Antebrachial Fascia

The antebrachial fascia (or antibrachial fascia, deep fascia of forearm) continuous above with the brachial fascia, is a dense, membranous investment, which forms a general sheath for the muscles in this region; it is attached, behind, to the olecranon and dorsal border of the ulna, and gives off from its deep surface numerous intermuscular septa, which enclose each muscle separately.

Over the Flexor tendons as they approach the wrist it is especially thickened, and forms the volar carpal ligament.

This is continuous with the transverse carpal ligament, and forms a sheath for the tendon of the Palmaris longus which passes over the transverse carpal ligament to be inserted into the palmar aponeurosis.

Behind, near the wrist-joint, it is thickened by the addition of many transverse fibers, and forms the dorsal carpal ligament.

It is much thicker on the dorsal than on the volar surface, and at the lower than at the upper part of the forearm, and is strengthened above by tendinous fibers derived from the Biceps brachii in front, and from the Triceps brachii behind.

It gives origin to muscular fibers, especially at the upper part of the medial and lateral sides of the forearm, and forms the boundaries of a series of cone-shaped cavities, in which the muscles are contained.

Besides the vertical septa separating the individual muscles, transverse septa are given off both on the volar and dorsal surfaces of the forearm, separating the deep from the superficial layers of muscles.

Apertures exist in the fascia for the passage of vessels and nerves; one of these apertures of large size, situated at the front of the elbow, serves for the passage of a communicating branch between the superficial and deep veins.

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)

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

fascia: deltoid fascia · supraspinous fascia · infraspinous fascia
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)

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

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

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
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)

posterior: extensor retinaculum · extensor expansion

anterior: flexor retinaculum · palmar aponeurosis


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)