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Thenar space

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The thenar space is one of the three deep palmar spaces. It is rarely the site of hand infections. The fibrofatty space contains the first lumbrical muscle.

Relations:

  • ulnarly: midpalmar septum from border of palmar aponeurosis to palmar border of third metacarpal bone
  • radially: fascia of adductor pollicis longus muscle
  • dorsally: adductor pollicis
  • volarly: flexor tendons of index finger
  • distally: margin of synovial sheath of index finger
  • proximally: distal margin of carpal tunnel

The thenar eminence demarcates the thenar space on the palmar surface.


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