摘要
The importance of the tibialis anterior muscle in infantile orthopedic transposition surgeries, as in myelomemngoceles, it bases this research about the neurovascular pedicles of the tibialis anterior muscle. The study was conducted on 34 legs of human cadavers that were one year old or younger at the time of death. It was observed that the tibialis anterior muscle most frequently presented from 7 to 10 arterial branches (52.4%). In 97.1% of cases these branches were derived from the anterior tibial artery. In one case the anterior tibial artery was missing and the muscle was supplied by the fibular artery. Thirty-nine and seven tenths percent of arterial branches entered the superior third of the muscle; the middle third received 40.1% of the branches and the inferior third received 20.2% of the branches. Thedeep fibular nerve exclusively supplied the innervation, which in91.2% of cases, gave off from 2 to 4 branches to the muscle, mainly to the superior (46.2%) and middle third (43.0%). Most frequently, there were two neurovascular pedicles supplying the superior third and one supplying the middle third. La importancia del m迆sculo tibial anterior en cirug赤as de transposici車n ortop谷dica en ni os, as赤 como en casos de mielomeningocele, fundamenta su estudio respecto a sus ped赤culos neurovasculares. El estudio se realiz車 en 34 miembros inferiores de cad芍veres de ni os de un a o o menos de edad. Se observ車 que el m迆sculo tibial anterior presentaba con frecuencia 7 a 10 ramas arteriales (52,4%). En 97,1% de los casos estos ramos eran derivados de la arteria tibial anterior. En dos casos, la arteria tibial anterior estaba ausente y el m迆sculo supli車 su irrigaci車n con la arteria fibular. En relaci車n a la entrada de las ramas, 39,7% lo hacen en el tercio superior del m迆sculo. El tercio medio recibe 40,1% de las ramas y el tercio inferior recibe 20,2% de ellas. El nervio fibular profundo es la fuente principal de inervaci車n, en 91,2% de los casos provee 2 a 4 ramos para el m迆sculo, de ellos el 46,2% termina en el tercio superior y el 43% en el tercio medio. Con mayor frecuencia, existen dos ped赤culos neurovasculares supliendo el tercio superior y uno supliendo el tercio medio del m迆sculo tibial anterior.