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8/6/2019 Brain Computer Interface_direct Ppt
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BRAIN COMPUTERINTERFACE from fiction toreality
Date: May 5, 2010
Presented by :Ø Suman MondalØ Priyabrata MajeeØ Arpan GiriØ Chinmoy MallickØ Surajit Sannigrahi
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GENERAL
PRINCIPLEØ Signals from an array of
neurons are read
Ø Cerebral electric activityis recorded
Ø Signals are amplified &transmitted into computer
Ø
Transformed to devicecontrol commands
Ø Signals are translated intoaction
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COMPONENTS
Ø The implant device orchronic multielectrodearray
Ø The signal recordingand processing section
Ø An external device forproducing andcontrolling motion
Ø A feedback section tothe subject
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SIMPLIFIED MODEL OF BCI
SYSTEM
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BCIAPPROACHES
● I NVA
SIVE
● I NVA
SIVE
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EEG BASEDBCI FOR
TETRAPLEGICS
Ø 6- channel EEG BCIused
Ø Sensory & motorcortices activatedduring attempts
Ø Control scheme sendsmovement intention to
Prosthetic ControllerØ Prosthetic Controller
returns force sensoryinformation to Controlscheme
Ø Feedback rocessed
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‘BRAINGATE’ BCI
The ‘Braingate’device can providemotor- impairedpatients a mode of communicationthrough the translation
of thought into directcomputer control.
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FEATURESOF
BRAINGATEBCI
Ø Neural Interface Device
Ø Consists of signalsensor and externalprocessors
Ø Converts neural signalsto output signals
Ø Sensor consists of tinychip with electrodesensors
Ø Chip implanted on brainsurface
Ø Cable connects sensor
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BRAIN CONTROLLEDROBOTS Ø Robot hand mimics
subject’s fingermovements
Ø Signals extracted anddecoded by computerprogram
Ø Transferred to hand
shaped robotØ To simulate original
movement performed
Ø Robot executes
commands usingonboard sensor
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BCI MOTOR
IMAGERYClick to edit Master text stylesSecond level● Third level
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BCIAPPLICATIONS
Ø Medical applications such as Cochlear Implant, Artificial Vision etc.
Ø Military applications
Ø Counter terrorism
Ø Multimedia and virtual reality applications
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DRAWBACKSØ EEGs measure tiny
voltage potentials. The signal is weakand prone tointerference.
Ø There are chemicalprocesses involved innerve system as well,which EEGs can't pickup on.
Ø The equipment isheavy(~10 lbs.) &
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CONCLUSION
Ø A potential therapeutic
tool.Ø BCI System is
nominated for theEuropean ICT GrandPrize.
Ø Potentially high impacttechnology.
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REFERENCESØ Brain Computer Interface, www.wikipedia.org
http://en.wikipedia.org/wiki/Brain_computer_inter face
Ø Berlin Brain-Computer Interfacehttp://ida.first.fraunhofer.de/projects/bci/bbciofficial/index-en.html
Ø www.howstuffworks.comØ http://www.nanoaging.com/wiki/Brain-
computer_interfaceØ Graz Brain-Computer-Interface
http://bci.tugraz.at/index.html
THANK YOU