A group of scientists at the
University of Utah in Salt Lake City,
recently revealed that they may be really close to perfecting a machine
that helps translate brain signals into words, a significant
breakthrough that will allow
severely paralyzed people to be able to communicate their thoughts
clearly.
The technology, which is an extension of that developed to help
amputees obtain more control
over their prosthetic
limbs, involves placing microelectrode
grids right above the two speech centers of the brain - One above the
facial motor cortex,
the area which controls speech muscles of the mouth, lips,
tongue and face and the other, above Wernicke's
area, which scientists believe controls language
comprehension and
understanding.
A volunteer was asked to
repeatedly read 10 words like hungry, cold, hot,
hello, goodbye - common things that a
paralyzed
patient would want to communicate. Every time, he read a word, they
recorded the brain signal, observing that they were slightly different
in almost every case.
The scientists than took the experiment one step further by playing
all ten brain patterns simultaneously. In this case they were able to
pick out the correct word between 28-48 percent of the time - An
extremely encouraging result and a huge improvement over the current
way of communicating that entails either the blinking of eyes or
movement of hands.
Now that they have proof of concept, the team is going to work on getting
the technology better - by probably increasing the size of the
electrodes, so that they can get better signals. They hope to have a
working prototype ready in a year or two. Pretty awesome, unless of
course the device falls into the wrong hands
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