Transcranial electrical stimulation over visual cortex evokes phosphenes with a retinal origin.

Bart Krekelberg evokes phosphenes with a retinal origin Transcranial electrical stimulation over visual cortex

Transcranial electrical stimulation over visual cortex evokes 2 phosphenes with a retinal origin 3

36 37 Transcranial electrical stimulation (tES) is a promising therapeutic tool for a range of 38 neurological diseases. Understanding how the small currents used in tES spread across the scalp 39 and penetrate the brain will be important for the rational design of tES therapies. 40 41 Alternating currents applied transcranially above visual cortex induce the perception of flashes 42 of light (...

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Number: 949 Submitted By: Kohitij Kar Last Modified: December 1 2010 Retinal And Cortical Effects Of Transcranial Electric Stimulation Kohitij Kar, Bart Krekelberg Center for Molecular and Behavioral Neuroscience, Rutgers University Transcranial electric current stimulation (tES) of the human brain is assumed to affect cortical excitability by invoking subthreshold modulation of neuronal activi...

A novel approach for documenting phosphenes induced by transcranial magnetic stimulation.

Stimulation of the human visual cortex produces a transient perception of light, known as a phosphene. Phosphenes are induced by invasive electrical stimulation of the occipital cortex, but also by non-invasive Transcranial Magnetic Stimulation (TMS)(1) of the same cortical regions. The intensity at which a phosphene is induced (phosphene threshold) is a well established measure of visual corti...

Changes in visual cortex excitability in blind subjects as demonstrated by transcranial magnetic stimulation.

Any attempt to restore visual functions in blind subjects with pregeniculate lesions provokes the question of the extent to which deafferented visual cortex is still able to generate conscious visual experience. As a simple approach to assessing activation of the visual cortex, subjects can be asked to report conscious subjective light sensations (phosphenes) elicited by focal transcranial magn...