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Int. j. morphol ; 30(1): 136-139, mar. 2012. ilus
Article in English | LILACS | ID: lil-638774

ABSTRACT

The anatomy of the psoas minor muscle in human beings has frequently been correlated with ethnic and racial characteristics. The present study had the aim of investigating the anatomy of the psoas minor, by observing its occurrence, distal insertion points, relationship with the psoas major muscle and the relationship between its tendon and muscle portions. Twenty-two human fetuses were used (eleven of each gender), fixed in 10 percent formol solution that had been perfused through the umbilical artery. The psoas minor muscle was found in eight male fetuses: seven bilaterally and one unilaterally, in the right hemicorpus. Five female fetuses presented the psoas minor muscle: three bilaterally and two unilaterally, one in the right and one in the left hemicorpus. The muscle was independent, inconstant, with unilateral or bilateral presence, with distal insertions at different anatomical points, and its tendon portion was always longer than the belly of the muscle.


La anatomía del músculo psoas menor, en los seres humanos ha sido a menudo vinculada con cuestiones de orden étnico-raciales. Este estudio tuvo como objetivo evaluar la anatomía del músculo psoas menor en relación a su presencia, puntos de origen e inserción, relación con el músculo psoas mayor y sus porciones tendinosa y muscular. Se utilizaron 22 fetos humanos (11 de cada sexo) que fueron fijados en solución de formalina al 10 por ciento por perfusión a través de la arteria umbilical. El músculo psoas menor se encontró en 8 fetos de sexo masculino, siete bilateralmente y apenas uno unilateralmente en el hemicuerpo derecho. En los fetos de sexo femenino, cinco tenían el músculo psoas menor, tres bilateralmente y dos unilateralmente, siendo uno encontrado en el hemicuerpo derecho y otro en el izquierdo. El músculo es independiente, inconstante, de presencia unilateral o bilateral, con la inserción en diferentes sitios anatómicos y su porción tendinosa siempre mayor que el vientre muscular.


Subject(s)
Female , Gender Identity , Psoas Muscles/anatomy & histology , Psoas Muscles/growth & development , Psoas Muscles/blood supply , Fetus/anatomy & histology , Fetus/blood supply , Skeleton
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