Hypertrophic reversed palmaris longus muscle: a cadaveric finding

Pires, Lucas Alves Sarmento; Perissé, J.-P.; Araújo, Gabriel Costa Serrão de; Manaia, Jorge Henrique Martins; Júnior, A. Fonseca; Babinski, Márcio Antônio

doi:10.5603/fm.a2017.0102

Cited by 8 publications

(9 citation statements)

References 16 publications

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“…Inverted PL, which needs to be brought to attention due to its correlation with median nerve compression [4], has been marked as a true-positive in Shaeffer's test. The observed variations, including barely visible tendon, ramified tendon and inverted PL, fall into the category of quality variations and have been observed and described before [8,18]. Some of the observed variations, like agenesis or fascial insertions have also been described in the lower limb analogue of PL -the plantar muscle [16].…”

Section: Discussionsupporting

confidence: 52%

“…There is some research pointing out a correlation between its presence in parents and their children. Such observations of unilateral and bilateral presence of PL between generations brought the authors to conclusion that gene or set of genes responsible for PL presence would be dominant [9,10,18], although Loth describes PL absence as dominant feature, at least in white population [13]. Other researchers, focused on relations between humans and different types of primates, argue that those relations would also suggest a recessive set of genes [19].…”

Section: Discussionmentioning

confidence: 99%

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The sonographic morphology of musculus palmaris longus in humans

et al. 2018

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

The sonographic morphology of musculus palmaris longus in humans

et al. 2018

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“…In the control group there were recognized: one person with bilateral absence of PL, one person with unilateral absence (left, non-dominant), one person with bilateral presence with one muscle’s proximal insertion being aponeurosis antebrachii (right, dominant), one person with bilateral presence with one muscle (right, dominant) being inverted and one person with bilateral presence, whose muscle’s tendon ramified in the muscle’s belly in both hands. Those variations are categorized as quality variations and have been observed and described before ( Ciszek and Szaro, 2003 ; Pires et al, 2017 ).…”

Section: Resultsmentioning

confidence: 99%

Musculus Palmaris Longus: Influence on Playing Capability of Keyboard Musicians – Preliminary Report

et al. 2018

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Musculus Palmaris Longus (PL) is one of the most variable anatomical structures in the human body. Despite being biomechanically active, it is vastly considered to have no impact on the functionality of the upper extremity in the general population. The aim of this study is to examine the relation between playing capability of young musicians and morphology of Musculus PL and to compare it with the relation between manual capability of non-musicians and morphology of their Musculus PL. 42 forearms of 21 healthy individuals (11 musicians and 10 non-musicians) were subjected to Shaeffer’s test and ultrasound imaging and tested by dynamometer for hand grip strength and the first and fifth finger opposition before and after exertion. No difference in morphology pattern was observed between the groups. In the musicians, a substantial loss of a hand grip strength of the left hand compared to the right hand after exertion, regardless of lateralization, was observed. A disproportion in exhaustion of the musician’s hands with unilateral absence of PL was observed – the difference in grip strength between the dominant and non-dominant hand before and after exertion increased over eight times more than in the musicians with bilateral presence. There is no difference in PL morphology between either the musicians or non-musicians. Regardless of lateralization, the musician’s left hand in musicians seems weaker and therefore more prone to misuse related injuries. PL may play a role in musicians in balancing muscular exhaustion.

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“…Clinically, the presence of supernumerary or abnormally large muscles on the forearm may be the cause of neurovascular bundle compression. [3][4][5]7,12,15,16 The length, girth, width and the relations of the aFCUM reported herein could predispose an individual to develop compressive neuropathies of the UN not only on the Guyon's canal, but in the whole forearm instead. In addition, the distal insertion on the flexor retinaculum by the aFCUM could compromise the median nerve as well.…”

Section: Discussionmentioning

confidence: 96%

“…[4][5][6] Accessory muscles of the forearm can also mimic neuromas or soft tissue tumors, and can contribute to the onset of thrombosis and syndromes such as carpal tunnel. Knowledge of these variations are important to surgery, as most of them are discovered intraoperatively 5,7 The present work reports the presence of an accessory flexor carpi ulnaris muscle (aFCUM) in a male cadaver and discusses its clinical significance.…”

Section: Introductionmentioning

confidence: 99%

Notes on the Accessory Flexor Carpi Ulnaris Muscle: A Rare Supernumerary Variation

et al. 2019

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Variations of the forearm muscles are well described in the literature. In spite of that, reports regarding the accessory flexor carpi ulnaris muscle are scarce due to its rarity. This muscle usually originates from the medial epicondyle of the humerus with the flexor muscle mass and inserts itself into the palmar aponeurosis or the pisiform bone together with the flexor carpi ulnaris muscle. Supernumerary and anomalous muscles of the anterior compartment of the forearm have been associated with ulnar nerve and artery compression. Furthermore, they may also mimic neuromas and soft tissue tumors. The study of supernumerary muscles is necessary, as they may be an option to tendon grafts and muscle flaps. The aim of this paper is to describe the presence of the accessory flexor carpi ulnaris muscle on the left forearm of a cadaver fixated in a phenol solution and discuss its clinical and anthropological significance.

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Hypertrophic reversed palmaris longus muscle: a cadaveric finding

Cited by 8 publications

References 16 publications

The sonographic morphology of musculus palmaris longus in humans

The sonographic morphology of musculus palmaris longus in humans

Musculus Palmaris Longus: Influence on Playing Capability of Keyboard Musicians – Preliminary Report

Notes on the Accessory Flexor Carpi Ulnaris Muscle: A Rare Supernumerary Variation

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