%0 Journal Article
%T Unilateral Third/Accessory Head of the Gastrocnemius Muscle: a Case Report Tercera Cabeza Unilateral del M¨²sculo Gastrocnemio: Reporte de un Caso
%A Mitesh R Dave
%A Vaishali Kiran Yagain
%A Samir Anadkat
%J International Journal of Morphology
%D 2012
%I Sociedad Chilena de Anatom¨ªa
%X The superficial muscle group of the posterior compartment of leg forms a powerful muscular mass in the calf. The two-headed gastrocnemius is the most superficial muscle of this group, and forms the proximal, most prominent part of the calf. Gastrocnemius muscle exhibits numerous variations in the origin and/or insertion. The present report describes the incidental occurrence of the third/accessory head of gastrocnemius muscle in the left lower limb. During routine educational dissection of a 54-year old American female cadaver in the Anatomy lab of the Medical University of the Americas, Nevis, West Indies, we found an unusual 10.8 cm long muscle in the left popliteal region, attached proximally to the lateral aspect of the popliteal surface of femur, and distally terminated as a tendon which was attached at the junction of the medial and lateral heads of gastrocnemius muscle. No such variation was found on the right side. This is described as a case of third / accessory head of gastrocnemius muscle. El grupo muscular superficial del compartimento posterior de la pierna forma una poderosa masa muscular. El m¨²sculo gastrocnemio de dos cabezas es el m¨¢s superficial de este grupo y forma la parte proximal, m¨¢s prominente de la pantorrilla. El m¨²sculo gastrocnemio presenta numerosas variaciones en el origen y/o inserci¨®n. El informe describe la presencia de una tercera/accesoria cabeza del m¨²sculo gastrocnemio, encontrada. durante una disecci¨®n de rutina en un cad¨¢ver de una mujer americana de 54 a os, en el Laboratorio de Anatom¨ªa de la Medical University of the Americas, Nevis, West Indies. La variaci¨®n muscular inusual med¨ªa 10,8 cm de longitud y se originaba en la regi¨®n popl¨ªtea izquierda, proximalmente en la cara lateral de la superficie popl¨ªtea del f¨¦mur, y se insertaba en un tend¨®n que se adher¨ªa a la uni¨®n de las cabezas medial y lateral del m¨²sculo gastrocnemio. La variaci¨®n no se encontr¨® en el lado derecho. Este hallazgo se describe como un caso de tercera/accesoria cabeza del m¨²sculo gastrocnemio.
%K Tercera/accesoria cabeza del m¨²sculo gastrocnemio
%K Popl¨ªtea
%K Tensor de la fascia sural
%K Plantar
%K S¨®leo
%K Third/Accessory head of gastrocnemius
%K Popliteal
%K Tensor fascia suralis
%K Plantaris
%K Soleus
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300048