Medically reviewed by Kimberly Brown, MD Fact checked by Khara Scheppmann The iliopsoas muscle is the major flexor of your hip joint. It’s made up of two muscles: the iliacus, the psoas major.

Psoas major vs. minor muscles. The psoas minor is another muscle in your core. It starts at the cartilage that connects the last bone in your mid-spine and the first bone in your lower spine.

Some people also include the psoas minor in the iliopsoas, but only 40 to 60 percent of people have this relatively weak, unnecessary spinal flexor, and it really doesn’t matter anyway, as it ...

Psoas (soh-uhs) sounds like a terrible exotic disease that you could contract at the Summer Olympics, but it’s really just a muscle that can cause major back pain. The. Breaking News - Serving ...

A new spalacotheriid mammal preserved with a complete postcranium and a partial skull has been discovered from the Yixian Formation 1,2,3 of Liaoning, China. Spalacotheroid symmetrodonts 4,5,6,7,8 ...