Please see the discussion on Requests for cleanup for more information and remove this template after the problem has been dealt with. 1  Afep pigeon (Columba unicincta) 2  African owl pigeon (Columba livia domestica) 3  African green pigeon (Treron calvus) 4  African olive pigeon (Columba arquatrix) 5  American pigeon (Patagioenas)
Fatal familial insomnia and sporadic fatal insomnia differ from other prion diseases because they affect predominantly one area of the brain, the thalamus, which influences sleep. The familial and sporadic forms typically begin between the ages of 30 and 50 years.
Fatal Familial Insomnia (FFI) is a rare sleep disorder. It's genetic, and has been diagnosed in less than 40 families worldwide. Perhaps the most famous case is that of the Chicago music teacher, Michael Corke, who featured in the BBC documentary The Man Who Never Slept. FFI is a truly dark disease.