Insomnia is a variant of Tourette's--the waking brain races, sampling the world after the world has turned away, touching it everywhere, refusing to settle, to join the collective nod. The insomniac brain is a sort of conspiracy theorist as well, believing too much in its own paranoiac importance--as though if it were to blink, then doze, the world might be overrun by some encroaching calamity, which its obsessive musings are somehow fending off.
Jonathan Lethem, Motherless Brooklyn
247, insomnia, sleep, tourette-s