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Abandoned HypothesisOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry

Where Are the fMRI Correlates of Phosphene Perception?

Tom A. de Graaf, Tom A. de Graaf, Job van den Hurk et al. · 2018 · Frontiers in Neuroscience

Pulses of transcranial magnetic stimulation (TMS) over occipital cortex can induce transient visual percepts called phosphenes. Phosphenes are an interesting stimulus for the study of the human visual system, constituting conscious percepts without visual inputs, elicited by neural activation beyond retinal and subcortical processing stages in the visual hierarchy. The same TMS pulses, applied at threshold intensity phosphene threshold (PT), will prompt phosphene reports on half of all trials (“P-yes”) but not on the other half (“P-no”). Contrasting brain activity (P-yes > P-no) can provide un

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