DEEP POSTERIOR COMPARTMENT OF FOREARM-APL

SUMMARY

ABDUCTOR POLLICIS LONGUS
1. O: oblique area of radius, ulna & interosseous membrane.2. I: trapezium & 1^st 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.