Superiorly, the fleshy portion of the pyramidalis muscle passes upward, diminishing in size as it ascends, and ends by a pointed extremity which is inserted into the linea alba, midway between the umbilicus and pubis.

The inferior and superior epigastric arteries supply blood to the pyramidalis muscle.

It may be absent on one or both sides; the lower end of the rectus then becomes proportionately increased in size.

[citation needed] The pyramidalis muscle tenses the linea alba when contracting.

[citation needed] While making the longitudinal incision for a classical caesarean section, the pyramidalis muscle is used to determine midline and location of the linea alba.