Jul 302012
 

“It doesn’t take very much practice either.”

A new technology described in the paper published online on July 26 in Current Biology, a Cell Press publication, might allow people who have almost completely lost the ability to move their arms or legs to communicate freely, by using their eyes to write in cursive. The eye-writing technology tricks the neuromuscular machinery into doing something that is usually impossible: to voluntarily produce smooth eye movements in arbitrary directions.

“Contrary to the current belief, we show that one can gain complete, voluntary control over smooth pursuit eye movements,” says Jean Lorenceau of Université Pierre et Marie Curie-Paris. “The discovery also provides a tool to use smooth pursuit eye movements as a pencil to draw, write, or generate a signature.”

The advance could be of great benefit for people deprived of limb movements, such as those with Lou Gehrig’s disease (also known as ALS), the researchers say. It might also help to improve eye movement control in people with certain conditions such as dyslexia or ADHD and/or for experts, such as athletes or surgeons, whose activities strongly rely on eye movements.

In everyday life, smooth pursuit eye movement is used to track moving targets, Lorenceau explains. While people do have the ability to move their eyes in exquisitely sophisticated ways — and in fact our eyes never cease to move — it is normally impossible to control those movements smoothly in any direction.

Read more . . .

via Science Daily
 

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