Psoas Flashcards
What is the cause of psoas syndrome?
- A forward bending (Flexion) stress of the lumbar spine- Sit-ups- Trauma- Spasm secondary to chill or draft- Viscerosomatic irritation from pelvic/abdominal organs- Flattened A-P curvature of lumbar spine (decreased lumbar lordosis)
What is the origin and insertion of the psoas muscle?
ORIGIN : Anterior surface of T12-L5 transverse processesINSERTION : lesser trochanger of femur
What is the action of the psoas muscle?
Major: Flexion thigh at highMinor: lateral rotation of thigh
What is the origin and insertion of the iliacus muscle?
ORIGIN: inner portion of each ilium, the iliolumbar ligaments, and the anterior ligaments of the sacroiliac jointsINSERTION: lesser trochanter of the femur (through the common tendon of the psoas muscle)
What is the function of the iliopsas?
Walking, Flex Femur unilateral and bilateralFlex lumbar spineUnilateral lumbar sidebendingSupport pelvis on head of femur
What is a typical patient presentation of psoas syndrome?
When a patient walks through the door, the patient leaning forward and slightly to one side, unable to stand up straight. One leg may be short (side of spasm) and one leg externally rotate (opposite side of spasm)The patient will complain of pain in the waist/low back, thoracolumbar junction, lumbosacral junction, sacroiliact joints, gluteal region, or down the leg (STOPPING at the knee)
What is the fundamental disturbance in a psoas syndrome? What does this look like?
a loss of the normal lumbar lordotic curve.This is seen as the UPPER lumbar spine to be fixed in a flexion; restricted in backward bending
If a patient is referred to you by another physician with psoas syndrome, and demonstrates the ability to bend backward, what is this not a case of?
psoas syndrome
What is the diagnostic test for a tight iliopsoas? How is the test performed?
Thomas Test; Have patient lay supine, flex both knees to chest, grab legs. Allow one leg to fall toward table top, measure distance from posterior surface of leg to table. Repeat with other leg and compare distances.
If a Thomas test is performed and the distance to the table on the right leg is greater than the left leg, what does this mean?
Either the right psoas muscle is tight or the left psoas muscle is weak/lax.
How many stages are there for psoas syndrome?
5
What does a stage one psoas syndrome case look like? Where is the dysfunction and pain?
A patient will present with a flattened lumbar lordotic curve, positive Thomas test bilaterally; and pain and restriction on hip extension. It will look like a BILATERAL spasm.The dysfunction is that the lumbar spine is flexed.The pain will be at the belt line bilaterally.
What does a stage two psoas syndrome case look like? Where is the dysfunction and pain?
A patient will present with side bending to one side. There is pain when attempt to bend to the side contralateral to spasm. It will look like a UNILATERALLY dominant SpasmThe dysfunction is that T12, L1, or L2 is flexed in non-neutral position with the remainder of the spine below curving with the concavity toward the site of the spasm. The pain will be at the belt line, on the side of the unilateral spasm.
What does a stage three psoas syndrome case look like? Where is the dysfunction and pain?
A patient will present with side bending to one side. There is pain when attempt to bend to the side contralateral to spasm. Plus, the findings of a backward torsion (positive Spring test; positive backward bending test). It will look like a UNILATERALLY dominant spasm WITH SACRAL TORSION.The dysfunction is that T12, L1, or L2 is flexed in non-neutral position with the remainder of the spine below curving with the concavity toward the site of the spasm. PLUS, engagement of a sacral axis on the side of the unilateral spasm. Usually this is a BACKWARD sacral torsion and the pelvis shifts to SIDE CONTRALATERAL to spasm. The pain will be at the lumbosacral junction, on the side of the unilateral spasm.
What does a stage four psoas syndrome case look like? Where is the dysfunction and pain?
The patient will present with stage three psoas syndrome findings [side bent and sacral torsion] plus foot externally rotated on side of the piriformis spasm and tenderness in buttocks on side of piriformis spasm.The dysfunction will be a stage three dysfunction plus CONTRALATERAL piriformis spasm. The pain will follow the pelvic shift and move to the side of the piriformis spasm at the SI joint, hip and buttocks.
