3.1 - Hip Joint Flashcards Preview

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Flashcards in 3.1 - Hip Joint Deck (14):
1

What 3 bones fuse to form the hipbone?

Ilium
Ischium
Pubis

Begin to fuse 15-17 years, complete by 20-25.

2

What’s the acetabulum?

Socket of joint
Where hip bones converge
Margin of acetabulum is complete inferior

3

What is the acetabular labrum?

Fibrocartilogenous rim attached to margin of acetabulum
Increases articular contact area
Transverse acetabular ligament strengthens inferior portion of acetabulum (where the notch is)

4

What is the joint capsule of the hip bone?

A capsule of fibres that take a spiral course
Attach at the intertrochanteric line anteriory
Lateral part of the neck is extra capsular posteriorly

5

What ligaments strengthen the joint capsule?

Iliofemoral
- anterior
- Y shaped
- bodies strongest ligament
- prevents hyperextension

Pubofemoral
- anterior
- prevents over abduction

Ischiofemoral
- weakest of all three
- limits extension
- posterior

6

What are the hip flexors?

Iliopsoas (illiacus and psoas major, two muscles, common insertion)
Rectus femoris
Sartorious

SIR

They all cross the hip joint

7

What are the hip adductors?

Adductors
- Magnus
- brevis
- longus

Pectineus
Gracious
Obturator externus

8

What are the hip extensions?

Gluteus maximums
Long head of biceps femoris
Semimembranosus
Semitendinosus

Located posteriorly

9

What are the hip abductors?

Gluteus medium
Gluteus minimums
Tensor fasciae latae

10

What are the lateral rotators?

Piriformis
Superior gemellus
Obtrurator internus
Inferior gemellus
Quadratus femoris

11

What’s the nerve supply?

Femoral nerve - anterior
Obtruator nerve - inferior
Superior gluteal nerve = superior
Nerve to quadratus femoris = posterior

12

What are the sources of blood supply?

Major = deep femoral artery
- medial circumflex femoral access for neck
- lateral circumflex femoral artery has to pierce more fibrous cartilage to excess

In adults, also have obturator artery via ligament of head of femur

13

What is the issue with blood supply to the head of the femur?

Blood supply from ligament is often not adequate if only supply

If you get a femoral neck injury you can tear retinacula arteries
Result can be Avascular necrosis of femoral head

14

What is the effect of superior gluteal nerve damage?

- supplies hip abduction
- damage to SGN leads to weakened abduction and changes to stance phase of gait cycle = trendelenbergs sign (pelvis droops on the unaffected side - sign is contralateral)