chapters 17 & 18 Flashcards
Which 4 bones make up the pelvic girdle?
Sacrum, coccyx, & both hip bones
What makes up the hip bones?
Ilium, ischium, & pubis
What are the 3 articulations of the pelvic girdle?
Lumbosacral, sacroiliac, & symphysis pubis
Synovial, nonaxial, plane joint. No voluntary motion. Designed for stability not mobility
Sacroiliac (si) joint
Contains the pelvis surface & coccyx. Is made of 5 fused sacral vertebrae.
Sacrum
The superior part of the hip bone. Contains the iliac crest & iliac fossa
Ilium
The lower back part of the pelvic
Ischium
This is located in the middle of the pelvic. Has fibrocartilage disk in between
Pubic symphysis
Optimal angle is ~30 degrees
Lumbosacral angle
Can be in the sagittal plane (anterior/posterior tilt), frontal plane (lateral tilt), & transverse plane (rotation)
Pelvic girdle motions
Anterior superior iliac spine (ASIS) anterior to pubic symphysis?
Anterior tilt
Anterior superior iliac spine (ASIS) posterior to pubic symphysis?
Posterior tilit
Occurs when two iliac crests are not level?
Lateral tilt
What is the reference point during lateral tilt or walking?
The unsupported side
When someone raises leg for foot clearance during swing phase of gait?
Hip hiking
Occurs when one side moves forward or backwards in relation to the other?
Rotation
What happens during anterior pelvic tilt
Lumbar trunk extensors pull up posteriorly & hip flexors pull down anteriorly
What happens during posterior pelvic tilt
Abdominals pull up anteriorly & gluteus maximus and hamstrings pull down posteriorly
the most proximal joint of the lower extremity? is a ball and socket joint and is highly important to weight bearing?
hip joint