About
An
implantable brain-computer interface the size of an aspirin has been clinically
tested on humans by American company Cyber kinetics. The 'Brain Gate' device
can provide paralyzed or motor-impaired patients a mode of communication
through the translation of thought into direct computer control. The technology
driving this breakthrough in the Brain-Machine-Interface field has a myriad of
potential applications, including the development of human augmentation for
military and commercial purposes. Brain Gate system in the current human
trials, a 25 year old quadriplegic has successfully been able to switch on
lights, adjust the volume on a TV, change channels and read e-mail using only his
brain. Crucially the patient was able to do these tasks while carrying on a
conversation and moving his head at the same time. John Donoghue, the chairman
of the Department of Neuroscience at Brown University, led the original
research project and went on to co-found Cyber kinetics, where he is currently
chief scientific officer overseeing the clinical trial. It is expected that
people using the Brain Gate system will employ a personal computer as the
gateway to range of self-directed activities. These activities may extend
beyond typical computer functions (e.g., communication) to include the control
of objects in the environment such as a telephone, a television and lights.
Usually the brain is connected to an external computer system through a chip
composed of electrodes.
Invasive Bcis
Invasive
BCI research has targeted repairing damaged or congenitally absent sight and
hearing and providing new functionality to paralyzed people. There has been
great success in using cochlear implants in humans as a treatment for non
congenital deafness, but it's not clear that these can be considered
brain-computer interfaces. There is also promising research in vision science
where direct brain implants have been used to treat non-congenital blindness.
One of the first scientists to come up with a working brain interface to
restore sight was private researcher, William Dobelle. Dobelle's first
prototype was implanted into Jerry, a man blinded in adulthood, in 1978. A
single-array BCI containing 68 electrodes was implanted onto Jerry’s visual
cortex and succeeded in producing phosphenes. The system included TV cameras
mounted on glasses to send signals to the implant. Initially the implant
allowed Jerry to see shades of grey in a limited field of vision and at a low
frame-rate also requiring him to be hooked up to a two-ton Mainframe. Shrinking
electronics and faster computers made his artificial eye more portable And
allowed him to perform simple task sun assisted.
Abstract
Thousands
of people around the world suffer from paralysis, rendering them dependent on
others toper form even the most basic tasks. But that could change, because of
the latest achievements in the Brain-Computer Interface (BCI), which could help
them regain a portion of their lost in dependence. Even normal humans may also
be able to utilize Brain Chip Technology to enhance their relationship with the
digital world-provided they are willing to receive the implant. The term
‘Brain-Computer Interface’ refers to the direct interaction between a healthy
brain and a computer. Intense efforts and research in this BCI field over the
past decade have recently resulted in a human BCI implantation, which is a
great news for all of us, especially for those who have been resigned to
spending their lives in wheel chairs.
Conclusion
Here
by, we conclude that neural interfaces have emerged as effective interventions
to reduce the burden associated with some neurological diseases, injuries and
disabilities. The Brain Gate helps the
quadriplegic patients who cannot perform even simple actions without the
help of another person are able to do things like checking e-mails, turn the TV
on or off, and control a prosthetic arm— with just their thoughts.
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