Cover FigureAlthough both the PRR and area 5d have been found to be intimately involved in visually guided reach, several recent studies of reference frame, decision making, and sequential movement suggest that they might play distinct roles in planning and control of reach at different levels of complexity, indicating a hierarchical circuitry participating in translation from abstract intention into concrete action plan.
Keywords: action selection; decision making; reference frame; sensorimotor integration; sequential movement.