Innervation of the extensor carpi radialis longus muscle in brazilian individuals: Biometry of its origin and distribution Inervación del músculo extensor radial largo del carpo en individuos brasileños: Biometría de su origen y distribución

© 2019, Universidad de la Frontera. All rights reserved.The extensor carpi radialis longus muscle (ECRLm) is located in the posterior compartment (extensorsupinator) of the forearm and has great importance in the closure of the hand. There are few biometric studies with respect to the point of origin of their branches of innervation, as well as on the distribution of them. For this study, 30 upper limbs, formalized, of Brazilian adult individuals were used, from the Faculty of Medicine of the Universidad Estadual de Ciencias da Saúde de Alagoas, Maceió, Brazil. After locating the nerve, we measured the distance between the origin of the primary branch and that of the motor points with respect to biepicondilar line (BEl), which were visualized and dissected using a magnifying glass. The nerve in question was observed at the level of the arm or proximal to BEl in 28 cases (93%) and the remaining 2 at the level of this line (7%). The branches for the ECRLm originated from the radial nerv