This site is intended for healthcare professionals
Login | Register (NOW FREE)

Medical search

palmar interossei (muscles, anatomy)

FREE subscriptions for doctors and students... click here
You have 3 open access pages.

The palmar interossei muscles are a group of four muscles located between the metacarpal bones. Relative to the dorsal interossei, they reside in a more superficial layer relative to the palmar surface.

The palmar interossei arise from the ulnar side of the 1st and 2nd metacarpals and the radial side of the 4th and 5th metacarpals. Each muscle independently inserts into the base of the proximal phalanx and extensor expansion of the same digit. The exception is the first palmar interosseous which inserts into the ulnar sesamoid bone of the thumb.

Their functions are varied:

  • adduction of the fingers to the midline of the hand
  • flexion of the metacarpophalangeal joints
  • extension of the interphalangeal joints

They are innervated by the deep branch of the ulnar nerve (C8, T1).

Links:

The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2016 Oxbridge Solutions LtdĀ®. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions LtdĀ® receives funding from advertising but maintains editorial independence. GPnotebook stores small data files on your computer called cookies so that we can recognise you and provide you with the best service. If you do not want to receive cookies please do not use GPnotebook.