Person:
Catón Vázquez, Francisco Javier

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First Name
Francisco Javier
Last Name
Catón Vázquez
URI
https://hdl.handle.net/20.500.14352/78873
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Medicina
Department
Anatomía y Embriología
Area
Anatomía y Embriología Humana
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2020 - 20242
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Author: Murillo González, Jorge Alfonso × Subject: 611 ×

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Now showing 1 - 2 of 2
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    An Accessory Abductor Digiti Minimi as Possible Risk Factor of the Median and Ulnar Nerves Compression
    (International Journal of Morphology, 2020) Catón Vázquez, Francisco Javier; Martínez Sanz, Elena; Morán Morán, Julio; López Fernández, Pedro; Murillo González, Jorge Alfonso
    During routine dissection of a left upper limb of a 68-year-old male human cadaver, an unusual muscle was observed originating from the radius and flexor retinaculum, and continued in the hypothenar region with the muscle belly of the abductor digiti minimi. We checked that it was an accessory abductor digiti minimi (ADM). Its muscular belly was in close relation to the median and ulnar nerves. We review the literature regarding such muscle variations and discuss the potential for compression of the median and ulnar nerves. Although the accessory ADM is usually asymptomatic and only rarely results in nerve compression, it should be taken into account by surgeons when establishing a differential diagnosis in the compression neuropathies of the median and ulnar nerves. An ultrasound scanning can help establish the differential diagnosis.
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    Development of the Interosseous Muscles of the Human Hand: Morphological and Functional Aspects of the Terminal Insertion
    (Cells, tissues, organs, 2024) Maldonado Bautista, Estela; Martínez Sanz, Elena; Catón Vázquez, Francisco Javier; Arráez Aybar, Luis Alfonso; Barrio Asensio, María Del Carmen; Naredo, Esperanza; Murillo González, Jorge Alfonso; Mérida Velasco, José Ramón
    Introduction: To date, there have been no studies conducted on the development of interosseous muscles (IO) in the human hand. This study aimed to investigate the development of these muscles in order to clarify their terminal insertions and their relationship with the metacarpophalangeal joints. Methods: Serial sections of 25 human specimens (9 embryos and 16 fetuses) between the 7th and 14th week of development, sourced from the Collection of the Department of Anatomy and Embryology at UCM Faculty of Medicine, were analysed bilaterally using a conventional optical microscope. Results: Our findings revealed that, during the 7th week of development, the metacarpophalangeal interzone mesenchyme extended into the extensor apparatus of the fingers. Furthermore, we observed that the joint capsule and the tendon of the IO derive from the articular interzone mesenchyme. By the end of the 7th week, corresponding to Carnegie stage 21, the myotendinous junction appeared, initiating cavitation of the metacarpophalangeal joint. During the fetal period, the terminal insertions of the IO were identified: both the dorsal interosseous (DI) and palmar interosseous (PI) muscles insert into the metacarpophalangeal joint capsule and establish a connection with the volar plate located at the base of the proximal phalanx and the extensor apparatus. Some muscle fibres also attach to the joint capsule at the level of the proximal synovial cul-de-sac. The functional implications of these findings are discussed within this work. Conclusion: This study provides the first detailed description of the development of the interosseous muscles in the human hand.