Signs of dementia could include sense of humour getting darker, says study

Report by UCL polled relatives and found many said patients' perception of what was funny changed dramatically and became 'inappropriate and graphic'

An increasingly twisted sense of humour could be one of the early signs of dementia, a new study has found, including laughing at inappropriate moments.

The University College London research, published in the Journal of Alzeheimer's disease, questioned the families and friends of 48 dementia patients, who had known them for more than 15 years before their disease took hold. Many of them noted that their relatives' sense of humour had changed.