Musculus pyramidalis

The video tutorial explains the anatomy and function of the pyramidalis muscle, a small triangular muscle in the anterior abdominal wall. It is part of the abdominal muscles group, alongside the rectus abdominis. The pyramidalis muscle is considered rudimentary in humans, with its primary function being to tense the rectus sheath. It is more developed in certain animals like koalas and kangaroos. The tutorial also covers the muscle's anatomical position, its relation to the rectus sheath, and its evolutionary significance.

What group of muscles does the pyramidalis muscle belong to?

What are the two muscles of the anterior abdominal wall mentioned in the text?

Describe the location and shape of the pyramidalis muscle.

What is the function of the rectus sheath?

Why is the pyramidalis muscle considered rudimentary in many people?