Scottish scientists have developed a computer the size of a matchstick head, thousands of which can be sprayed onto patients to give a comprehensive analysis of their condition.

The individual appliances, or “specks,” will form networks that can be programmed like ordinary computers.

Spraying them directly onto a person creates the ability to carry out different tests at the same time, for example muscle movement and pulse rate. This allows a complete picture of the patient’s condition to be built up quickly.