Counter Nutation
Counter-nutation: posterior rotation of the sacrum relative to the ilium, and/or anterior rotation of the ilium relative to the sacrum. The pelvic floor muscles are examples of muscles that may counter-nutate the sacrum.
Counter Nutation
Counter-nutation is the posterior rotation of the sacrum relative to the ilium, and/or anterior rotation of the ilium relative to the sacrum. The pelvic floor muscles are examples of muscles that may counter-nutate the sacrum.