Sacrum and Innominates Flashcards
bones of innominates
ilium, ischium and pubic bones
what are the true pelvic ligaments
sacroiliac ligaments
what are the accessory pelvic ligaments
sacrotuberous ligament
sacrospinous ligament
iliolumbar ligament
sacrospinous ligament separates what
greater and lesser sciatic foramen
where do iliolumbar ligaments originate
transverse L4 L% adn attach to medial side of iliac crest
first ligament painful in lumbosacral decompensation
iliolumbar
primary pelvic mm
levator ani and coccygeus
secondary pelvic mm
iliopsoas, obturator internus, piriformis
action piriformis
externally rotates and extends thigh and abducts thigh with hip flexed
inn piriformis
S1 S2
what nerve can run through piriformis
sciatic n
innominates rotate around what axis during walking
inferior transverse axis
respiratory motion sacrum
superior transverse axis S2
inhalation posterior
exhalation anterior
craniosacral flexion what way does sacrum move
counternutate
moves posterior
postural motion sacrum
middle trasnsverse
when person bends forward, sacral base moves anterior