Week 4 - The Hip Flashcards
what are the key characteristics of the hip joint ?
- ball and socket joint
- stable joint
- large loads
what is a key difference between the glenohumeral joint and the hip joint ?
glenohumeral has more mobility and less stability and vice versa
describe osteoarthritis (OA)
the breakdown of the articular cartilage and bone in a joint
what provides the hip with its stability ?
- bony fit
- labrum
- strong ligaments
- muscles are less important
define labrum
flat rim of fibrocartilage attached by its circumference to the margin of the acetabulum
what are the key facts of a labral tear ?
- 22% athletes have groin pain
- 75% of tears have no direct cause
what are the 2 types of impingement ?
cam = femoral head not spherical
pincer = extra bone on acetabular rim
what are the 5 key ligaments ?
- transverse acetabular ligament
- ligamentum teres
- illofemoral
- pubofemoral
- ishiofemoral
how does the transverse acetabular ligament aid stability ?
prevents inferior displacement
how does the ligamentum teres aid stability ?
connects the head of the femur to the acetabulum, helping to reinforce the joint from within
how does the illofemoral ligament aid stability ?
supports the hip in standing and resists: extension, internal and external rotation
how does the pubofemoral ligament aid stability ?
resists abduction, extension, and external rotation
how does the ishiofemoral ligament aid stability ?
resists adduction and internal rotation
what are the movements of the hip ?
- flexion (130)
- extension (30)
- abduction (35)
- adduction (30)
- lateral rotation (50)
- medial rotation (45)
- circumduction
what are the anterior muscles of the hip ?
- iliopsoas
- pectineus
- rectus femoris
- sartorius
