The previous page is sending you to https://www.semanticscholar.org/paper/Ictal-Headache-and-Visual-Sensitivity-Piccioli-Parisi/2dc5d99308f1e5b2d7b3a7f9b7bc3e2adda74d94/figure/2.

 If you do not want to visit that page, you can return to the previous page.