Phase-locking activity between auditory and motor cortices time lock to stimulus onset. A, PLV plot for AV (left), A (middle), and V (right) conditions. B, Multisensory effects on PLV assessed using the additive model: AV versus (A + V). Color bars indicate PLV value (A) and difference in PLV value between AV and (A + V) (B). A, B, Solid contoured colors represent statistically significant values corrected for multiple comparisons.