Study of Human Pyramidalis Muscle in Pakistani Population.

Abstract

This study was carried out in 120 human subjects in the area of Bahawalpur using cadavers, autopsy specimens and operation theatre observations. Incidence of absence of pyramidalis muscle turned out to be 33.4%, having equal size, shape and attachment of muscle on both sides of the midline. Mostly muscle were pyramid in shape except in one pair where it was quadrilateral. No supernumerary muscle was seen. In view of available literature about this muscle a speculation could be ascertained regarding its regressive nature in the evaluation history, Electromyographic studies of this muscle may establish its present status in reference to functional utility of this muscle with linea alba.