SI joint Flashcards
explain nutation, counter nutation?
ant. pelvic tilt= counter nutation
post. pelvic tilt= nutation
when we forward bend, what does the sacrum do?
nutates initially, then counter-nutates
when we back bend, what does the sacrum do?
nutates (post. pelvic tilt)
form vs. force closure?
form= passive, bones, joints, ligs force= active, mm
what is the strongest SIJ ligament that limits post. gapping?
interosseus ligament
what ligament limits anterior gapping?
ventral or anterior sacroiliac ligament
what limits counternutation? (backwards tilting)
long dorsal or posterior sacroiliac ligament
what limits nutation? (forward tilting)
sacrotuberous ligament and sacrospinous ligament
what mm directly attach to sacrum?
piriformis and biceps femoris
agg. factors of SIJ dysfucntion?
SLS, wt. bearing, standing, hopping, stairs, turning in bed, sit>stand
5 pain prov. tests:
distraction compression Gaenslen's (bow and arrow legs off table) Thigh thrust (post. hip glide) sacral thrust (push on it)
have to be pos. in how many pain prov. tests to dx SIJ?
3+
what is Gillet’s test?
have pt in SLS, then flex hip/knee on ipsilateral side and extend hip/knee. should get post. rot of ilium with flex and ant rotation of ilium with ext. palpate PSIS and S2 to feel for it
other types of ilieal dysfunction?
upslip, downslip, inflare, outflare
if pt has a long leg and problems flexing at hip?
ant. rotated ilium, use mm energies by contracting hamstrings and glutes to correct and pull posterior
