When Nigel Leigh started scanning the brains of people with amyotrophic lateral sclerosis (ALS) in the early 1990s, colleagues said he was wasting his time. ???You???ll find nothing,??? they told Leigh, who is now at King???s College London, U.K. The imaging techniques that have provided a wealth of data and scientific inspiration related to Alzheimer???s and other neurodegenerative disorders, res