The Pelvic Bones and Muscles

Question 1

pelvic brim extends from ____ anteriorly and ____ posteriorly

Answer 1

symphysis pubis
sacrum

Question 2

pelvis formed by (3)

Answer 2

sacrum, coccyx, hip bones

Question 3

hip bones AKA

Answer 3

innominate bones
os coxae

Question 4

what makes up the innominate bones

Answer 4

ileum
pubis
ischium

Question 5

sacral promontory

Answer 5

little prominence on anterior border of S1

Question 6

sacrum is composed of ____

Answer 6

5 fused vertebrae

Question 7

how does sacrum connect with os coxae

Answer 7

sacroiliac joints

Question 8

coccyx made up of ____

Answer 8

3-5 rudimentary vertebrae

Question 9

ilium (what/parts)

Answer 9

largest and most superior part of hip bones

Ala: large flaring wing
Fossa: inner aspect of ala
Crest: most sup portion

Question 10

pubis (what/parts)

Answer 10

part of hip bones
joins midline to form symphysis pubis

body and 2 rami

Question 11

ischium (what/function)

Answer 11

posterior and inferior part of hip bones
support while sitting

Question 12

pelvic muscles function

Answer 12

assist in the movement, stabilization, and protection of structures

Question 13

what are the two classifications of pelvic muscles

Answer 13

pelvic wall
pelvic diaphragm

Question 14

pelvic wall muscles

Answer 14

psoas
iliacus
iliopsoas
obturator
piriformis

Question 15

psoas (location, extends)

Answer 15

lat to vertebral bodies
extends from upper abdomen to pelvis

pelvic wall

Question 16

iliacus (shape, extends, joins)

Answer 16

triangular
extends from iliac crest and sacrum
joins with psoas

pelvic wall

Question 17

iliopsoas (location, inserts, function)

Answer 17

anterior over pelvic brim
inserts into femur
helps flex the thigh
(formed by junction of psoas/iliacus)

pelvic wall

Question 18

obturator (parts, forms, function)

Answer 18

internal and external parts
(obturator internus forms the side walls of the pelvis)
aids in the lateral rotation of the thigh

pelvic wall

Question 19

piriformis (shape, forms, function)

Answer 19

triangular
forms a large part of the posterolateral wall of pelvic cavity
responsible for lateral rotation and abduction

pelvic wall

Question 20

pelvic diaphragm muscles

Answer 20

Levator Ani Muscles
Coccygues

Question 21

levator ani muscles (size, consists of, fucntion)

Answer 21

largest/most important
pubococcygeus/iliococcygeus
integrity of the pelvic floor depends on the function of these muscles

pelvic diaphragm

Question 22

coccygeus (size, forms)

Answer 22

smaller than levator ani
forms the posterior aspect of the pelvic floor

pelvic diaphragm