Author: Roberto Grujičić MD•Reviewer: Gordana SendicLast reviewed: September 23, 2021Reading time: 2 minutes

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Flexor digiti minimi brevis muscle (Musculus flexor digiti minimi brevis)Flexor digiti minimi brevis is a short intrinsic muscle of the hand. It belongs to the group referred to as hypothenar muscles, together with abductor digiti minimi and also opponens digiti minimi muscles. Hypothenar muscles are situated on the ulnar (medial) facet of the hand whereby they form an elevation above the base of the small finger named the hypothenar eminence

Flexor digiti minimi brevis spreads from the hook that hamate bone and also flexor retinaculum to the basic of proximal phalanx that the little finger. The main role of this muscle is flexion that the little finger in metacarpophalangeal joint.

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Key facts about the flexor digiti minimi brevis muscle
OriginHook that hamate, flexor retinaculum
InsertionBase the proximal phalanx of number 5
ActionMetacarpophalangeal share 5: Finger flexion (+ finger lateral rotation/opposition)
InnervationDeep branch of ulnar nerve (C8, T1)
Blood supplyDeep palmar branch of ulnar artery

In this article, we will comment on the anatomy and role of the flexor digiti minimi brevis muscle.


Origin and also insertion

Flexor digiti minimi brevis muscle occurs by a quick tendon native the hook the hamate bone and also medial element of flexor retinaculum. From here the muscle fibers run distally and also medially, passing over the fifth metacarpophalangeal joint. The muscle inserts along with abductor digiti minimi onto the medial next of the basic of proximal phalanx that the small finger.

Relations 


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Flexor digiti minimi brevis muscle is located on the ulnar side of the palm, developing the hypothenar eminence with abductor digiti minimi and also opponens digiti minimi muscles.

The muscle is located inferior and lateral to adductor digiti minimi muscle and also superior and medial to opponens digiti minimi muscle. The proximal parts of flexor digiti minimi brevis and also abductor digiti minimi muscles type a space through which deep branches of the ulnar artery and also ulnar nerve pass. 

Innervation

The flexor digiti minimi brevis, like other hypothenar muscles, is innervated by the deep branch the the ulnar nerve (root value C8 and T1).

Blood supply

Flexor digiti minimi brevis muscle obtain its blood it is provided from the deep palmar branch the ulnar artery. 


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Function

The main function of the flexor digiti minimi brevis is flexion the the little finger at the metacarpophalangeal joint. Also, this muscle participates in lateral rotation and also opposition that the tiny finger.


Sources

References:

Palastanga, N., & Soames, R. (2012). Anatomy and also human movement: framework and duty (6th ed.). Edinburgh: Churchill Livingstone.Standring, S. (2016). Gray"s Anatomy (41tst ed.). Edinburgh: Elsevier Churchill Livingstone.Netter, F. (2014). Atlas of person Anatomy (6th ed.). Philadelphia, PA: Saunders.

Illustrations:

Flexor digiti minimi brevis muscle (Musculus flexor digiti minimi brevis) - Yousun Koh

Flexor digiti minimi brevis muscle of hand: desire to learn much more about it?

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