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Psoas Major

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The psoas major is a deep muscle located at the front (anterior) of the body between the lower vertebrae and the femur.

For illustration of location of the psoas major, see the page about Anterior Muscles, which can also be reached by clicking on the image opposite.

Further information about the psoas major is summarised below:

Point(s) of Origin:

Vertebrae: T12 - L4/5
(transverse processes, vertebral bodies, and discs of these vertebrae).

Point(s) of Insertion:

Lessor trochanter of the femur.

Action(s):

Flexes (bends) the hip.
Also an important stabilising muscle of the lower back; operates in conjunction with the quadratus lumborum.

This may be particularly interesting study/revision material for students following courses in Massage, Reflexology and similar courses because these generally require a good basic knowledge of the muscular structures of the arms, legs, hands and feet.

 

Diagram of human anterior muscles.


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