Dr. Darren Price and the Cam-CAN team have shown that age-related delay of the brainâ<80><99>s response to visual stimulation s partly explained by damage to information-carrying white matter fibres. At the same time, age-related delay to auditory stimulation is partly explained by damage to grey matter in the auditory cortex. This study is the first to find such a relationship providing important clues regarding the biological origins of cognitive decline.