deep muscles of the posterior forearm n.
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Deep muscles of the Posterior Forearm. Margene Fallon . Forearm. Deep Group anconeus supinator abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis .

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forearm
Forearm

Deep Group

  • anconeus
  • supinator
  • abductor pollicis longus
  • extensor pollicis brevis
  • extensor pollicis longus
  • extensor indicis
slide3

Except for the supinator muscle, all these deep layer muscles orginate from the posterior surfaces of the radius, ulna, and interosseous membrane and pass into the thumb and fingers.

  • All muscles of the deep layer are innervated by the posterior interosseous nerve, the continuation of the deep branch of the radial nerve.
supinator
Supinator

Originates at crest of ulna