Palmar aponeurosis

Palmar aponeurosis

Infobox Anatomy
Name = PAGENAME
Latin = aponeurosis palmaris
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Caption = The palmar aponeurosis.
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DorlandsPre = a_53
DorlandsSuf = 12146754
The palmar aponeurosis (palmar fascia) invests the muscles of the palm, and consists of central, lateral, and medial portions.

Central portion

The central portion occupies the middle of the palm, is triangular in shape, and of great strength and thickness.

Its apex is continuous with the lower margin of the transverse carpal ligament, and receives the expanded tendon of the Palmaris longus.

Its base divides below into four slips, one for each finger. Each slip gives off superficial fibers to the skin of the palm and finger, those to the palm joining the skin at the furrow corresponding to the metacarpophalangeal articulations, and those to the fingers passing into the skin at the transverse fold at the bases of the fingers.

The deeper part of each slip subdivides into two processes, which are inserted into the fibrous sheaths of the Flexor tendons. From the sides of these processes offsets are attached to the transverse metacarpal ligament.

By this arrangement short channels are formed on the front of the heads of the metacarpal bones; through these the Flexor tendons pass. The intervals between the four slips transmit the digital vessels and nerves, and the tendons of the Lumbricales.

At the points of division into the slips mentioned, numerous strong, transverse fasciculi bind the separate processes together.

The central part of the palmar aponeurosis is intimately bound to the integument by dense fibroareolar tissue forming the superficial palmar fascia, and gives origin by its medial margin to the Palmaris brevis.

It covers the superficial volar arch, the tendons of the Flexor muscles, and the branches of the median and ulnar nerves; and on either side it gives off a septum, which is continuous with the interosseous aponeurosis, and separates the intermediate from the collateral groups of muscles.

Lateral and medial portions

The lateral and medial portions of the palmar aponeurosis are thin, fibrous layers, which cover, on the radial side, the muscles of the ball of the thumb, and, on the ulnar side, the muscles of the little finger; they are continuous with the central portion and with the fascia on the dorsum of the hand.

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Look at other dictionaries:

  • palmar aponeurosis — n an aponeurosis of the palm of the hand that consists of a superficial longitudinal layer continuous with the tendon of the palmaris longus and of a deeper transverse layer called also palmar fascia …   Medical dictionary

  • palmar fascia — n PALMAR APONEUROSIS * * * aponeurosis palmaris …   Medical dictionary

  • transverse bundles of palmar aponeurosis — fasciculi transversi aponeurosis palmaris; see under fasciculus …   Medical dictionary

  • aponeurosis palmaris — [TA] palmar aponeurosis: bundles of fibrous tissue radiating toward the bases of the fingers from the tendon of the palmaris longus muscle; called also Dupuytren or volar fascia …   Medical dictionary

  • Aponeurosis — Saltar a navegación, búsqueda Una aponeurosis es una variedad de tendón en forma de lámina aplanada. Sus fibras de tejido conectivo son blancas y brillantes, y son histológicamente semejantes a las de tendones comunes, pero tienen menor… …   Wikipedia Español

  • Palmar menor — Saltar a navegación, búsqueda El palmar menor o Palmar largo (según nomenclatura internacional) es un músculo localizado delante del palmar mayor (o flexor radial del carpo). Se origina en la epitroclea y se inserta en la aponeurosis superficial… …   Wikipedia Español

  • aponeurosis palmar — Fascia que rodea los músculos de la palma. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • Aponeurosis — Aponeuroses (plural of aponeurosis: απο, away or of , and νευρον, sinew ) are layers of flat broad tendons. They have a shiny, whitish silvery color, and are histologically similar to tendons, but are very sparingly supplied with blood vessels… …   Wikipedia

  • aponeurosis — A fibrous sheet or flat, expanded tendon, giving attachment to muscular fibers and serving as the means of origin or insertion of a flat muscle; it sometimes also performs the office of a fascia for other muscles. [G. the end of the muscle where… …   Medical dictionary

  • Palmar menor — Está localizado delante del palmar mayor. Se origina en la epitroclea y se inserta en la aponeurosis superficial de la muñeca y el ligamento anular anterior del carpo. Actúa como flexor de la muñeca …   Enciclopedia Universal

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