The frontal plane spinal action of the psoas major is fairly clear; it crosses the spinal joints laterally, so it lateral flexes the spine to that side.
Psoas Major Function: Hip Joint Actions – Sagittal Plane
Note: This is the third blog post article in a series of 11 articles on Psoas Major Function. See below for the other articles in this series on psoas major function. The hip joint is a triaxial joint that allows …
