abductor pollicis longus

abductor pollicis longus muscle

The Abductor pollicis longus lies immediately below the Supinator and is sometimes united with it. [WP,unvetted].

Typ Organ
Übergeordnete Struktur abductor pollicis muscle
Lateinischer Name abductor pollicis longus muscle
FMA ID 38515

Häufig gestellte Fragen

What is the abductor pollicis longus?
The abductor pollicis longus (abductor pollicis longus muscle) is a long muscle located in the posterior (extensor) compartment of the forearm. It abducts the thumb at the carpometacarpal joint and also assists with radial deviation of the wrist.
Where is the abductor pollicis longus located?
The abductor pollicis longus lies in the posterior forearm, immediately below the supinator muscle and sometimes partly united with it. Its tendon passes through the first extensor compartment of the wrist alongside the extensor pollicis brevis, traveling obliquely across the wrist to insert at the base of the first metacarpal.
What is the function of the abductor pollicis longus?
The abductor pollicis longus abducts and extends the thumb at the carpometacarpal joint, pulling the thumb away from the hand. It also assists with radial deviation (abduction) of the wrist. This muscle is essential for positioning the thumb for grip.
What conditions can affect the abductor pollicis longus?
De Quervain's tenosynovitis is a common condition where the tendon sheath of the abductor pollicis longus (and extensor pollicis brevis) becomes inflamed, causing pain over the radial (thumb) side of the wrist. This is especially common in new mothers and individuals performing repetitive thumb or wrist movements.
How is the abductor pollicis longus different from the abductor pollicis brevis?
The abductor pollicis longus is an extrinsic forearm muscle with a long tendon reaching the base of the first metacarpal, while the abductor pollicis brevis is an intrinsic hand muscle within the thenar eminence acting on the proximal phalanx of the thumb. They produce complementary abduction at different joints.

Verwandte Strukturen

mucus body coating mucous body coating mucus cocoon mucous cocoon Mullerian duct ductus paramesonephricus multi cell part structure cell part cluster multicellular anatomical structure multicellular structure multilaminar epithelium laminated epithelium multi-tissue structure multi-tissue structures multi-unit eye

Medizinischer Haftungsausschluss

Dieser Inhalt dient ausschließlich zu Bildungs- und Informationszwecken. Er ist nicht als Ersatz für professionellen medizinischen Rat, Diagnose oder Behandlung gedacht. Wenden Sie sich bei Fragen zu einem medizinischen Zustand stets an Ihren Arzt oder einen anderen qualifizierten Gesundheitsdienstleister. Ignorieren Sie niemals professionellen medizinischen Rat oder verzögern Sie dessen Einholung aufgrund von etwas, das Sie auf dieser Website gelesen haben.

Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.