BONES OF THE PELVIC GIRDLE
Male/Female pelvis have 4 main differences:
1) Bones are thinner and lighter in a female -females weigh less (average) -bones are more flexible 2) Ischial spines are smaller in females -makes pelvic opening layer 3) Iliac crest flare more laterally in females -wider hips 4) Pubic arch is greater than 90 degrees in female - is the reason why females hips are wider
*Pelvic girdle divided into 2 regions:
1) False pelvis: 2) True pelvis:
BONES OF THE PELVIC GIRDLE 3)
1) Protection thick bones form protective enclosure for organs in the area 2) Supports the upper body thick bones can withstand the stress and gravity placed that area while standing
All 3 bones fuse together to form the acetebulum
description: deep socket heavily reinforced with ligaments received head of femur
a) Coxal bones (1 on each side of the pelvic girdle)
description: fused together to form the pelvic composed of three irregular bones
sacroiliac joint:
formed between ilium and sacrum allows bending at the waist
Pubis
location: most anterior portion of the coxal bones
Ischium
location: most inferior part of the pelvic girdle
Ilium
location: most superior part of coxal bone
obturator foramen
opening that allows blood vessels and nerves to pass through to anterior thigh
ischial tuberosity
roughened area where your weight rest when sitting
greater sciatic notch
rounded ridge of bone where sciatic nerve and blood vessel passes through to the posterior thigh
1) False pelvis:
superior to true pelvus spans from illiac crest to iliac crest
2) True pelvis:
surrounded by bones spans from pelvic brim to pelvic brim forms the actual opening in the pelvis needs to be large enough (in women) to fit a baby's head through, (carefully measured by dr)
iliac crest
thin ridge of bone on top of ilium landmark site for injection
ischial spine
tiny projections of the ischium narrows the outlet where baby's head passes through
pubic symphysis
where pubis bones fuse made of fibrocartilage forms the public arch