The Psoas Major and the Iliacus
Muscles
Testing Position in AG :Testing Position in AG : Short- Short-
sitting, Hands should be holding sitting, Hands should be holding
on to the edge of the tableon to the edge of the table
Resistance:Resistance: Applied to the Applied to the
proximal knee on the anterior proximal knee on the anterior
surface of the thighsurface of the thigh. .
Gravity minimized (GM):Gravity minimized (GM): side- side-
lying position with the lower lying position with the lower
limb supported on a powder limb supported on a powder
board; the hip is in neutral board; the hip is in neutral
rotation, and the knee is flexed rotation, and the knee is flexed
90 degrees90 degrees
The Psoas Major and the Iliacus
Muscles
•Palpation:
•Psoas Major: With the subject seated and bent
forward to relax the abdominal muscles, place
fingers deep into the abdomen below the ribs
and above the iliac crest, gently pushing
toward the posterior abdominal wall
•Iliacus: It is difficult to palpate
The Psoas Major and the Iliacus
Muscles
•Substitution:
•Use of sartorius will result in hip abduction
& ext rotation in addition to flex.
•Use of tensor fascia lata will result in hip
abduction & int rotation in addition to flex.
Sartorius Muscle
Testing Position in AG :Testing Position in AG : Short sitting Short sitting
with the pelvis in posterior pelvic with the pelvis in posterior pelvic
tilt and both knees flexed to 90 tilt and both knees flexed to 90
degrees off the edge of the tabledegrees off the edge of the table
Resistance:Resistance: Applied to the medial Applied to the medial
malleolus to resist hip lateral malleolus to resist hip lateral
rotation and on the lateral surface of rotation and on the lateral surface of
the thigh proximal to the knee to the thigh proximal to the knee to
resist flexion and abductionresist flexion and abduction..
Gravity minimized (GM):Gravity minimized (GM): Subject lies Subject lies
supine with the heel of the test limb supine with the heel of the test limb
on the opposite ankle; the non test on the opposite ankle; the non test
limb is limb is in the anatomicalin the anatomical
Sartorius Muscle
Testing Position in AG :Testing Position in AG : Short sitting Short sitting
with the pelvis in posterior pelvic with the pelvis in posterior pelvic
tilt and both knees flexed to 90 tilt and both knees flexed to 90
degrees off the edge of the tabledegrees off the edge of the table
Resistance:Resistance: Applied to the medial Applied to the medial
malleolus to resist hip lateral malleolus to resist hip lateral
rotation and on the lateral surface of rotation and on the lateral surface of
the thigh proximal to the knee to the thigh proximal to the knee to
resist flexion and abductionresist flexion and abduction..
Gravity minimized (GM):Gravity minimized (GM): Subject lies Subject lies
supine with the heel of the test limb supine with the heel of the test limb
on the opposite ankle; the non test on the opposite ankle; the non test
limb is limb is in the anatomicalin the anatomical