Encyclopedia entry
Abductor Pollicis Brevis
Abstract
The abductor pollicis brevis is often divided into outer and inner parts, or it may receive slips from the navicular bone or styloid process of the radius. A third head arising from opponens pollicis has been reported. An accessory slip is frequently found joining the muscle with abductor pollicis longus. More rarely, accessory slips connect abductor pollicis with palmaris longus, extensor carpi radialis longus, accessory extensor carpi radialis, opponens or flexor pollicis brevis.
The abductor pollicis brevis is often divided into outer and inner parts, or it may receive slips from the navicular bone or styloid process of the radius. A third head arising from opponens pollicis has been reported. An accessory slip is frequently found joining the muscle with abductor pollicis longus. More rarely, accessory slips connect abductor pollicis with palmaris longus, extensor carpi radialis longus, accessory extensor carpi radialis, opponens or flexor pollicis brevis.
A cutaneous slip is frequently present attached to the skin over the proximal part of the thenar eminence, and inserted distally on the radial side of the first phalanx. The absence of abductor pollicis has been reported. Syn.: m. abductor externus (Sömmerring).
Riferimenti dell’opera originale
Elenco riportato come compare nella fonte, senza normalizzazione dei formati bibliografici.
- Brottet, -. (1876) Long abducteur du pouce, surnuméraires. Lyon Med. 21:475.
- Henle, J. (1871) Handbuch der Muskellehre des Menschen, in Handbuch der systematischen Anatomie. Verlag von Friedrich Vieweg und Sohn., Braunschweig.
- Macalister, A. (1875) Additional observations on muscular anomalies in human anatomy (third series), with a catalogue of the principal muscular variations hitherto published. Trans. Roy. Irish Acad. Sci. 25:1- 134.
Anatomical classification
- Systems:
- Muscular system
Content provenance
Adaptation
Adaptation of «Abductor Pollicis Brevis — Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System» by Ronald A. Bergman, Adel K. Afifi, Ryosuke Miyauchi. Source: https://www.anatomyatlases.org/AnatomicVariants/MuscularSystem/Text/A/08Abductor.shtml Original work distributed under the CC BY-NC-SA 4.0 licence (https://creativecommons.org/licenses/by-nc-sa/4.0/deed.it). Adaptation by Redazione AIVA. Changes from the original: Testo originale inglese riprodotto integralmente e riorganizzato nel formato scheda del portale (sintesi, testo, riferimenti), senza modificarne le affermazioni. La traduzione italiana non è ancora stata eseguita, e la pagina lo dichiara. Le figure non sono state copiate: sono collegate alla pagina d’origine. This publication is not approved or endorsed by the authors of the original work.
Licence
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