Counternutation is the return to the neutral start position from a nutated position as well as a posterior motion of the sacral promontory. Bilateral sacral nutation and counternutation movements occur around a coronal axis within the interosseous ligament. Unilateral sacral nutation takes place when ...
Bilateral sacral nutation and counternutation movements occur around a coronal axis within the interosseous ligament. Unilateral sacral nutation takes place when the lower extremity is extended. There is also a constant degree of alternating (muscularly) ‘braced’ nutation in the standing position (Dor...