Superficial Forearm Extensors

Question 1

Extensor Carpi Radialis Longus

Answer 1

O: Lateral Epicondyle of the Humerus, Common Extensor Tendon

I: Base of the 2nd Metacarpal

A: Wrist Extension, Radial Deviation,
Weak Elbow Flexor

N: Radial Nerve (C6-7)

Question 2

Extensor Carpi Radialis Brevis

Answer 2

O: Lateral Epicondyle of the Humerus, Common Extensor Tendon

I: Base of the 3rd Metacarpal

A: Wrist Extension, Radial Deviation, Weak Elbow Flexor

N: Radial Nerve (C7-8)

Question 3

Extensor Carpi Ulnaris

Answer 3

O: Common Extensor Tendon, Proximal Posterior Ulna

I: Base of the 5th Metacarpal

A: Wrist Extension, Ulnar Deviation

N: Radial Nerve (C7-8)

Question 4

Extensor Digiti Minimi

Answer 4

O: Common Extensor Tendon

I: Middle and Distal Phalanx of the Little Finger via the Extensor Digitorum Tendon

A: Extends Little Finger

N: Radial Nerve (C7-8)

Question 5

Extensor Digitorum

Answer 5

O: Common Extensor Tendon

I: Middle and Distal Phalanx of Fingers 2-5, Dorsal Extensor Hood

A: Extends Fingers 2-5

N: Radial Nerve (C7-8)