)

Insertion: posterior aspect of base of metacarpal bone 3

Innervation: Radial nerve (C5-C6)