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2010, Número 4

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Vet Mex 2010; 41 (4)


Características anatómicas y fisiológicas de los músculos pélvicos en la coneja doméstica (Oryctolagus cuniculus)

Cruz Y, Corona-Quintanilla DL, Juárez M, Martínez-Gómez M,

Idioma: Español/Inglés
Referencias bibliográficas: 42
Paginas: 263-274
Archivo PDF: 362.52 Kb.


RESUMEN

En mamíferos, la musculatura estriada pélvica se ha relacionado con la regulación de funciones urinarias y poco se sabe de su participación en funciones reproductivas. Los objetivos del presente estudio fueron determinar las características anatómicas y la inervación de los músculos iliococcígeo y pubococcígeo de la coneja adulta, y caracterizar la actividad electromiográfica (EMG) refleja en respuesta a la estimulación genital. Para ello se utilizaron técnicas quirúrgicas y electrofisiológicas. Los resultados muestran que el iliococcígeo y pubococcígeo son músculos bilaterales que se originan en el hueso iliaco; están inervados por ramas que emergen de S3 y S4; sus fibras musculares no se adhieren a las vísceras pélvicas, sino que discurren lateral a la vagina y al recto y se insertan en las vértebras sacras. Durante la estimulación de la piel del orificio vaginal y la vagina pélvica y perineal se presentó actividad EMG refleja en ambos músculos. La estimulación de la vagina abdominal no indujo respuesta EMG. La estimulación cervical produjo inhibición temporal en la actividad del iliococcígeo y pubococcígeo. Estos resultados contribuyen a las escasas descripciones anatómicas de la musculatura pélvica de la coneja que se encuentran en libros de texto y atlas; también sugieren que los músculos pélvicos iliococcígeo y pubococcígeo podrían activarse reflejamente durante procesos reproductivos, como la cópula y el parto.


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