amphetaminism

Later still, her images became highly stylized, intricate, with obsessed, repetitive motifs, labyrinthine, until they resembled Louis Wain's crystalline cats. Such drawings are also rather characteristic of Tourette's syndrome — the original form, the original thought, lost in a jungle of embellishment — and in the so-called 'speed-art' of amphetaminism.

1973, Oliver Sacks, Awakenings