LG3.7 Anatomy of the Antebrachial Region – Dr. Robinson Flashcards
What separates the anterior and posterior compartments of the forearm?
Interosseous membrane
What are the 5 muscles of the anterior superficial forearm?
1) Flexor carpi radialis
2) Flexor carpi ulnaris
3) Palmaris longus
4) Pronator teres
5) Flexor digitorum superficialis
Where does the anterior superficial muscles of the forearm originate?
common flexor tendon
What are the 3 deep muscles of the anterior compartment of the forearm?
1) Flexor digitorum profundus
2) Flexor pollicis longus
3) Pronator quadratus
What innervates the posterior compartment of the forearm?
Radial nerve
What are the 7 superficial muscles of the posterior forearm
1) Extensor carpi radialis brevis
2) Extensor carpi radialis longus
3) Extensor carpi ulnaris
4) Extensor digitorum
5) Extensor digiti minimi
6) Anconeus
7) Brachioraiali
Where do most of the superficial muscles of the posterior forearm originate?
Common extensor tendon
What are the deep muscles of the posterior compartment of the forearm?
1) Supinator
2) Abductor pollicis longus
3) Extensor pollicis brevis
4) Extensor pollicis longus
5) Extensor indicis
What is the action of the supinator?
Supinates forearm
What is the action of the extensor indicis?
Extends 2nd digit, and helps extend wrist
What is the action of abductor pollicis longus?
Abducts the thumb extends it at carpometacarpal joint
What is the action of the extensor pollicis brevis/longus?
Extends proximal phalanx of thumb
What is the action of the brachioradialis?
Weak flexion of the forearm and maximal hen forearm is in mid pronated position
What is the action of the extensor carpi radialis longus and brevius?
Extend and abduct hand at wrist joint
What is the action of the extensor digitorum?
Extend four digits
