Sentences with phrase «visual phosphene»

Increased application of rTMS corresponded with a reduction in intensity of visual phosphene hallucinations and was reflected in altered blood oxygen level - dependent signal; fMRI revealed focal excitatory discharges at the border of the lesion, highlighting the origin of phosphenes.

This study provided Class IV evidence in a single - case report that multi-day rTMS reduced intra-hemispheric and inter-hemispheric imbalance and associated visual phosphene hallucinations following occipital stroke.

Rafique and colleagues (2016) examined the effectiveness of multi-day rTMS to the occipital cortex in a patient with continuous visual phosphene hallucinations for more than 2 years following occipital stroke.

The authors concluded that this case was rare in its presentation of chronic continuous visual phosphene hallucinations following occipital stroke.

Not exact matches

At the same time, transcranial magnetic stimulation was used to excite the brain's visual cortex, priming the volunteers to see illusory spots of light called phosphenes.

The subjects had to navigate 21 different mazes, with two choices to move forward or down based on whether they sensed a visual stimulation artifact called a phosphene, which are perceived as blobs or bars of light.

Artificial retinas, light - sensitive chips that mimic the eye's signal - processing ability and stimulate the optical nerve or visual cortex, have been tested in a handful of blind subjects who usually «see» nothing more than phosphenes, or flashes of light.

But only a «yes» answer generates a response intense enough to stimulate the visual cortex and cause the inquirer to see a flash of light known as a «phosphene.»