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

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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Questions (1)

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(OBQ08.3) Which of the following unipennate muscles takes its origin on the radial side of the profundus tendon, inserts on the radial lateral band at the middle phalanx, and creates a force vector that is palmar to the joint axis of the metacarpophalangeal joint? Review Topic

QID: 389
1

1st lumbrical

65%

(1819/2811)

2

1st dorsal interosseous

6%

(170/2811)

3

4th dorsal interosseous

3%

(84/2811)

4

4th lumbrical

20%

(571/2811)

5

4th palmar interosseous

5%

(145/2811)

L 3

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