lecture 5: sacrum

Increased size & # of ridges

Thickened capsule

Accessory articulations

what are the adaptive changes of the SI joint during the 3rd decade

sacroiliac joint

these joints are not present at birth, they develop functionally

-not totally symmetric

Ferguson's angle

another name for the lumbosacral angle; should be about 35 degrees

anterior portion of the sacral base

sacral motion is always named for what this part of the sacrum is doing

middle transverse axis

the functional axis of sacral nutation and counternutation in the standing position.

superior transverse axis

The hypothetical Axis around which the sacrum moves during respiration. Involuntary sacral motion which occurs during Cranial sacral flexion and extension occurs around this axis

unilateral flexion or extension

-bilaterals are physiologic

name the non-physiologic sacral dysfunctions

anterior torsions

left on left, right on right

what sacral diagnosis is physiologic neutral

posterior torsions

left on right, right on left

what sacral diagnosis is physiologic, non neutral

If there is NO springing allowed = Non-neutral condition (aka Backward torsion) or unilateral/bilateral sacral extension

what is a positive spring test?

If there is springing allowed = Neutral condition (aka Forward torsion) or unilateral /bilateral sacral flexion

what is a negative spring test?

•If sacral sulcus asymmetry (or ILA asymmetry) becomes less prominent with extension of the L5, then the sacrum is forward bent/flexed

what is a negative sphinx test?

•If sacral sulcus asymmetry (or ILA asymmetry) becomes more prominent with extension of the L5, then the sacrum is backward bent/extended

what is a positive sphinx test?