Normal arborization of the deep branch of the ulnar nerve into the interossei and lumbricals

Hughes, Lowell A; Clarke, Howard M.

doi:10.1016/s0363-5023(05)80048-6

Cited by 17 publications

(11 citation statements)

References 3 publications

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“…The interosseous muscle fibers (with the exception of DI1) are among the shortest muscle fibers in the hand, with lengths of approximately 25 mm. 6,11 The muscles of the third and fourth interosseous spaces are innervated in their proximal third, 10 which means that the distal semilengths (end-plate to tendon lengths) are about twice as long as the proximal ones. The mechanism of the N1 and P1 standing waves can thus be understood as follows.…”

Section: Discussionmentioning

confidence: 99%

The contribution of the interosseous muscles to the hypothenar compound muscle action potential

McGill

Lateva

1999

Muscle Nerve

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Section: Discussionmentioning

confidence: 99%

The contribution of the interosseous muscles to the hypothenar compound muscle action potential

McGill

Lateva

1999

Muscle Nerve

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“…13 Lowell AA observed arborization of deep branch of ulnar nerve into fourth lumbrical along its distal third. 21 In the present study, the fourth lumbrical has maximum length of 7.0 cm and minimum 3.5 cm. The maximum belly circumference is 0.5 and minimum 0.2 cm.…”

Section: Fourth Lumbricalmentioning

confidence: 47%

“…20 Lowell AA observed arborization of the deep branch of ulnar nerve to third lumbrical within middle third. 21 David D. have mentioned that third lumbrical has dual innervation in 50% of upper extremity. In such cases claw hand deformity affect only little finger.…”

Section: Second Lumbrcalmentioning

confidence: 99%

Study of Lumbricals in Hand

Manjunath¹,

D²,

Sunitha³

2014

jemds

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BACKGROUND AND AIM OF THE STUDY: Lumbricals are four small fasiculi which arise from the tendons of flexor digitorumprofundus. First and second lumbricalsarise from the radial side and palmar surface of the tendons of index and middle fingers. Third lumbrical arises from adjacent sides of the tendons of middle and ring fingers. Fourtharises form adjacent sides of tendons of ring and little fingers. Each lumbrical passes to the radial side of the corresponding finger and is attached to lateral margin of dorsal digital expansion. First and second lumbricals are supplied by median nerve (C8, T1) third and fourth lumbricals by deep branch of ulnar nerve (C8, T1).The purpose of our study is to review attachment and nerve supply of lumbricals and evaluate the variation of the above mentioned objects. MATERIALS AND METHODS: The study was done at from Department of Anatomy, J.J.M. Medical College, Davangere, and S. S. Institute of Medical Sciences and Research Centre, Davangere. 40 embalmed human cadaveric hands are used for the study. Dissection of lumbricals and their nerve supply is carried out and the attachments and nerve supply noted. Photograph of each specimen was taken after the dissection with digital camera. RESULTS: Variation in the nerve supply and attachment of lumbricals was noted. CONCLUSION: These findings will be useful for surgeons who wish to specialize in hand surgery. KEYWORDS: Lumbrical. INTRODUCTION:Thelumbrical muscle is so named because it resembles the shape, size and color of an earthworm. 1 Compared to their size, they play very significant role in dynamics of the intricate movements of the fingers required for the precise work. 2 The proximal attachment of lumbricals especially first and second may predispose to the development of carpal tunnel syndrome, in those individuals whose occupation requires repetitive finger movement. 2 The tiny lumbricals provide muscular bridges and harmonise the functions between lateral band interphangeal extensor mechanism and flexor digitorum profundus, a unique occurrence which may have importance in adjusting the position of finger joints when using the hands. 3 With change in balance of power, the lumbrical tends to pull the profundus distally as it shortens the lateral band. 3 The rapidity and delicacy of lumbrical muscle action is similar to oribicularisocculi. Because of its radiovolar position with respect to metacarpophangeal joint axis and continuation into the lateral band, active contraction of the lumbrical muscle will flex and pronate the metacarpo phangeal joint and extend the interphangeal joints. These movement are helpful to the violinist in fingering the strings of his instrument hence the term 'Fiddler's muscle'. 3 The study of innervation of lumbrical helps to know the etiology in the paralysis of the muscle and in electrical stimulation, physiotherapy and plastic reconstruction in leprosy.

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“…Sobre la mano hay en la literatura descripciones de las diversas estructuras que la componen (Kaplan, 1965;Testut & Latarjet, 1969;Zancolli, 1983;Sunderland, 1985;Williams et al, 1995), además de variados artículos sobre la misma, donde se muestran padrones generales y variaciones. Sin embargo, siempre se ejecutan trabajos y revisiones para actualizar conocimientos y la temática de la inervación es de gran interés (Wallace & Coupland, 1975;Homma & Sakai, 1991,1992Hughes & Clarke, 1995;Torrez & Olave, 2008;Olave & del Sol, 2008).…”

Section: Introductionunclassified

Contribución Proximal del Nervio Ulnar para la Formación del Nervio Digital Palmar Propio Ulnar del Dedo Mínimo

Pacheco

Olave

2009

Int. J. Morphol.

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RESUMEN: La anatomía de la mano presenta padrones generales en la distribución de los nervios responsables de la inervación motora y sensitiva. Sin embargo, se encuentran variaciones que son de interés para la anatomía quirúrgica de la región. En una serie de 20 manos disecadas, en 19 (95%)observamos que el nervio digital palmar propio del lado ulnar del dedo mínimo correspondía a un ramo directo del nervio ulnar y en el caso restante (5%), de un cadáver de sexo femenino, se observó un ramo de origen antebraquial que participó en la formación del nervio digital palmar propio ulnar del dedo mínimo. Este ramo se originó desde el tronco del nervio ulnar, distal al origen del ramo dorsal de este nervio y proximal al hueso pisiforme. En su trayecto pasó a través del músculo abductor del dedo mínimo, emergiendo por la cara superficial de éste a una distancia de 11,3 mm del origen del músculo en el hueso pisiforme, uniéndose al nervio digital palmar propio del dedo mínimo, distal al hueso mencionado. A pesar que la literatura muestra diversas variaciones en la formación y distribución de los nervios en la mano, la disposición descrita es inusual y no ha sido mencionada en ella. PALABRAS CLAVE: Anatomía; Mano; Nervio ulnar; Nervio digital palmar propio ulnar del dedo mínimo.

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Normal arborization of the deep branch of the ulnar nerve into the interossei and lumbricals

Cited by 17 publications

References 3 publications

The contribution of the interosseous muscles to the hypothenar compound muscle action potential

The contribution of the interosseous muscles to the hypothenar compound muscle action potential

Study of Lumbricals in Hand

Contribución Proximal del Nervio Ulnar para la Formación del Nervio Digital Palmar Propio Ulnar del Dedo Mínimo

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