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The Central Compartment Group of intrinsic muscles of the hand is composed of the:
- The muscles of the hypothenar eminence group attach from the transverse carpal ligament and the hamate and pisiform to the little finger.
- 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.