Central Compartment Group

Joe Muscolino

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The central compartment group of intrinsic hand muscles: adductor pollicis, lumbricals manus, palmar interossei, and dorsal interossei manus.

The Central Compartment Group of intrinsic muscles of the hand is composed of the:

 

ATTACHMENTS:

 

ACTIONS:

  • Adducts the thumb at the carpometacarpal joint (adductor pollicis).
  • Flexes fingers #2-5 at the metacarpophalangeal joints (lumbricals manus, palmar interossei, dorsal interossei manus).
  • Extends fingers #2-5 at the proximal and distal interphalangeal joints (lumbricals manus, palmar interossei, dorsal interossei manus).
  • Adducts fingers #2, #4, #5 at the metacarpophalangeal joints (palmar interossei).
  • Abducts fingers #2 and #4 at the metacarpophalangeal joints (dorsal interossei manus).
  • Radially abducts and ulnarly abducts finger #3 at the metacarpophalangeal joint (dorsal interossei manus).

 

NOTE: The muscles of the central compartment are located between the muscles of the thenar eminence and hypothenar eminence groups.