Extensor pollicis brevis muscle

Extensor pollicis brevis muscle

Muscle infobox
Name = Extensor pollicis brevis muscle
Latin = musculus extensor pollicis brevis
GraySubject = 125
GrayPage = 455



Caption = Front of right upper extremity. (Extensor pollicis brevis labeled at upper left.)


Caption2 = Posterior surface of the forearm. Deep muscles. (Extensor pollicis brevis visible at left.)
Origin = radius
Insertion = thumb, proximal phalanx
Action = extension of thumb at metacarpophalangeal joint
Antagonist = Flexor pollicis longus muscle, Flexor pollicis brevis muscle
Blood = posterior interosseous artery
Nerve = posterior interosseous nerve
DorlandsPre = m_22
DorlandsSuf = 12548946
The Extensor pollicis brevis lies on the medial side of, and is closely connected with, the Abductor pollicis longus.

Origin and insertion

It arises from the dorsal surface of the body of the radius below that muscle, and from the interosseous membrane.

Its direction is similar to that of the Abductor pollicis longus, its tendon passing the same groove on the lateral side of the lower end of the radius, to be inserted into the base of the first phalanx of the thumb.

Action

The Extensor pollicis brevis extends the proximal phalanx.

Variations

Absence; fusion of tendon with that of the Extensor pollicis longus.


=Additional

External links

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* [http://www.ptcentral.com/muscles/musclearms.html#extensor%20pollicis%20brevis PTCentral]


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См. также в других словарях:

  • extensor pollicis brevis muscle — musculus extensor pollicis brevis …   Medical dictionary

  • Extensor pollicis longus muscle — Muscle infobox Name = Extensor pollicis longus muscle Latin = musculus extensor pollicis longus GraySubject = 125 GrayPage = 455 Caption = The mucous sheaths of the tendons on the back of the wrist. (Extensor pollicis longus visible at center… …   Wikipedia

  • extensor pollicis brevis — extensor pol·li·cis brev·is päl ə səs brev əs, päl ə kəs n a muscle that arises from the dorsal surface of the radius, extends the first phalanx of the thumb, and adducts the hand …   Medical dictionary

  • Flexor pollicis brevis muscle — Muscle infobox Name = Flexor pollicis brevis muscle Latin = musculus flexor pollicis brevis GraySubject = 126 GrayPage = 461 Caption = The muscles of the left hand. Palmar surface. (Flexor pollicis brevis visible at center right, near thumb.)… …   Wikipedia

  • Abductor pollicis brevis muscle — Muscle infobox Name = Abductor pollicis brevis muscle Latin = musculus abductor pollicis brevis GraySubject = 126 GrayPage = 461 Caption = Abductor pollicis brevis visible at center right. Origin = Transverse carpal ligament, the scaphoid and… …   Wikipedia

  • musculus extensor pollicis brevis — [TA] short extensor muscle of thumb: origin, posterior surface of radius and interosseous membrane; insertion, dorsolateral base of proximal phalanx of thumb; innervation, posterior interosseous; action, extends thumb …   Medical dictionary

  • Extensor carpi ulnaris muscle — Extensor carpi ulnaris Posterior surface of the forearm. Extensor carpi ulnaris labeled in purple at center right. Latin musculus extensor carpi ulnaris …   Wikipedia

  • Extensor pollicis muscle — may refer to:*Extensor pollicis longus muscle *Extensor pollicis brevis muscle …   Wikipedia

  • Extensor carpi radialis brevis muscle — Muscle infobox Name boobes = Extensor carpi radialis brevis Latin = musculus extensor carpi radialis brevis GraySubject = 125 GrayPage = 452 Caption = Posterior surface of the left forearm. Superficial muscles. The partially obscured extensor… …   Wikipedia

  • Flexor pollicis longus muscle — Muscle infobox Name = Flexor pollicis longus muscle Latin = musculus flexor pollicis longus GraySubject = 125 GrayPage = 449 Caption = Front of the left forearm. Deep muscles. (Flexor pollicis longus is shown in blue) Caption2 = Origin = The… …   Wikipedia


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