Pelvis and Perineum
Terms
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- Pelvis ring of bone consists of
- 2 hip bones, sacrum, coccyx
- Coxal bone consists of
- ilium, ischium, pubis
- What divides pelvis into greater (false) and lesser (true)
- pelvic brim
- What forms floor of pelvis
- coccygeus + levator ani
- Which two parts of pelvis are on the same vertical plane
- ASIS + pubic tubercle
- Bones of pelvis males vs females
- Females are smaller and lighter, thinner then males
- Compare pelvic inlet in males vs females
-
Inlet is oval in females
Heart shaped in males - Compare outlet in males vs females
- Outlet is larger in female then in male because of everted ischial tuberosities in female
- Compare subpubic angles in males vs females
- Larger and wider in females
- Compare male vs female sacrum
- Female sacrum is shorter and wider
- Compare obturator foramen in males vs females
- Oval and triangular in female and round in male
- Iliac fossa contains
- iliacus muscle
- Acetabulum is an attachment for
- head of femur
- Pubic tubercle is an attachment for
- inguinal ligament
- 4 pelvic shapes
-
Android --> heart shaped
Anthropoid --> heart shaped also but pushed to lateral sides
Gynocoid
Platypelloid - Which pelvic shapes are male
- Android + anthropoid
- Which pelvic shapes are female
- Gynocoid + platypelloid
- Describe conjugate diameter
-
Anatomic conjugate --> rue conjugate, from superior pubic symphysis to sacral prominence
Obstetrical conjugate --> narrowest region, from back of pubic symphysis to sacral prominence, shows if babys head will pass
diagonal conjugate - only one that can be measured via vagina, from inferior pubic symphysis to sacral prominence - Describe oblique diameter
- SI joint to iliopubic eminence
- Transverse diameter
-
from lateral to lateral
-pelvic inlet - from arcuate to arcuate line
-pelvic outlet - from ischial to ischial tuberosity - AP diameter of outlet
- inferior pubic symphysis to coccyx
- Lumbosacral joint
-
between L5 ans sacrum
1. Secondary cartilaginous - IV disc, iliolumbar ligament
2. 2 zygapophyseal joints - Sacroiliac joint
-
little movement
compound joint - plain synovial + syndesmosis
-sacrotuberous + sacrospinous ligaments - Sacrococcygeal joint
- cartilaginous joint
- Pubic symphysis
- secondary cartilaginous - superior and inferior pubic ligaments