chapter 17 pelvis Flashcards
what is the function of the pelvis
supports weight of body through the vertebral column
receives ground forces when foot contacts the ground
what are the bones structure of the pelvis
Sacrum
Coccyx
Two pelvic (hip) bones each with:
Ilium
Ischium
Pubis
define the lumbosacral joint
L5 & S1
disk & vertebral bodies : cartilaginous joint &
2 facet joints: synovial joints
define the sacroiliac joint
nonaxial synovial joints
define the symphysis joint
Cartilaginous joint
what is the function of the sacroiliac joint
Transmit weight from the upper body through the vertebral column to the hip bones
Designed for stability (not mobility)
2-3 mm motion
the sacrum were does it articulates
Articulates with L5 at an angle called the “lumbosacral angle”
the posterior side of sacrum define the auricular surface
forms SI Joint b/n sacrum and ilium)
superior articular process define
forms Lumbosacral joint – between L5 & Sacrum
what does psis and the attachment
posterior superior iliac spine attachment for posterior SI ligaments
the posterior inferior iliac spine the attachment
sacro-tuberous ligament
the ischial tuberosity function
weight bearing surface when you are sitting
interosseous sacroiliac function
Deepest, shortest, and strongest of the sacroiliac ligaments.
Connects the tuberosity of the ilium to the sacrum
short posterior sacroiliac
Prevents forward movement of the sacrum
long posterior sacroiliac
Prevents downward movement of sacrum
what are the function of the sacrotuberous
Attachment for gluteus maximus
Prevents forward rotation of the sacrum
Strong, triangular-shaped
Running from
Between the PSIS and PIIS
Posterior and lateral side of the sacrum inferior to auricular surface
Coccyx