DEEP POSTERIOR COMPARTMENT OF FOREARM-APL
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SUMMARY
1. O: oblique area of radius, ulna & interosseous membrane.
ABDUCTOR POLLICIS LONGUS
2. I: trapezium & 1st MC base.
3. NS: posterior interosseous branch of radial n.
4. A: abducts thumb & wrist. It can assist in abducting and flexing the wrist, producing a 'trick' flexion when other flexors are paralysed.
Image: Abductor pollicis longus muscle. Netter. (2014). Atlas of Human Anatomy, Sixth Edition. 6th ed. Elsevier.
Reference(s)
R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone.
Gray, H., Carter, H.V. and Davidson, G. (2017). Gray’s anatomy. London: Arcturus.
