mod 2- Si Flashcards
si gravity line in males and females, who stresses si more
females- same plane as sacrum
males- anterior of sacrum, increasing load on si joints
3 types of si degeneration
1- mild degen changes
- substantial degen w/o ankylosing (osophyte formation)
- SIJ ankylosing (bridging osophyte)
approx how much does the innominate bone move relative to the sacrum
0.2 degrees post
how to close pack the SIJ (2)
- post innominate rot
2. ant sacral rot (nutation)
Si pain provation tests and how many
- thigh thrust (sensative
- Iliac supine distraction
- sacral compression
- sacral thrust
- gaenslens test
How many si test do u want pos and what is the sensativity and specificity of it
sensativity- 91%
Spec- 79%
3/5
3 ligs of hip j
iliofemoral- ant, resists exten, internal rot
ischiofemoral- resisis adduction, internal rot
pubofemoral- resists abdyction external rot
normal femoral angle of inclination
125
vara <125, valga >125
what is femoral anteversion
angle of fem neck in the transverse plane
anterversion toe in
retroversion- toe out
probs of excessive antiversion
- patellar probs
- increased pronation at subtalar j
hip flexion required in getting in/out of chair and extension required in gate
chair- 80-90
gait- 10-15 extension ( if not there will be compensatory action at knee or lumbar spine)
hip flexors and optimal ranges of them
iliopsoas- strongest at 45 degrees
rectus fem- strongest at full extension (lof decreases hip flex by 17%)
max strength of extension is at
90 degrees hip flexion
strength of internal and external rotators are highest in this pos
sitting
if you stand on one leg the supporting joint is feeling
2.5-3x body weight due to glute med creating counter force
