Bony Pelvis and Hip Joint

Question 1

What bones form the bony pelvis

Answer 1

os coxae (2)
sacrum
coccyx

Question 2

Bones of the os coxa
what connects them?
which one weight bears while sitting

Answer 2

ilium, ischium, pubis

ischium bears weight while sitting

connected by hyaline cartilage that fuses during growth and development

Question 3

Identify the following on the ox coxae
* ilium
* iliac crest
* posterior superior iliac spine
* posterior inferior iliac spine
* anterior superior iliac spine
* anterior inferior iliac spine
* iliac fossa
* acetabulum
* acetabular notch
* greater sciatic notch
* ischial tuberosity
* body of ischium
* obturator foramen
* body of pubis
* arcuate line
* iliopubic eminence
* pubic tubercle
* superior ramus of pubis
* inferior ramus of pubis
* pubic symphysis

Question 4

What are the 2 openings in the pelvic floor

Answer 4

• urogenital hiatus
• rectal hiatus

Question 5

What are the two portions of the pelvis called and their functions

Answer 5

• greater pelvis: supports abdominal viscera
• lesser pelvis: inferior and houses all pelvic viscera including pelvic inlet

Question 6

What are the borders the pelvic inlet

Answer 6

posterior: sacral wings and sacral promontory

laterally: arcuate line of ilium and pectineal line of pubis

anteriorly: pubic symphysis

Question 7

How are the os coxae connected anteriorly and posteriorly?

Answer 7

anteriorly: pubic symphysis
posteriorly: sacrum

Question 8

What covers the obturator foramen

Answer 8

obturator membrane with small opening known as the obturator canal for the passage of the obturator artery vein and nerve

Question 9

what forms the acetabulum

Answer 9

all 3 bones of os coxa

Question 10

hip joint
* joint type
* what forms it

Answer 10

ball and socket

head of femur covered in articular cartilage + lunate surface of the acetabulum

Question 11

List and describe the ligaments that stabilize the hip joint

Answer 11

one intracapsular ligament: holds a blood vessel. lateral end is narrow and attaches to foveal ligament. medial end is wider and starts at acetabular notch and transverse acetabular ligament

3 extracapsular ligaments:
- iliofemoral ligament; stabilizes the anterior and superior aspects of the joint. has a y shape. attaches to ASIS and acetabular labrum on the proximal end and the intertrochanteric line of femur; prevents hyperextension of hip joint during standing

• pubofemoral ligament: stabilizes anterior and inferior aspects of the joint;triangular shaped. attaches from obturator crest to intertrochnateric line. prevents overextension and overadduction of the hip
• ischiofemoral ligament: ischial part of acetabulum and greater trochanter. prevents hyperextension of the hip joint

Question 12

What type of dislocation is most likely for the hip and why

Answer 12

posterior dislocation as the posterior aspect only has the ischiofemoral ligament preventing dislocation (although it also has many muscles to reinforce that ligament