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La Le Li Lo Lu Ly
Luc Lum Lun Lus Lut

Lumbricals of the hand

These are four intrinsic small, worm-like muscles on each hand that flex the metacarpophalangeal joints and extend the interphalangeal joints. These muscles are unusual in that they do not attach to bone. Instead they attach proximally to the tendons of flexor digitorum profundus and distally to the extensor expansions. (wikipedia.org)

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