Hip Flexor Muscles

Question 1

Hip Flexor Muscles

Answer 1

Psoas Major, Iliacus

Question 2

Psoas Major OIFIn

Answer 2

O: Transverse processes of lumbar vertebrae and lateral lumbar vertebral bodies
I: Lesser trochanter
F: Powerful flexor of hip, weak lateral rotator, extends lumbar vertebral column for posture
In: Lumbar spinal nerves 1, 2, and 3

Question 3

Iliacus OIFIn

Answer 3

O: Superior 1/2 of iliac fossa, inner lip of iliac crest, anterior ligaments of sacroiliac joint, superior surface of lateral sacrum
I: Converges with psoas major tendon to lesser trochanter, some fibers go to medial surface of proximal femur
F: Powerful flexor of hip, weak lateral rotator of hip
In: Branches from femoral nerve L2 and L3