Lesson
Hip Joint - continued
- Nutation
- Sacral flexion (anterior rotation of the sacrum in relation to the ilium)
- The base of the sacrum *on the superior end) moves anteriorly and inferiorly
- Occurs WITH trunk flexion or hip extension
- Counternutation
- Sacral extension (posterior rotation of the sacrum in relation to the ilium)
- The base of the sacrum moves posteriorly and superiorly
- Occurs WITH trunk extension or hip flexion
Lippert, p249