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Hugh's MD1 Musculo-Skeletal > Hip Joint > Flashcards

Flashcards in Hip Joint Deck (40)
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1

Which bones make up the "hip bone"?

The pubis

Ileum

Ischium

2

What is the lunate surface of the acetabulum?

A crescent shaped area of the joint around 2/3 of the perimeter of the joint

3

What is the name of the notch that complete of the perimeter of the acetabulum?

Acetabular notch

4

What is covers the acetabular notch?

Ligament

5

T/F The acetabular fossa isn't an articular surface

True

6

T/F the fat-pad of the acetabular joint is intra-synovial

False, it's only intra-articular

7

Which aspect of the femur is the greater trochanter located?

Lateral

8

What type of epiphyses are present at the greater and lesser trochanters?

Traction trochanters - grow is stimulated by pulling of the muscles

9

What is the fovea for?

Attachment of the ligament 

10

What is present in the neck of the femur?

Small holes for the entry of vessels

11

In what orientation is the head of the femur?

Medially

Superiorly

Anteriorly

12

What are the implications of the anterior orientation of the femur?

A small part sticks out of the capsule - protected by the psoas bursa

13

Which aspect of the acetabulum does the femur articulate with?

The roof - where the cartilage is thickest

14

What is weaver's bottom?

Bursitis due to irritation of the ischial tuberosity

15

Apart from the psoas bursa where else do can you find bursa?

Over the greater trochanter

16

What is the function of the labrum of the hip joint?

Increase the SA for articulation

17

What is the function of the ligament of the head of the femur?

Direct the development of the obturature artery

18

Why does the neck of the femur become susceptible to breaking with age?

Loss of the trabeculae 

19

What are the inferior (medial and lateral) trabeculae for?

Muscles pulling on the greater and lesser trochanter

20

Where does the centre of gravity sit in relation to the hip joint?

Behind it

21

Where does the centre of gravity sit in relation to the knee joint?

Slightly in front

22

What are the implications of the position of the centre of gravity in relation to the ankle joint?

It's a fair way forward therefore you need contraction of the soleus to remain upright

23

What is the position of the greatest stability of the hip joint?

Extension

Medial rotation

Slight abduction

24

What is the position of least stability of the hip joint?

Flexion

Lateral rotation

Adduction

25

What ligament of the hip joint is most important?

Iliofemoral lig

26

What movement does the iliofemoral ligament resist?

Extension

27

What are the three ligaments of the hip joint?

Iliofemoral

Pubofemoral

Ischiofemoral

28

What is the zona orbicularis?

Ring of fibres that line the internal aspect of the ligaments of the hip

29

What are the retinacular fibres?

Extension of the capsule down the neck of the femur

30

What are the retinacular fibres important for?

Blood supply of the neck

31

When does the gluteus maximus work for extension?

When high power is required - eg sprinting

32

What is the function of the 6 muscles that lie beneath the gluteus maximus?

Support the joint - pull the head into the socket

External rotation

33

A Trendellenberg gait is due to damage to which muscles?

Gluteus medius and minimus

34

What is the function of the gluteus medius and minimus?

Abduction

Hold the pelvis level when leg is raised during walking  - dysfunction = Trendellenberg gait

35

What are the three nerves of the hip joint and where do they lie?

Sciatic - behind

Obturator - Medial

Femoral - In front

36

Where can hip pain be referred to?

The inner thigh

37

What are the major blood suppliers of the hip joint?

The medial and lateral circumflex arterise

38

What is endangered in a hip dislocation?

Sciatic nerve

39

How do you treat congenital dislocation of the hip joint in babies?

Brace the legs in abduction to position the head in the socket

40

How does a fructured head of the femur appear acutely?

Shortened and medially rotated (due to muscle spasm)