People who have had their brains cryogenically frozen could be 'woken up' within three years, a pioneering Italian surgeon has claimed.

Professor Sergio Canavero, Director of the Turin Advanced Neuromodulation Group, is aiming to carry out the first human head transplant within 10 months and then wants to begin trials on brain transplants.

If the procedures are successful, he believes that frozen brains could be thawed and inserted into a donor body.

Hundreds of people who are dying or paralysed have had their bodies or brains cryogenically preserved in the hope that medical science will be able to bring them back to life and cure their conditions.