Download Upper Limb Compartments

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Anterior Compartment of Arm
Posterior Compartment of Arm
Insertions on the bones of the forearm
Insertions on the bones of the forearm
Musculocutaneous nerve
Radial nerve
Biceps brachii
Triceps brachii
Brachioradialis * (radial nerve)
[Coracobrachialis – found in anterior
compartment but because it has its origin on the
scapula and insertion on the humerus, it causes
movement at the shoulder joint instead of the
Anterior Compartment of Forearm
Posterior Compartment of Forearm
Flexors and Pronators
Insertions usually on bones of wrist and hand
Origin tends to be medial epicondyle of humerus
Extensors, a supinator and an abductor
Insertions usually on bones of wrist and hand
Origin tends to be lateral epicondyle of humerus
Median nerve
Radial nerve
Flexor digitorum superficialis (S)
[Brachioradialis- functionally this is a muscle of
Flexor carpi radialis (S)
the anterior compartment compartment of arm]
Pronator teres (S)
Extensor carpi radialis longus (S)
Palmeris longus (S)
Extensor carpi radialis brevis (S)
Flexor carpi ulnaris * (ulnar nerve) (S)
Extensor digitorum (S)
Flexor pollicis longus (D)
Extensor carpi ulnaris (S)
Pronator quadratus (D)
Supinator (D)
Flexor digitorum profundus * (ulnar/median) (D)
Extensor pollicis longus (D)
Extensor pollicis brevis (D)
* indicates unusual innervation
Extensor indicis (D)
(S) =superficial
Abductor pollicis longus (D)