- See:
-
Intrinsic Muscles of the Hand
- origin: each from the 2 metacarpal bones between which it inserts;
- insertion:
- proximal phalanges of the 2nd, 3rd, and 4th digits & posterior
expansion of the finger extensor tendons;
- action:
- 1st abducts index finger, the 2nd radially flexes middle finger,
3rd flexes middle finger & 4th
abducts the ring finger;
- all assists in flexing proximal phalanges of index, middle and ring
fingers at metacarpophalangeal joints;
- nerve supply: palmar branch of
[ulnar
nerve,
C8 ,
T1
- synergists:
lumbrical,
Palmar Interossei ,
FDP,
FDS ;
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Movement patterns of interosseus-minus fingers.
Abductor pollicis longus transfer for replacement of first dorsal
interosseous.
Architectural design of the human intrinsic hand muscles.
