Pelvis and Sacrum Flashcards
What moves first in the body in most actions? Why does it move first?
Pelvic floor; provides anticipatory stability
On the sacrum, the large _______ surface articulates with the ilium, forming the SI joint
Auricular
The base of the sacrum is the _____ portion of the sacrum
Superior
The apex of the sacrum is the ______ portion of the sacrum
Inferior
This consists of layers of muscles crossing every which way to create a lot of support
Pelvic floor
Small triangular bone of four fused vertebrae
Coccyx
Where the base of the coccyx and the apex of the sacrum articulate; fibrocartilaginous disc in between; held together by several small ligaments; usually fuses late in life
Sacrococcygeal joint
Top of the true pelvis; viewed superiorly
Pelvic inlet
bottom of true pelvis; viewed inferiorly
Pelvic outlet
Incorrect contraction of the pelvic floor can lead to ____
Incontinence
What can happen if proper support is not provided by the pelvic floor for areas of vulnerability (rectum, vagina, and urethra)?
Things can get pushed through because of the force produced by the body (abdominal area)
Hip flexion and increased lumbar lordosis occurs with a(n) _____ tilt of the pelvis
Anterior
Hip extension and lumbar kyphosis occurs with a(n) _____ tilt of the pelvis
Posterior
Open chain flexion of the hip should be happening in normal abdominal activation; pelvic would be ______ tilting
Posteriorly
________ tilt of the pelvis occurs when abdominal muscles are not strong enough to provide stability
Anterior
In the frontal plane, lumbar (convexity/concavity) on the side of the abducting hip
Convexity
In the frontal plane, lumbar (convexity/concavity) on the side of the adducting hip
Concavity
Ipsi-directional lumbopelvic rhythm
When someone is reaching down
Contra-directional lumbopelvic rhythm
When someone reaches up
“Nod” forward; sacrum goes into anterior tilt while iliac goes into posterior tilt; close packed position
Nutation
Sacrum goes into posterior tilt, while iliac goes into anterior tilt; open packed position
Counternutation
Sacrum (nutation/counternutation) occurs with lumbar extension and exhalation
Nutation
Sacrum (nutation/counternutation) occurs with lumbar flexion and inhalation
Counternutation
Pelvis shifts superiorly on right side, sacrotuberous ligament on right side gets slack, and the sacrotuberous ligament on the left side gets tight
Upslip
2 muscles fuse distal to the inguinal ligament and attach as a single tendon to the lesser trochanter of the femur
Iliopsoas
