Pelvis 1 Part 1: Skeleton Flashcards
pelvic cavity
continuation of the abdominal cavity into the pelvis via pelvic inlet
perineum
inferior to the floor of the pelvic cavity
pelvic girdle
-articulates with axial skeleton
-supports lower limbs and visceral organs of the pelvis
os coxae
fusion of ilium ischium and pubic that articulate with each other at pubic symphysis and sacrum
ilium
-body, ala, iliac crest, anterior superior iliac spine, anterior inferior iliac spine, posterior superior iliac spine, posterior inferior iliac spine
anterior, posterior, and inferior gluteal lines
attach gluteal muscles
iliac fossa
houses iliacus
articular surface
articulates with the sacrum forming sacroiliac joint
arcuate line
superior boundary of true pelivs
Ischium
-Ischial body and ramus
-Ischial spine
-ischial tuberosity
-lesser sciatic notch
Ischial spine
attaches supraspinous ligament with sacrum
Ischial tuberosity
attaches sacrotuberous ligament with sacrum and hamstrings
sacrospinous ligament
-attaches sacrum with ischial spine
-converting greater sciatic notch into greater sciatic foramen and lesser sciatic notch into lesser sciatic foramen
Pubis
-body
-superior/inferior rami
-pubic symphysis
-pubic crest
-pubic tubercle
-pectineal line
pubic crest
rectus abdominis and external oblique muscle
pubic tubercle
attaches inguinal ligament
pectineal line
line along superior ramus
obturator foramen
almost completely closed by the obturator membrane aside from the obturator nerve and obturator artery that pass through
acetabulum
deep socket that limits the range of motion at the hip
pelvic brim
separate greater pelvis from lesser pelvis
greater pelvis
false pelvis, part of the abdominal cavity
lesser pelvis
true pelvis, part of the pelvic cavity
contents of pelvic brim
-superior margin of the pubic symphysis
-pectineal line
-arcuate line
-sacral promontory
delineation of the pelvic inlet
delineated by the pelvic brim, the superior opening of the lesser pelvis
-infant head enters as labor begins
