A while back we reported on Rewalk, the computerised exoskeleton that enables paraplegics to walk.

Rewalk is controlled by shifts in body position and the balance of weight on two walking sticks. Researchers in Belgium are attempting going one step further, however, exploring the potential of controlling the walking mechanism using brain signals.

Thanks to state of the art Electroencephalography (EEG) technology this can now be done without the need for direct tissue connection or gels that are applied to the scalp. The EU-funded Mindwalker exoskeleton is attached to a special cap worn on the head that picks up brain activity directly. The signals are amplified and sent for processing to a computer which interprets the data [dynamically] and translates it into mechanical movements.   

Unlike current muscle-controlled devices, the Mindwalker doesn't require additional support from walking sticks and can maintain its balance effectively like standing humans. This should enable it to mimic bidpedal walking more closely, freeing up the arms for other uses.

Sounds like it'll need a hefty battery, but the scientists have thought of that one too - it uses springs to recuperate some of the energy expended from the joints during movement. 

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