Main navigation Home Information About dementia What is dementia? Dementia statistics Memory loss Types of dementia How can I find out more? Diagnosing dementia Genetics of dementia Planning ahead A coronavirus (COVID-19) update About you Resources Risk reduction Support Education Get involved Research Events About us Media Centre News and Stories Dementia Australia Careers and volunteering Campaigns Publications Information The information in this section defines dementia, describes the symptoms and causes of dementia and explains the difference between normal memory problems and dementia. What is dementia? What is younger onset dementia? Types of dementia Memory loss Behaviour and behavioural changes.