Background: Recent evidence suggests that speech substantially changes in ageing. As a complex neurophysiological process, it can accurately reflect changes in the motor and cognitive systems underpinning human speech. Since healthy ageing is not always easily discriminable from early stages of dementia based on cognitive and behavioural…

The performance data of individuals with Alzheimer's on language comprehension and expression tests are presented and discussed in the context of possible contributions from impaired working memory functions. It is argued that diminished scores result primarily from attenuated span capacity, difficulty focusing attention, encoding, and activation…