The psoas muscle is often referred to as the most important muscle in the body, but unfortunately, most people are not even aware of its existence. This thick, rubber-band-like muscle is also tied in with the iliacus muscle that runs along the pelvic bone. Both work to create a harmonious balance in the abdominal and region. But when the psoas muscle becomes dysfunctional, that harmony is interrupted, resulting in pain and discomfort.
via www.ehow.com
One of my favorite things to do in my practice is abdominal massage, and one of the coolest things about it is introducing people, experientially, to this muscle.