Psoas muscles

From Biology-Online Dictionary | Biology-Online Dictionary

psoas muscles

A powerful flexor of the thigh at the hip joint (psoas major) and a weak flexor of the trunk and lumbar spinal column (psoas minor). Psoas is derived from the greek psoa, the plural meaning muscles of the loin. It is a common site of infection manifesting as abscess (psoas abscess). The psoas muscles and their fibres are also used frequently in experiments in muscle physiology.