A scientist is hoping to enable paralysed people to stand and to walk again in a trial that includes Irish man Mark Pollock.

Mark is a blind adventure athlete who became paralysed in a fall in 2010.

He has since started working with scientists all over the world to try to figure out if there is a way he can walk again.

He uses robotic legs, called an exo-skeleton, to test the effects on his legs of walking thousands of steps every week in a gym.

Professor of Neurobiology at UCLA, Reggie Edgerton, is testing the combination of walking in the exo-suit.

It provides electrical stimulation of Mark's legs to see what the effect is.

Professor Edgerton is giving a talk in Trinity College Dublin.

He says his trials have had some successes already.