SIJ Dysfunction and Piriformis syndrome Flashcards
function of SIJ
transmission of force from axial skeleton to lower limb and vice versa
ligaments around SIJ
anterior sacroiliac
Sacrotuberous
sacrospinous
interosseous sacroiliac
posterior sacroiliac
nerve innervating SIJ
ventral rami of L4 L5
superior gluteal nerve
dorsal rami of L5-S2
form closure
stability bought by bones interlocking
force closure
stability achieved by muscles or ligaments
movement of SIJ
nutation and counternutation
notation and its muscles
sacrum rotates forward relative to iliac bones
erector spinae
adductor magnus
counternutation and muscles involved
sacrum rotates backward in relation to iliac bones
pectineus
adductor longus and brevis
latissimus dorsi
what contributes to force closure of SIJ
slings
what are slings
connection of the muscles when activated together they can enhance the stability of your body
anterior sling
provide stability by acting like abdominal binder compressing pelvic girdle to the front and securing symphysis pubis
-it is important when walking for stability
-adductors works in harmony with internal obliques and opposes external obliques utilizing balance of force
the forward leg will contract
muscles associated with anterior sling
external and internal oblique
adductors
posterior sling and muscles
used during single support stance
stability during walking
latissimus dorsi
thoracolumbar fascia
gluteus maximus
lateral sling and muscles
important for lateral stability while walking
contralateral quadratus lumborum
gluteus Medius
TFL and ITB
adductors
gluteus minimus
longitudinal sling and muscles
mostly used when standing for stability as well as build and release kinetic energy to help move more efficiently
erector spinae
thoracolumbar
biceps femoris
