Psoas major
musculus psoas major
With the iliacus, it flexes the thigh at the hip and stabilizes the joint. On both sides, it initiates flexion of the trunk and reduces the lumbar lordosis. It is also a postural muscle, active in standing.

In the full entry
The full entry, with every field, sources, quiz and clinical correlations, is in the atlas.
- Origin
- Insertion
- Innervation
- Blood supply
Related clinical cases
- Psoas abscess