extra Flashcards
what does the anterior band of the iliolumbar ligaments resist
ipsilateral SB and ant translation of L5
what does the superior band of the iliolumbar ligaments resist
flexion
when is the inferior band of the iliolumbar ligaments taut
extension
what does the posterior band of the iliolumbar ligaments resist
flexion
what does the facet joint not sustain
vertically apllied load in neutral positon
what is hte intradiscal pressure for someone bending down w no weight vs w a weight
w no weight = 150
w a weight = 220
what is the intradiscal pressure of osmeone sitting down vs someone sitting down and leaning forward vs someone sitting down and picking up a weight
sitting= 140
sitting w a lean= 185
sitting and picking up a weight= 275
what is the intradiscal pressure of someone laying on their back vs laying on their side
back= 25
side = 75
how much % increase in disc pressure is it if someone is laughing
40-50%
how much % increase in disc pressure is it if someone is side bending
25%
how much % increase in disc pressure is it if someone is bending forward
150%
how much % increase in disc pressure is it if someone is lifting a 20kg weight w back straight and knees bent vs knees straight
bent= 73%
straight= 169%
what are the top 2 things that increase the % in dsic pressure from movements
bedning foward and lifting a weigth w back straight and knees straight
during axial rotation what is happenign at the torsion of the disc
gapping of ipsilateral facet joint
compression of contra facet joint
what is the main things resisting axial rotation in the L spine
combine facet joint and ligaments (interspinous and suprapsinous)