Updated: 11/4/2021

Lumbrical Muscles

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https://upload.orthobullets.com/topic/10051/images/Lumbricals_moved.jpg
Summary

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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