ABSENCE OF PYRAMIDALIS MUSCLE – A CASE STUDY

Dr. Swarup P. Kulkarni1*, Dr. Vedashree A. Kalavade2 Dr. Priyanka S. Hanmane3, Dr. Abhijit B. Kumbhar4

1- Associate Professor, Dept. of Anatomy, Dr.J.J.Magdum Ayurved Medical College, Jaysingpur, Maharashtra, India

ABSTRACT

Pyramidalis muscle is often considered as rudimentary muscle in the human body. It is the muscle present in the rectus sheath at the anterior abdominal wall. During the dissection of male cadaver, there was absence of pyramidalis muscle on both the sides in the rectus sheath which covers the rectus abdominal muscle at the anterior abdominal wall. The arrangement of the other muscles in the anterior abdominal wall was normal. The pyramidalis is having less functional significance. There may not be any functional deformity of the rectus sheath or other related structures. Pyramidalis performs the function of tensing the linea alba. This muscle is variable muscle due to its percentage of absence in the human beings. Its presence in the body is also having some variations. Especially surgeons should be aware of different variations of this muscle.

Keywords: Pyramidalis, rectus sheath, rudimentary muscle, variable muscle.