Perceiving what is reachable depends on motor representations: evidence from a transcranial magnetic stimulation study.

Even though the trajectory amplitude seems slightly shorter when stimulating the motor cortex (11.73cm) than when stimulating either the premotor cortex (12.27cm) or the control site (11.88cm), with concomitant shorter peak velocity (610mm/s, 652mm/s and 640mm/s respectively) and acceleration (8576mm/s 2 , 9485mm/s 2 and 9649mm/s 2 respectively), these variations did not reach statistical significance (peak velocity: F(2,12) = 0.92, p = 0.39; peak acceleration: F(2,12) = 0.01, p = 0.97; peak deceleration: F(2,12) = 0.07, p = 0.84) or the SOA (peak velocity: F(2,12) = 0.18, p = 0.76; peak acceleration: F(2,12) = 0.96, p = 0.32; peak deceleration: F(2,12) = 2.27, p = 0.10).

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