3 ms·
It's not a retinal phenomenon, it's a cortical spreading depression passing over your visual cortex. The fact that the aura moves through visual space in a regu
by zachmu 3y ago
It's not a retinal phenomenon, it's a cortical spreading depression passing over your visual cortex. The fact that the aura moves through visual space in a regular fashion in one piece implies that the neurons in the visual cortex are spatially arranged in way that maps more or less 1:1 with the visual field. Which I guess isn't that surprising when I think about it, but doesn't seem inevitable.
- blincoln 3y agoSorry if I was unclear. I wasn't trying to imply that it did or didn't directly involve the retina, just that it seemed suspiciously related to the arrangement of receptors on the retina, and I was curious why. If you had a spreading pattern of bad data in VRAM, it's unlikely that the physical arrangement of the bits would map well to the current screen resolution and give a circle or box shape on screen, for example.
- zachmu 3y agoYou don't have to apologize :)