One of the investigating hack-pack may yet find a headless chicken with Mr Robinson's teeth in it, but three weeks of investigation have produced only mice.

ECONOMIST: The hounding of Geoffrey Robinson

This study was only in mice, meaning it is not known if there would be a similar effect in people - or if there would, how early treatment would have to start.

BBC: Nerves

However, only 15% of mice who had lived in cages where the tunnels and boxes were regularly moved around, fell off at the same age.

BBC: Lifestyle link to Huntington's disease