Figure 1.

Sensorimotor transformation and posterior parietal cortex (PPC). (A) Unlike movement to a static target (left) in which motor parameters are tightly linked to a fixed stimulus location, in flexible interception (right) the brain not only compensates for sensory latency to estimate current stimulus location S_t, but also predicts the future target location at reach offset S_t+MT to direct the intercepting movement. (B) The PPC might play a proactive role in predictive sensorimotor control by integrating visual (target location and motion), somatosensory and efference copy signal to form forward models of future object and body states.