Chapter 6 - Innominate and Sacrum Flashcards
True pelvic ligaments
Anterior, posterior, and interosseous SI ligaments
Accessory pelvic ligaments - w/ origins and insertions
Sacrotuberous - ILA –> ischial tuberosity
Sacrospinous - sacrum –> ischial spines
Iliolumbar - TP of L4-L5 –> medial iliac crest
Pelvic ligament that divides the greater and lesser sciatic foramen
Pelvic ligament that is FIRST painful in lumbosacral decompensation
Sacrospinous
Iliolumbar
Pelvic diaphragm muscles
Also called ___ pelvic muscles
Levator ani
Coccygeus
“TRUE”
Piriformis - origin and insertion
Actions?
O = inferior anterior sacrum I = greater trochanter
Externally rotate thigh
Extends and Abducts WHEN FLEXED
Piriformis hypertonicity - subject to what?
Pain to where?
Sciatic pain
To the KNEE (not below)
Axis for innominate rotation
Inferior transverse (S4)
Axis for sacral respiratory movement
Superior transverse (S2)
Axis for sacral craniosacral movement
This motion is called ____
Superior transverse (S2) - same as respiratory
Inherent (craniosacral)
Axis for sacral postural movement (flexion/extension)
At terminal flexion of the sacrum, _____
Middle transverse (S3)
The sacrotuberous ligaments become taut, pulling the sacral base posteriorly
While walking on the LEFT leg, the sacrum moves about a ____ axis
While walking on the RIGHT leg, the sacrum moves about a ____ axis
This motion is called ____
LEFT oblique axis
RIGHT oblique axis
Dynamic
Anterior innominate SD - cause?
Posterior innominate SD - cause?
Tight quadriceps
Tight hamstrings
Other names for superior innominate shear (2)
Causes (2)
Innominate upslip, Superior innominate subluxation
Fall on buttock, mis-step
Superior pubic shear - causes (2)
Abnormal test findings? (3)
Trauma
Tight rectus abdominus
Superior pubic bone
Positive standing flexion test
ASIS compression restriction
Inferior pubic shear - causes (2)
Abnormal test findings?
Trauma
Tight adductors
Inferior pubic bone
Positive standing flexion test
ASIS compression restriction