An Aberrant Flexor Digiti Minimi Brevis Manus Muscle

Georgiev, G; Jelev, Lazar

doi:10.1016/j.jhsa.2011.09.002

Cited by 9 publications

(7 citation statements)

References 8 publications

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“…It has limited action in carpal flexion; therefore its absence does not lead to loss of function in the forearm or hand and has limited clinical significance. The presence of aberrant structures in the forearm and wrist is known to be an important factor for the development of syndromes of nerve and vessel compression (Georgiev and Jelev, 2007;Slavchev and Georgiev, 2013;Georgiev and Jelev, 2011). The fibro-tendinous band reported herein arched over the ulnar artery and nerve just before they entered the canal of Guyon and the median nerve just before the carpal tunnel.…”

Section: Discussionmentioning

confidence: 77%

A RARE CASE OF BILATERAL FLEXOR CARPI ULNARIS VARIATION: ANATOMICAL AND CLINICAL CONSIDERATIONS AND LITERATURE REVIEW. Un caso raro de variación bilateral del músculo flexor carpi ulnaris-significado anatómico y clínico y revisión literaria

Iliev

Георгиев

Landzhov

2016

Rev Arg de Anat Clin

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RESUMENVarios músculos y estructuras fibro-tendinosas aberrantes se han identificado en la parte anterior de la muñeca, muchas de las cuales se considera que pueden causar síndromes de compresión neurovascular. A continuación describimos una estructura relacionada con el músculo flexor carpi ulnaris. Durante disecciones de rutina de ambos miembros superiores de cadáveres de adultos fue descubierta una estructura fibro-tendinosa con forma de medialuna en ambos miembros originando de la parte lateral del tendón distal del flexor carpi ulnaris. Esta estructura formaba un arco pasando sobre y cubriendo la arteria y el nervio ulnar antes de que entren en el canal de Guyon, y sobre el nervio mediano justo antes de que entre en el canal carpal. Este arco fibro-tendinoso seguía estrechándose hasta entrelazarse con el ligamento transverso del carpo y las fibras longitudinales de la aponeurosis palmar. En este mismo caso el músculo palmaris longus estaba ausente en ambas manos. Esta conexión entre el arco fibro-tendinoso y el nervio mediano, la arteria y el nervio ulnar en la muñeca posiblemente puede causar compresión neurovascular durante cierta actividad muscular. Palabras clave: músculo flexor carpi ulnaris; variación; significado clínico ABSTRACTVarious aberrant muscles and fibro-tendinous structures have been identified in the anterior wrist, some of them blamed to be possible causes for neurovascular compression syndromes. Herewith, we describe such an intriguing structure related to the flexor carpi ulnaris muscle. During routine dissection of both upper limbs of an adult cadaver, an interesting crescent-shaped fibro-tendinous structure was identified bilaterally, arising broadly from the lateral side of the distal tendon of the flexor carpi ulnaris. This aberrant structure arched over the ulnar artery and nerve before they enter the canal of Guyon and the median nerve just before the carpal tunnel. Further distally, the fibro-tendinous arch narrowed and interlaced with the flexor retinaculum and palmar aponeurosis longitudinal fibres. In this case there was also concomitant bilateral absence of the palmaris longus muscle. Because this aberrant fibro-tendinous arch has very close relations to the median nerve, and ulnar nerve and artery in the wrist, it may possibly cause neurovascular compression during some muscle activity.

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Section: Discussionmentioning

confidence: 77%

A RARE CASE OF BILATERAL FLEXOR CARPI ULNARIS VARIATION: ANATOMICAL AND CLINICAL CONSIDERATIONS AND LITERATURE REVIEW. Un caso raro de variación bilateral del músculo flexor carpi ulnaris-significado anatómico y clínico y revisión literaria

Iliev

Георгиев

Landzhov

2016

Rev Arg de Anat Clin

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Section: May Believes That Various Anatomical Variations Can Be Attrimentioning

confidence: 98%

“…I would like to point out that their presence is described in details in the largest anatomy textbooks, as well as in my previous articles; (b) second, according to the author, variations of the hypothenar muscles are randomly reported, especially those of the flexor digiti minimi brevis muscle. In my previous works (Georgiev & Jelev, ; Georgiev & Jelev, ; Georgiev & Jelev, ; Georgiev, Jelev, & Surchev, ), I have reviewed the literature for previously described variations of both abductor and flexor muscles of the little finger of the hand, stating that variations of the abductor, and extremely rarely the flexor, are widely discussed in the literature. A new type of muscle included both muscle variations, termed “deep abductor flexor” of the little finger is proposed that combines variations of both muscles; and (c) third, I believe that the use of only one term describing supernumerary hypothenar muscles as “long abductor digiti minimi” for surgical practice could not be accepted—in my opinion the two muscles are perfectly described in anatomical and surgical books, sometimes I have even found some difficulties in separating them during anatomical dissections.…”

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confidence: 99%

Hypothenar muscles—A popular object of anatomy and surgery and some misdescriptions

Georgiev

2020

Clinical Anatomy

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“…Macalister (1875) has already described numerous anatomical variations of the flexor digiti minimi brevis, such as its absence, or evidence of the presence of a palmar accessory belly, the presence of a belly inserting in the metacarpal bone, and its fusion with the abductor digiti minimi muscle. Other authors described its origin from the antebrachial fascia, fusion with the opponens digiti minimi muscle, and the substitution of the flexor digiti minimi brevis by a tendinous sheath, originating from the flexor carpi ulnaris muscle, and inserting in the fifth proximal phalanx and in the hamate bone, just like the presence of an accessory flexor digiti minimi brevis muscle (GEORGIEV and JELEV, 2011;GEORGIEV, JELEV and KINOV, 2010;MADHAVI and HOLLA, 2003).…”

Section: Case Reportmentioning

confidence: 99%

Anatomic variation of the flexor digiti minimi brevis muscle: a morphological and functional study: case report

et al. 2015

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Introduction: A great amount of accessory and supernumerary muscles, or even their absence, has already been described in medical literature, related to Anatomy, Surgery and Radiology. In the majority of cases, muscles with any morphological changes, in their origins, insertions, number of muscle bellies and anomalous vascular or nervous patterns, are asymptomatic. However, approximately 3% of compression neuropathy cases are results of an anomalous muscle. Material and methods: During a routine dissection, an anatomical variation was found on the left hypothenar region of an afrodescendant adult's corpse, which led the authors to further investigate its incidence and the clinical significance of this variation, basing up of articles published in refereed journals and renowned books on this subject. Results: Many authors have already identified numerous muscle variations in the hypothenar region, whether in dissection labs or in private clinics. Since some muscular variations may cause numerous clinical symptoms, it's important to have a detailed anatomical knowledge of the correspondent region. There are cases of ulnar nerve compression caused by an anomalous flexor digiti minimi brevis described in the medical literature. The majority of authors explained the nervous and vascular compression from some factors as injury, small repetitive traumas, genetically predetermined muscle size and muscular hypertrophy. Conclusion:The importance of differential diagnosis to any affections of the hypothenar region lies on the anatomical and surgical knowledge of the structures quoted in this study, the statistics related to the prevalence of these anatomical variations and the relevance of these in the present case.

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An Aberrant Flexor Digiti Minimi Brevis Manus Muscle

Cited by 9 publications

References 8 publications

A RARE CASE OF BILATERAL FLEXOR CARPI ULNARIS VARIATION: ANATOMICAL AND CLINICAL CONSIDERATIONS AND LITERATURE REVIEW. Un caso raro de variación bilateral del músculo flexor carpi ulnaris-significado anatómico y clínico y revisión literaria

A RARE CASE OF BILATERAL FLEXOR CARPI ULNARIS VARIATION: ANATOMICAL AND CLINICAL CONSIDERATIONS AND LITERATURE REVIEW. Un caso raro de variación bilateral del músculo flexor carpi ulnaris-significado anatómico y clínico y revisión literaria

Hypothenar muscles—A popular object of anatomy and surgery and some misdescriptions

Anatomic variation of the flexor digiti minimi brevis muscle: a morphological and functional study: case report

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