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The Effects Of Alpha Oscillations On Touch Perception And Visuo-Tactile Integration, Lei Ai

Dissertations, Theses, and Capstone Projects

Previous studies have shown that touch perception and visuo-tactile integration have large inter-subject/intra-subject variations. For example, touch perception varies across trials and the temporal binding windows of visuo-tactile integration varies across subjects. I hypothesized that the variations might be due to the change of power, phase and peak frequency of brain alpha oscillations. In the first set of experiments, I examined whether the power and phase of alpha oscillations predict successful conscious touch perception. Near-threshold tactile stimuli were applied to the left hand while electroencephalographic (EEG) activity and fast signal optical imaging were recorded over the somatosensory cortex. Alpha power …