Medial Intermuscular Septum of Arm

The medial intermuscular septum, thicker than the lateral intermuscular septum, extends from the lower part of the crest of the lesser tubercle of the humerus below the Teres major, along the medial supracondylar ridge to the medial epicondyle; it is blended with the tendon of the Coracobrachialis, and affords attachment to the Triceps brachii behind and the Brachialis in front.

It is perforated by the ulnar nerve, the superior ulnar collateral artery, and the posterior branch of the inferior ulnar collateral artery.

This article incorporates text from a public domain edition of Gray's Anatomy.

List of muscles of upper limbs (TA A04.6, GA 4.432)
Shoulder

deltoid · rotator cuff (supraspinatus, infraspinatus, teres minor, subscapularis) · teres major

fascia: deltoid fascia · supraspinous fascia · infraspinous fascia
Arm
(compartments)
anterior coracobrachialis · biceps brachii · brachialis
posterior triceps brachii · anconeus · articularis cubiti
fascia axillary sheath · axillary fascia · brachial fascia · intermuscular septa (lateral, medial)
other spaces (quadrangular space, triangular space, triangular interval)
Forearm
anterior

superficial: pronator teres · palmaris longus · flexor carpi radialis · flexor carpi ulnaris · flexor digitorum superficialis

deep: pronator quadratus · flexor digitorum profundus · flexor pollicis longus
posterior

superficial: mobile wad (brachioradialis, extensor carpi radialis longus and brevis) · extensor digitorum · extensor digiti minimi · extensor carpi ulnaris

deep: supinator · anatomical snuff box (abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus) · extensor indicis
fascia bicipital aponeurosis · common tendons (extensor, flexor) · antebrachial fascia
other cubital tunnel
Hand
lateral volar thenar (opponens pollicis, flexor pollicis brevis, abductor pollicis brevis) · adductor pollicis
medial volar hypothenar (opponens digiti minimi, flexor digiti minimi brevis, abductor digiti minimi) · palmaris brevis
intermediate lumbrical · interossei (dorsal, palmar)
fascia

posterior: extensor retinaculum · extensor expansion

anterior: flexor retinaculum · palmar aponeurosis

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco (m, s, c)/cong (d)/tumr, sysi/epon, injr

proc, drug (M1A/3)


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