Lateral compartment of forearm

Question 1

brachioradialis

Answer 1

• origin:lateral supracondylar ridge of the humerus
• insertion: lateral aspect of distal radius proximal to styloid process
• action: accessory flexor of forearm at elbow

Question 2

extensor carpi radialis longus

Answer 2

• origin: lateral supracondylar ridge of the humerus
• insertion: base of 2nd metacarpal
• action: extends and abducts the hand at the wrist joint

Question 3

extensor carpi radialis brevis

Answer 3

• origin: lateral epicondyle of humerus:common extensor tendon
• insertion: base of third metacarpal
• action: extends and abducts hand at wrist joint