Ext Of Fingers

Question 1

Extensor Digitorum

Answer 1

Origin- lat epicondyle of humerus via common extensor tendon
Insertion- via dorsal digital expansion to base of post surface distal and middle phalanges of fingers

Innervation- Radial C7-8

Question 2

Extensor Indicis

Answer 2

Origin- lower part post surface of ulna and adjacent IOM
Insertion- joins dorsal digital expansion of index finger

Innervation- Radial C7-8

Question 3

Extensor Digiti Minimi

Answer 3

Origin- lat epicondyle of humerus via common extensor tendon
Insertion- joins dorsal digital expansion of little finger

Innervation- Radial C7-8

Question 4

Extensor Pollicis Longus

Answer 4

Origin- middle 1/3 post surface of ulna and adjacent IOM
Insertion- dorsal surface base of distal phalanx of thumb

Innervation- Radial C7-8

Question 5

Extensor Pollicis Brevis

Answer 5

Origin- middle 1/3 post surface of radius and adjacent IOM
Insertion- dorsal surface base of proximal phalanx of thumb

Innervation- Radial C7-8