The flexor digiti minimi brevis is a hypothenar muscle in the hand that flexes the little finger (digit V) at the metacarpophalangeal joint. It lies lateral to the abductor digiti minimi when the hand is in anatomical position.
The flexor digiti minimi brevis arises from the hamulus of the hamate bone and the palmar surface of the flexor retinaculum of the hand. It is inserted into the medial side of the base of the proximal phalanx of digit V. It is separated from the abductor digiti minimi, at its origin, by the deep branches of the ulnar artery and the ulnar nerve. The flexor digiti minimi brevis is sometimes not present; in these cases, the abductor digiti minimi is usually larger than normal.
The flexor digiti minimi brevis is one of three muscles in the hypothenar muscle group. These three muscles form the fleshy mass at the base of the little finger, and are solely concerned with the movement of digit V. The other two muscles that make up the hypothenar muscle group are the abductor digiti minimi and the opponens digiti minimi. In anatomical position from medial to lateral is the abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi.
Innervationedit
The flexor digiti minimi brevis, like other hypothenar muscles, is innervated by the deep branch of the ulnar nerve. The ulnar nerve arises from the spinal nerve levels C8-T1. The spinal roots of C8 and T1 then merge to form the lower trunk, anterior division, medial cord, and finally produce the ulnar nerve. The ulnar nerve has a superficial and deep branch, but it is the deep branch that innervates the flexor digiti minimi brevis.
Actionsedit
The flexor digiti minimi brevis flexes the little finger at the metacarpophalangeal joint.
Etymologyedit
The name of this muscle is Latin for the 'short flexor of the little finger'. Note that brevis is usually included to differentiate it from a longus muscle of the same name. The flexor digiti minimi longus, however, is not found in the typical human, but instead is a rare anatomical variation.[1]
This article incorporates text in the public domain from page 464 of the 20th edition ofGray's Anatomy(1918)
Anatomy & Physiology The Unity of Form and Function. Seventh Edition. McGraw Hill.
Atkins, S.E, B. Logan, and D. A. McGrouther. "The Deep (Motor) Branch of the Ulnar Nerve: A Detailed Examination of Its Course and the Clinical Significance of Its Damage." The Journal of Hand Surgery. SAGE Journals, 14 Aug. 2008. <http://jhs.sagepub.com/content/34/1/47.full>.
^Greiner, TM (November 2008). "An additional flexor of the fifth digit: flexor digiti minimi longus". Clinical Anatomy. 21 (8): 792–3. doi:10.1002/ca.20588. PMID 18712855. S2CID 36777689.
flexor, digiti, minimi, brevis, muscle, hand, muscle, foot, flexor, digiti, minimi, brevis, muscle, foot, this, article, includes, list, references, related, reading, external, links, sources, remain, unclear, because, lacks, inline, citations, please, help, i. For the muscle of the foot see Flexor digiti minimi brevis muscle of foot This article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations Please help improve this article by introducing more precise citations June 2015 Learn how and when to remove this message The flexor digiti minimi brevis is a hypothenar muscle in the hand that flexes the little finger digit V at the metacarpophalangeal joint It lies lateral to the abductor digiti minimi when the hand is in anatomical position Flexor digiti minimi brevisThe muscles of the left hand Palmar surfaceDetailsOriginHamate boneInsertionPalmar side of the base of the proximal phalanx of fifth digitArteryUlnar arteryNerveDeep branch of ulnar nerveActionsFlexes little fingerAntagonistExtensor digiti minimi muscleIdentifiersLatinmusculus flexor digiti minimi brevis manusTA98A04 6 02 063TA22530FMA37383Anatomical terms of muscle edit on Wikidata Contents 1 Structure 2 Innervation 3 Actions 4 Etymology 5 Additional images 6 ReferencesStructure editThe flexor digiti minimi brevis arises from the hamulus of the hamate bone and the palmar surface of the flexor retinaculum of the hand It is inserted into the medial side of the base of the proximal phalanx of digit V It is separated from the abductor digiti minimi at its origin by the deep branches of the ulnar artery and the ulnar nerve The flexor digiti minimi brevis is sometimes not present in these cases the abductor digiti minimi is usually larger than normal The flexor digiti minimi brevis is one of three muscles in the hypothenar muscle group These three muscles form the fleshy mass at the base of the little finger and are solely concerned with the movement of digit V The other two muscles that make up the hypothenar muscle group are the abductor digiti minimi and the opponens digiti minimi In anatomical position from medial to lateral is the abductor digiti minimi flexor digiti minimi brevis and opponens digiti minimi Innervation editThe flexor digiti minimi brevis like other hypothenar muscles is innervated by the deep branch of the ulnar nerve The ulnar nerve arises from the spinal nerve levels C8 T1 The spinal roots of C8 and T1 then merge to form the lower trunk anterior division medial cord and finally produce the ulnar nerve The ulnar nerve has a superficial and deep branch but it is the deep branch that innervates the flexor digiti minimi brevis Actions editThe flexor digiti minimi brevis flexes the little finger at the metacarpophalangeal joint Etymology editThe name of this muscle is Latin for the short flexor of the little finger Note that brevis is usually included to differentiate it from a longus muscle of the same name The flexor digiti minimi longus however is not found in the typical human but instead is a rare anatomical variation 1 Additional images editThis gallery of anatomic features needs cleanup to abide by the medical manual of style Galleries containing indiscriminate images of the article subject are discouraged please improve or remove the gallery accordingly June 2015 nbsp Bones of the left hand Volar surface nbsp Cross section through the middle of the forearm nbsp Transverse section across the wrist and digits nbsp Flexor digiti minimi brevis nbsp The radial and ulnar arteries nbsp Ulnar and radial arteries Deep view nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Flexor digiti minimi brevis muscle nbsp Muscles of hand Cross section References edit nbsp This article incorporates text in the public domain from page 464 of the 20th edition of Gray s Anatomy 1918 Anatomy amp Physiology The Unity of Form and Function Seventh Edition McGraw Hill Atkins S E B Logan and D A McGrouther The Deep Motor Branch of the Ulnar Nerve A Detailed Examination of Its Course and the Clinical Significance of Its Damage The Journal of Hand Surgery SAGE Journals 14 Aug 2008 lt http jhs sagepub com content 34 1 47 full gt Greiner TM November 2008 An additional flexor of the fifth digit flexor digiti minimi longus Clinical Anatomy 21 8 792 3 doi 10 1002 ca 20588 PMID 18712855 S2CID 36777689 Portal nbsp Anatomy Retrieved from https en wikipedia org w index php title Flexor digiti minimi brevis muscle of hand amp oldid 1223647860, wikipedia, wiki, book, books, library,
