Footballers prone to brain damage that can cause dementia, says study 

Dementia is the term used to describe the symptoms of a number of illnesses that affect the brain. It is not one specific disease. The most common cause of dementia is Alzheimer’s disease. Dementia causes a progressive decline in a person’s functioning and affects a person’s thinking, behaviour and ability to perform everyday tasks.

Alasdair Middleton from Rothesay, Scotland, CC BY 2.0 , via Wikimedia Commons