Anatomic Association of the Proximal Fingernail Matrix to the Extensor Pollicis Longus Tendon: A Morphological and Histological Study

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Palomo-López, Patricia and Becerro de Bengoa Vallejo, Ricardo and López-López, Daniel and Calvo-Lobo, César and Herrera Lara, Manuel Eugenio and Murillo González, Jorge Alfonso and Losa-Iglesias, Marta (2018) Anatomic Association of the Proximal Fingernail Matrix to the Extensor Pollicis Longus Tendon: A Morphological and Histological Study. Journal of Clinical Medicine, 7 (12). p. 465. ISSN 2077-0383

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Official URL: https://doi.org/10.3390/jcm7120465




Abstract

Background: Extensor tendon disorders may cause severe functional impairments, and there is a lack of knowledge about their anatomic associations with the proximal fingernail matrix. Objective: To delineate the association between the distal extensor pollicis longus tendon (EPLT) insertion and the limit of the fingernail matrix in the thumb. Methods: The limit of the fingernail matrix and the distal bony insertion of the EPLT were identified in five thumbs from fresh-frozen human cadavers. An additional five thumbs were fixed and the longitudinal thumb sections were histologically analyzed.
Results: The terminal limit of the matrix and fingernail was dorsal and overlapped to the EPL tendon, which was located between the fingernail matrix and the phalanx, and extended dorsally to the distal section of the terminal phalanx in all ten thumb bodies. Conclusion: The fingernail matrix is not directly inserted into the periosteum of the dorsal section of the base to the distal phalanx, because this anatomic relationship is separated by the deep fibers of the EPLT.


Item Type:Article
Uncontrolled Keywords:nail bed; nail matrix; extensor pollicis longus tendon; nail deformity
Subjects:Medical sciences > Nursing > Podiatry
ID Code:64182
Deposited On:15 Mar 2021 17:05
Last Modified:15 Mar 2021 17:05

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