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Our perceptions of the whole and of the parts of a visual stimulus are mediated by different brain regions. We used low-frequency transcranial magnetic stimulation (TMS) to show for the first time that opposite, homologous regions in the two hemispheres are involved in attending to local parts for left- and right-handed individuals. The brain regions that focus on the 'trees' while ignoring the 'forest' are switched as a function of handedness.

Original publication




Journal article


Nat Neurosci

Publication Date





276 - 277


Analysis of Variance, Attention, Brain, Brain Mapping, Dominance, Cerebral, Electric Stimulation, Female, Humans, Magnetics, Male, Middle Aged, Photic Stimulation, Reaction Time, Visual Fields