Hip structure and movement

Question 1

The hip (acetabular femoral, coxa femoral) joint is formed by the articulation between the

Answer 1

pelvic girdle and the femur

Question 2

Stability of the hip joint

Answer 2

The hip is a relatively stable joint.
* This is due to the hip joint bony architecture (joint congruency), strong
ligaments, and large supportive muscles.

Question 3

Function of the hip

Answer 3

Important roles in support and locomotion. The hip transmits force between the trunk and the lower extremity
The hips function in locomotion is enhanced by the hip’s wide range of motion

Question 4

3 bones of the pelvic girdle

Answer 4

Ilium, ischium, pubis

Question 5

Where is the greater sciatic notch

Answer 5

The large notch inferior to the PIIS

Question 6

Spine of the ischium

Answer 6

A bony projection inferior to the greater sciatic notch and superior to the lesser
sciatic notch

Question 7

Lesser sciatic notch

Answer 7

A notch in the ischium located inferiorly with respect to the spine of the ischium

Question 8

Where is the ischial tuberosity

Answer 8

The large bony prominence formed by the distal portion of the ischium

Question 9

What is the pubic ramus

Answer 9

The branch of the pubic bone that fuses with the ilium

Question 10

What is the inferior ramus

Answer 10

The branch of the pubic bone that fuses with the ischium

Question 11

What kind of bone is the sacrum and what is the sacrum

Answer 11

An irregular
A triangular shaped bone formed by the fusion of 5 sacral vertebrae that sits
between the two innominate bones

Question 12

What is the acetabulum

Answer 12

A deep socket formed at the lateral aspect of the innominate by the fusion of the ilium, ischium and pubic bones

Question 13

Obturator foramen

Answer 13

The large foramen inferior to the acetabulum formed by the ischium and pubic bones

Question 14

What is the linea aspera

Answer 14

The long ridge along the posterior surface of the diaphysis

Question 15

What is the pubic symphysis

Answer 15

The articulation between the pubic bone of each innominate
There is a fibrocartilaginous disc (interpubic disc) between the articulating pubic bones

Question 16

Sacroiliac joint articulating bones

Answer 16

Sacrum and ilium bones

Question 17

Articulating bones of the acetabular femoral (hip) joint

Answer 17

Acetabulum of the innominate (pelvic) bone and the head of the femur

Question 18

What does the acetabular labrum do?

Answer 18

It widens and deepens the acetabulum to improve joint congruency, and provides some shock absorption

Question 19

Is the hip or shoulder joint more stable?

Answer 19

Due to the deeper acetabulum, stronger joint capsule and ligaments, and presence of stronger muscles, the hip joint is stronger

Question 20

Function of the iliofemoral ligament

Answer 20

Limits excessive hip external rotation and hip extension

Question 21

Function of the pubofemoral joint

Answer 21

Limits excessive hip abduction and external rotation during hip extension

Question 22

Function of ischiofemoral joint

Answer 22

Limits excessive hip internal rotation

Question 23

What does the ligamenrum teres do

Answer 23

It is a small auxillary joint which provides a conduit for small vessels and innervations to the femoral head and plays a critical role in proprioception