Epilepsy 
Epilepsy is a neurological (related to the nervous system) condition in which the brain experiences brief electrical disturbances, which can lead to seizures.

Huntington’s Disease 
Huntington’s disease is a rare, progressive, neurodegenerative genetic disorder, in which people may experience behavioral disturbances, mental deterioration and uncontrolled movements.

Porphyria
Porphyrias are a group of rare disorders caused by deficient enzymes needed to create a part of hemoglobin, called heme. Because of this deficiency, people with porphyria accumulate certain chemicals, called porphyrins.