left psoas major
Muscular systemAbdomenLeftFMA22343
Nomenclature
left psoas major
musculus psoas major (Latin)
grande psoas sinistro (Italian)
Descriptionentry
Deep muscle of the posterior abdominal wall; with iliacus it forms the iliopsoas.
Functionentry
Flexion of the hip; flexes the trunk; stabilises the lumbar spine.
Originentry
Bodies and transverse processes of vertebrae T12-L5 and the intervening discs.
Insertionentry
Lesser trochanter of the femur, by the common iliopsoas tendon.
Innervationentry
Anterior rami of lumbar nerves L1-L3.
Blood supplyentry
Lumbar arteries and common iliac artery.
Clinical notes
Site of psoas abscess; contracture causes a fixed flexion attitude of the hip.
Part of
Related structures
Model