Bony Pelvis and Pelvic Wall Flashcards
What are the components of the bony pelvis?
Sacrum
Coccyx
Right and Left os coxae
What is a hip bone made of?
Illium, ischium, pubis
Where is the pelvis major located?
Located about the pelvic brim
Where is the pelvis minor located?
Located inferior to pelvic brim
What creates the pelvic brim (pelvic inlet)?
S1 promontory
margin of ala
Arcuate line
pecten pubis
pubic crest
What creates the boundary between the arcuate line and the margin of ala?
Sacroilliac joint
Why is the illiolumbar ligament important?
It stabilizes L5 and prevents it from slipping forward
What bone bears the weight of your body as you are sitting?
Ischial tuberosity
What are the components of the lateral pelvic wall?
- Part of the hip bone below the pelvic inlet
- Obturator internus and its covering fasci and the obturator fascia
- Sacrotuberous ligament
- Sacropspinous ligament
Where does the illiococcygeus muscle insert into?
The tendinous arch of the obturator internus muscle
What ligament separates the greater and lesser sciatic foramen?
Sacropspinous ligament
What two muscles make up the levator ani?
Iliococcygeus m.
pubococcygeus m.
What makes up the pelvic diaphragm?
Coccygeus
Iliococcygeus
Pubococcygeus
What muscle passes through the lesser sciatic foramen and attaches to the greater trochanter?
Obturator internus m.
What muscle exits the greater sciatic foramen and attaches to the greater trochanter?
Piriformis m.
What muscle can be seen on the inferior portion of the pelvic floor and relaxes in order to straighten the angle of the anus to cause defication?
Puborectalis m.
What are the three layers of pelvic fascia?
- diaphragmatic fascia
- visceral fascia
- parietal fascia
What are the three types of urinary incontinence?
Overflow-urethral blockage
Stress-relaxed pelvic floor, increased abdominal pressure
Urge-bladder oversensitivity from infection, neurological disorders
How does the prostate gland affect after male urinary incontinence?
Stress-increased abdominal pressure after prostate gland removed
urge-overactive bladder
overflow-blocked urethra from an enlarged BPH
How does childbirth affect the pelvic floor?
Pubococcygeus can tear
can lead to urinary incontince due to weakening of the pelvic floor muscles
