Hip Flexors

Question 1

Psoas Major action origin insertion and nerve innervation

Answer 1

A
With the origin fixed:
Flex the hip (coxal joint)
With the insertion fixed:
Flex the trunk toward the thigh
Tilt pelvis anteriorly
O
Bodies and transverse processes of lumbar vertebrae
I
Lesser trochanter
N
Lumbar plexus L1 -L4

Question 2

Iliacus action origin insertion and nerve innervation

Answer 2

A
With the origin fixed: Flex the hip (coxal joint)
With the insertion fixed: Flex the trunk toward the thigh
Tilt pelvis anteriorly
O
Iliac fossa
I
Lesser trochanter
N
Femoral L(1), 2, 3, 4

Question 3

Satorius action origin insertion and nerve innervation

Answer 3

A
Flex the hip (coxal joint)
Laterally rotate the hip (coxal joint)
Abduct the hip (coxal joint)
Flex the knee (tibiofemoral joint)
Medially rotate the flexed knee (T/F joint)
O
Anterior superior iliac spine (ASIS)
I
Proximal, medial shaft of the tibia at pes anserinus tendon
N
Femoral L2, 3, (4)

Question 4

Tensor fasciae latae action origin insertion and nerve innervation

Answer 4

A
Flex the hip (coxal joint)
Medially rotate the hip (coxal joint)
Abduct the hip (coxal joint)
O
Iliac crest, posterior to the ASIS
I
Iliotibial tract
N
Superior gluteal L4, 5, S1