Which sequence describes processing in anticipatory postural control?

• A. Sensory input -> conscious > nonconscious processing -> planned motor output
• B. Sensory input -> conscious processing -> nonconscious processing -> planned motor output
• C. Conscious processing -> sensory input -> planned motor output
• D. Nonconscious processing -> sensory input -> planned motor output

Answer: (B)

Anticipatory postural control uses a flow from sensing to planning to automatic refinement before action. First, sensory input from vision, vestibular, and somatosensory systems provides information about body position and the upcoming task or perturbation. Next, conscious processing interprets that information and the goal of the movement, helping to form a provisional plan for how to respond. Then nonconscious processing quickly and automatically translates that plan into automatic adjustments using learned motor programs and internal models, preparing the body in advance. Finally, the planned motor output is prepared for execution, resulting in coordinated postural and limb activation that stabilizes posture during the movement.