Which term describes the posterior tilt of the pelvis during flexion?

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Multiple Choice

Which term describes the posterior tilt of the pelvis during flexion?

The movement described is about how the sacrum tilts relative to the pelvis at the sacroiliac joints. Nutation is the sacral base tilting forward (anterior tilt), whereas counternutation is the sacral base tilting backward (posterior tilt). When the pelvis flexes—such as bending forward or flexing the hip—the pelvis tends to tilt posteromedially, and the sacrum responds with a posterior tilt. This posterior tilt of the sacral base is counternutation. Dorsiflexion is an ankle motion, and general rotation isn’t the specific joint movement described here, so those terms don’t capture the posterior sacral tilt during flexion.

The movement described is about how the sacrum tilts relative to the pelvis at the sacroiliac joints. Nutation is the sacral base tilting forward (anterior tilt), whereas counternutation is the sacral base tilting backward (posterior tilt). When the pelvis flexes—such as bending forward or flexing the hip—the pelvis tends to tilt posteromedially, and the sacrum responds with a posterior tilt. This posterior tilt of the sacral base is counternutation. Dorsiflexion is an ankle motion, and general rotation isn’t the specific joint movement described here, so those terms don’t capture the posterior sacral tilt during flexion.

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