Mean values of percentage error amplitude (PEA) with standard error.

(A) for saccades to left, saccades to right, divergence and convergence, (B) for combined convergent movements and (C) for combined divergent movements under the three experimental conditions: no-TMS, TMS over the right, or the left FEF. Asterisks indicate significant increases of PEA after TMS over the left or the right FEF relative to no-TMS.