What is a "photosensitivity" seizure trigger?

What is a "photosensitivity" seizure trigger?

Charles Ribak, Ph.D. (Professor of Anatomy and Neurobiology, UC Irvine School of Medicine) gives expert video advice on: What is a "photosensitivity" seizure trigger?; What is an "automatism"? and more...

With epilepsy, a photosensitivity seizure trigger involves a type of seizure whereby bright light stimulates that person who has epilepsy to have a seizure. Now, photosensitivity refers to the fact that it is a photo induced seizure. Usually, a strobe light is used in this case to provoke the seizure and the circuitry involved would be the retina of the eye, the lateral geniculate of the thalamus, and the visual cortex which is found in the occipital cortex.