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Extensor pollicis brevis muscle

extensor pollicis brevis muscle, flexor pollicis brevis muscle
In human anatomy, the extensor pollicis brevis is a skeletal muscle on the dorsal side of the forearm It lies on the medial side of, and is closely connected with, the abductor pollicis longus

Contents

  • 1 Structure
    • 11 Variation
  • 2 Function
  • 3 Additional images
  • 4 References
    • 41 Sources
  • 5 External links

Structureedit

The extensor pollicis brevis arises from the ulna distal to the abductor pollicis longus, from the interosseous membrane, and from the dorsal surface of the radius 1

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

Variationedit

Absence; fusion of tendon with that of the extensor pollicis longus

Functionedit

In a close relationship to the abductor pollicis longus, the extensor pollicis brevis both extends and abducts the thumb1 at the carpometacarpal and metacarpophalangeal joints2

Additional imagesedit

Anatomical snuff box 
Bones of left forearm Posterior aspect 
Bones of the left hand Dorsal surface 
Tendons of forefinger and vincula tendina 
Transverse section across distal ends of radius and ulna 
Transverse section across the wrist and digits 
The mucous sheaths of the tendons on the back of the wrist 
The radial and ulnar arteries 
Arteries of the back of the forearm and hand 
Extensor carpi radialis brevis muscle 
Extensor pollicis brevis muscle 
Extensor pollicis brevis muscle 
Extensor pollicis brevis muscle 
Extensor pollicis brevis muscle 
Extensor pollicis brevis muscle 
Extensor pollicis brevis muscle 
Extensor pollicis brevis muscle 
Muscle of the handPosterior view 

Referencesedit

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy 1918

  1. ^ a b Platzer 2004, p 168
  2. ^ "Thumb Articulations" ExRxnet Retrieved June 2010  Check date values in: |access-date= help

Sourcesedit

  • Platzer, Werner 2004 Color Atlas of Human Anatomy, Vol 1: Locomotor System 5th ed Thieme ISBN 3-13-533305-1 

External linksedit

  • PTCentral

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Extensor pollicis brevis muscle Information about

Extensor pollicis brevis muscle


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    29.10.2014


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