What is dementia?

Our brains are amazing. They work hard to store memories. They help us to make sense of the world. They control everything we think, feel, say and do. Our brains make us who we are.

Dr Brain waving


Hello! I’m Doctor Brain, your guide to the amazing universe hidden inside our heads. We’re about to find out more about our brains and memories as well as what can happen when someone has an illness called dementia.

What is dementia?

The brain is like a jigsaw. As the disease progresses the jigsaw breaks up and pieces can be lost forever.

dr brain head

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This information was updated in November 2023 and is due for review in November 2025. Please contact us if you would like a version with references.