Download Posterior Forearm and Hand

Posterior Forearm and Hand
Objectives:
1. To study the muscles of the extensor region of the forearm and hand,
including their relationships, origins, insertions, actions, innervations, and
blood supply.
2. To learn the compartments under the extensor retinaculum and their
contents.
3. To study the boundaries and contents of the anatomical snuffbox.
4. To study the extensor expansions of the medial four digits.
Cutaneous vessels:
dorsal venous arch of hand
Cutaneous peripheral nerves:
posterior antebrachial cutaneous nerve
from
to
superficial radial nerve
from
to
dorsal branch of ulnar nerve
from
to
anatomical snuffbox:
tendon of medial border
tendons of lateral border
floor
roof
contents
Deep fascia:
contents under the extensor retinaculum
1s compartment
2nd compartment
3rd compartment
4th compartment
5th compartment
6th compartment
Superficial muscles of the posterior forearm:
brachioradialis
O:
I:
A:
n:
a: radial artery, radial recurrent artery
extensor carpi radialis longus
O:
I:
A:
n:
a: radial artery, radial recurrent artery
extensor carpi radialis brevis
O:
I:
A:
n:
a: radial artery, radial recurrent artery
extensor digitorum (communis)
O:
I:
A:
n:
a: posterior interosseous artery
extensor digiti minimi (quinti) (proprius)
O:
I:
A:
n:
a: posterior interosseous artery
extensor carpi ulnaris
O:
I:
A:
n:
a: posterior interosseous artery
anconeus
O:
I:
A:
n:
a: middle collateral artery, interosseous recurrent artery
Deep muscles of the posterior forearm:
supinator
O:
I:
A:
n:
a: radial recurrent and posterior interosseous arteries
Outcropping muscles of posterior forearm:
abductor pollicis longus
O:
I:
A:
n:
a: posterior interosseous artery
extensor pollicis brevis
O:
I:
A:
n:
a: posterior interosseous artery
extensor pollicis longus
O:
I:
A:
n:
a: posterior interosseous artery
extensor indicis (proprius)
O:
I:
A:
n:
a: posterior interosseous artery