Contralateral neglect induced by right posterior parietal rTMS in healthy subjects

&NA; We applied repetitive transcranial magnetic stimulation (rTMS) in order to induce interference on visuo‐spatial perception in 11 healthy subjects. Subjects performed a visuo‐spatial task requiring judgements about the symmetry of prebisected lines. Visual stimuli consisted of symmetrically or asymmetrically transected lines, tachystoscopically presented for 50 ms on a computer‐monitor. Performance was examined in basal condition and during rTMS trains of 10 stimuli at 25 Hz, delivered through a focal coil over right or left posterior parietal cortex (P5 and P6 sites) and triggered synchronously with visual stimulus. Randomly intermixed sham rTMS trains were employed to control for non‐specific effects. Right parietal rTMS induced a significant rightward bias in symmetry judgements as compared with basal and sham rTMS conditions. No differences emerged between other conditions.