Posterior cortical atrophy (PCA) means ‘back of the brain shrinkage’. It’s a rare form of dementia caused by damage to cells at the back of the brain, which predominantly affects the processing of visual and spatial information. In this scan, you can see the damage spreading through the brain over time. Eventually, a person’s memory, speech and problem-solving skills will be affected. As time passes, people will need more support in their daily life and help to look after themselves. This often