If a person stands and bends forward while attempting to touch his or her toes (keeping knees extended), this produces ____________________ at the innominates, ____________________ at the sacrum and flexion of the lumbar spine
a. posterior rotation, nutation
b. anterior rotation, counternutation
c. posterior rotation, counternutation
d. anterior rotation, nutation
ANS: D
Forward flexion caused an anterior rotation of the pelvis accompanied by nutation of the sacrum.
Nutation is the commonly used term for sacral motion when the sacral promontory moves
anteriorly and inferiorly while the coccyx moves posteriorly in relation to the ilium.
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