New technology may allow people to move items such as a computer cursor, just by using their thoughts. The 'brainwave cap' contains 64 electrodes and allowed four people, two of them in wheelchairs, two move a computer cursor with their thoughts.

'The results show that people can learn to use scalp-recorded electroencephalogram rhythms to control rapid and accurate movement of a cursor in two directions,' said Jonathan Wolpaw and Dennis McFarlane, two of the researchers involved in the study. The study gave great hope to people who are partially or fully paralyzed. With futher development, it could make them much more self-sufficient. The cap does not require any nerves or muscles to work so it can be used by those recovering from spinal paralysis or strokes.

'The impressive non-invasive multidimensional control achieved in the present study suggests that a non-invasive brain control interface could support clinically useful operation of a robotic arm, a motorised wheelchair or a neuroprosthesis,' said the researchers.

The four subjects of the test became better at moving the cursor the longer they wore the helmet and adjusted to it.

There is still a long way to go, but brainwaves clearly hold out hope for millions who suffer from debilitating illnesses.