Updated: 2/12/2018

Lumbricals

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Origin FDP tendon
Insertion Radial lateral band of the extensor expansion (tendon)
Action Extends PIP and DIP joint.
Innervation

1nd & 2nd lumbricals innervated by median nerve
3rd & 4th lumbicals innervated by ulnar nerve

Arterial Supply Palmar 1 - 3: Palmar metacarpal arteries

 
 

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