Perhaps a new component of the senior questionnaire?

BBC News – Big head ‘may protect against dementia’

Having a big head may help protect against the worst ravages of dementia, say researchers.

They found that people with Alzheimer’s with the largest craniums had better memory and thinking skills than patients with smaller skulls.

The Munich University team believe a larger head means there are greater brain reserves to buffer against dementia-related brain cell death.

Their findings, based on 270 patients, are published in the journal Neurology.