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Flashcards in Joints of the hip complex Deck (40)
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1

Is all of the acetabulum articular?

No

Lunate surface is weight bearing

Acetabular notch and fossa are non-articular

2

Describe the shape of the epiphysis in the acetabulum until puberty?

Y shaped 

 

3

What crosses the actebular notch?

Ligament 

 

4

What fills in the space in the acetabulum?

Potential space filled with fat pad

5

Describe the location of the fat pads within the hip joint?

Intra-articular

Extra-synovial

6

What is the anatomical neck of the femur?

Line of growth plate

 

7

Where is the fovea in the femur?

Head

 

8

Where can traction epiphyses occur in the femur?

Greater and lesser trochanters

9

Where is the intertrochanteric line/crest?

What is its significance?

Between greater and lesser trochanter

Line is anterior, crest is posterior 

Ligament attaches here

 

10

Where do blood vessels that supply the head of the femur enter the bone?

Enter growth plate just below anatomical neck

11

What is the significance of pressure and traction epiphyses in the femur?

Pressure epiphyses are weight bearing

Traction epiphyses can form where ligaments or muscles attach

12

Describe the orientation of the head of the femur?

What is the significance of this for the joint?

Directed upwards, medially and forwards 

So, anterior part of head lies outside socket 

13

How is the anterior part of the head of femur that lies outside the acetabulum protected?

Psoas bursa 

 

14

What is the function of the psoas bursa?

Protects head of femur that lies outside acetabulum and tendon 

 

15

What in the acetabulum does the head of the femur articulate with?

Why?

Roof of acetabulum 

Thickest cartilage here

 

16

List the intra-articular structures in the hip joint?

Describe the function of each?

Labrum: deepens cup and increases SA

Ligament of head of femur: directs artery to femoral head

 

17

Describe the bony architecture of the femur?

Two trabecular systems that intersect: superior (vertical and arcuate) and inferior (medial and lateral)

 

18

Compare the functions of the vertical and arcuate bundles in the bony structure of the femur?

Arcuate bundle: resist bending forces on neck of femur

Vertical bundle: for weight bearing in stance 

19

Where is the site of weakness in the bony architecture of the femur?

Why?

Arcuate bundles

Degenerate with ageing 

 

20

Where does the line of gravity lie in relation to the hip joint?

Behind centre of joint

 

21

Describe the position of greatest stability in the hip joint?

Why?

Extension

Abduction

Medial rotation

This is the close packed position where the ligaments are most taught

22

Describe the ligamentous supports of the hip joint?

Iliofemoral ligament (strong, anterior)

Ischiofemoral ligament, Pubofemoral ligament (weaker, posterior) 

 

23

Describe the attachment of the ligaments of the hip joints?

Iliofemoral: ileum to femur (2 attachments)

Ischiofemoral: from ischeum, blends with capsule (no attachment to femur)

Pubofemoral: from pubis, blends with capsule (no attachment to femur)

 

24

Describe the shape and function of the iliofemoral ligament?

Inverted V shape 

Tighten and spiral medially when joint is in extension 

Resist extension, prevent us from falling backwards 

 

25

What are the retinacular fibres in the hip joint?

What is their function?

Reflections of fibrous tissue from capsule to femoral neck

Contain vessels which supply head of femur 

26

Describe the movements that occur at the hip joint?

Flexion/extension

Abduction/adduction

Medial/lateral rotation

 

 

27

Describe the rotation that occurs at the hip joint during locomotion?

Medial rotation in stance

Lateral rotation in swing

28

Which muscles stabilise the head of femur in the acetabulum?

Cuff of fixator muscles 

Dynamic support

 

29

Describe the actions of gluteus medius and minimus?

Maintain position of pelvis in coronal plane (stop pelvis from falling to unsupported side)

Abduct hip

 

30

Describe the effect of injury to the gluteus medius and minimus?

Trendellenberg gait