Fronto-temporal dementia Fronto-temporal dementia (including Pick’s disease) damages the front and side parts of the brain. This means people are likely to have behavioural and mood changes and may find it difficult to judge situations or plan ahead. They may do things at the wrong time or in the wrong place. Problems with memory are not as common, or occur later. Younger people, usually under 65, are more likely to be affected. This type of dementia may have an impact on the personality of a person and may not be able to inhibit behaviours they used to.