What occurs in the compensatory phase of feedforward control?

• A. Postural muscles activated again to stabilize body more
• B. Postural muscles activated in advance
• C. Movement halts
• D. Sensory input is used for planning

Answer: (A)

The main idea is that feedforward control can include a second, compensatory burst of muscle activity to tighten stability after the initial anticipatory activation. In the compensatory phase, postural muscles are reactivated to stabilize the body more as the movement unfolds and small disturbances appear. This reactivation helps refine balance by increasing stiffness and damping around the joints, keeping the person from swaying too much.

Activation in advance describes the initial anticipatory adjustments before movement, not this later reactivation. Movement halts and relying on sensory input for planning describe other aspects of control, not the corrective reengagement of postural muscles during the ongoing task.