Abductor Pollicis Brevis
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Description[1][edit | edit source]
Abductor pollicis brevis muscle is the most lateral and superficial of the three muscles forming the thenar emirence.
Origin[2][edit | edit source]
It takes its origin from the front of transverse carpal ligament, extending into the tubercles of scaphoid and trapezium with an occasional contribution from the tendon of abductor pollicis longus.
Insertion[3][edit | edit source]
The muscle has a short tendon which attaches to the radial side of the base of the proximal phalanx of the thumb.
Nerve[edit | edit source]
Median nerve C8, T1.
Artery[edit | edit source]
Princeps pollicis artery.
Function[edit | edit source]
It acts to abduct the carpometacarpal joint of the thumb.
Clinical relevance[4][edit | edit source]
- carpal tunel syndrome.
- Median and ulnar nerve lesion.
- Syringomyelia
- Motor neurone disease
- Peripheral neuropathy
Assessment[edit | edit source]
Treatment[edit | edit source]
Resources[edit | edit source]
- ↑ Cael C. Functional anatomy. Philadelphia, PA: Wolters Kluwer/Lippincott, Williams & Wilkins; 2011.
- ↑ Palastanga N, Field D, Soames R. Anatomy and human movement. 4th ed. Oxford: Butterworth-Heinemann; 2002.
- ↑ Lippert L, Lippert L. Clinical kinesiology and anatomy. 4th ed. Philadelphia: F.A. Davis; 2006.
- ↑ Harrison M. Common problems. Neurological Skills. 1987;:63-99.
