The Understanding Migraines chart examines the causes and symptoms of these headaches, as well as treatment options. The brain is shown through several images, including a large overall view and a close-up view of the meninges. Images of an arteriole, vasoconstriction and vasodilation help to explain the process. Heavy gauge 3ml lamination with sealed edges and two metal eyelets for hanging makes chart highly durable. Write-on/wipe-off with dry erase marker (not included).