Abstract
Publisher Summary This chapter summarizes results derived from the use of transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS) on visual perception and compares characteristics of the two methods. One major aim of vision research is to find methods that are suitable to induce functional changes in the human brain in a controlled, safe way to explore visual perceptual and visuo–cognitive functions. TMS and tDCS allow a manipulation of cortical network activity in humans and in parallel, a psychophysical evaluation of correlated perceptual changes. They influence the brain's activity electrically and change the organized cortical activity transiently and reversibly in a non-invasive, nonpainful way. However, in the mode of action, both techniques are at least partly complementary. TMS is an essential tool in studying the effects of abnormal reorganization of the visual cortex or for examining visual learning effects. TMS and tDCS may elucidate or even modulate plastic changes in the nervous system to influence behavior.
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