Sacroiliac Joints Movements (Pelvis Movements)

Question 1

Pelvis mechanism

Answer 1

1. Sacrum long axis lies more horizontal than vertical
2. Sacroiliac movements are very limited because they support and transmit body weight from vertebral column to hip joint

Question 2

Sacrum upper end

Answer 2

1. Body weight tends to move downwards and forwards
2. It is prevented by interosseous ligament and posterior sacroiliac ligament

Question 3

Sacrum lower end

Answer 3

1. Body weight tends to move upwards and backwards
2. Prevented by Sacrotuberous and sacrospinous ligaments