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Brain gate system



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  • 1. BRAIN GATE SYSTEMGuided By: Presented By:Er. Sanjeev Singh Abhishek SrivastavaDept. Computer Science BIT (CS) III 1025410003
  • 3. INTRODUCTIONThe mind-to-movement system that allows a quadriplegic(HANDICAPED) man to control a computer using only his thoughts is done by using BRAIN GATE SYSTEM.Brain Gate is a brain implant system developed by the bio-tech company Cyberkinetics in 2008 in conjunction with the Department of Neuroscience at Brown University with Surgeon Gerhard Friehs
  • 4. PRINCIPLE OF OPERATIONThe principle of operation behind the Brain Gate System is that with intact brain function, brain signals are generated even though they are not sent to the arms, hands and legs.The signals are interpreted and translated into cursor movements, offering the user an alternate Brain Gate pathway to control a computer with thought ,just as individuals who have the ability to move their hands use a mouse.
  • 5. Brain-Computer Interface (BCI) BCI – direct communication pathway between a brain or brain cell culture and a device (computer) One way BCIs  information passes from brain to computer or computer to brain Two way BCIs  information is exchanged between brain and computer
  • 6. WORKING PRINCIPLE In general the working of BRAIN GATE SYSTEM is done using 3 techniques namely, Brain control motor function By using Neuron feedback Neuroprosthetic device
  • 7. BRAIN CONTROL MOTORFUNCTION  The brain is "hardwired" with connections, which are made by billions of neurons that make electricity whenever they are stimulated.  The electrical patterns are called brain waves.  Muscles in the bodys limbs contain embedded sensors called muscle spindles that measure the length and speed of the muscles as they stretch and contract as you move. Other sensors in the skin respond to stretching and pressure.
  • 8. NEURO FEEDBACK  A technique called neuro feedback uses connecting sensors on the scalp to translate brain waves into information a person can learn from.  The sensors register different frequencies of the signals produced in the brain.  These changes in brain wave patterns indicate whether someone is concentrating or suppressing his impulses, or whether he is relaxed or tense.
  • 9. Neuroprosthetic device  A neuroprosthetic device converts brain activity into computer commands.  A sensor is implanted on the brain, and electrodes are hooked up to wires that travel to a pedestal on the scalp. From there, a fiber optic cable carries the brain activity data to a nearby computer and artificial limbs.
  • 10. FUNCTIONING OF BRAIN GATESYSTEM-NEUROCHIP  BRAIN GATE SYSTEM is implemented with the help of NEURO CHIP.  Currently the chip uses 100 hair- thin electrodes that hear neurons firing in specific areas of the brain.  For example, the area that controls arm movement.  The activity is translated into electrically charged signals and are then sent and decoded using a program, which then converted in to movement.
  • 11. ACTUAL WORKING OF BRAIN GATESYSTEM Preprocessing Detection Control Training Bio feedback
  • 12. APPLICATIONS•A Boon to the paralyzed -Brain Gate NeuralInterface System•Clinical trial on Nagle•Statement Of Nagle “I cant put it into words. Its just—I use mybrain. I just thought it. I said, "Cursor go upto the top right." And it did, and now I cancontrol it all over the screen. It will give mea sense of independence.”
  • 13. Animals
  • 14. Diagram of the BCI developed by Miguel Nicolelis and collegues foruse on Rhesus monkeys Later experiments by Nicolelis using rhesusmonkeys, succeeded in closing the feedback loop and reproducedmonkey reaching and grasping movements in a robot arm
  • 15. BRAIN GATE CHIP SYSTEM In the next two years, Cyberkinetics hopes to refine the chip to develop a wireless version No need for a plug Safer Less visible
  • 16. The idea of moving robots or prosthetic devices not bymanual control, but by mere “thinking” (i.e., the brainactivity of human subjects) has been a fascinated approach.Medical cures are unavailable for many forms of neural andmuscular paralysis. The enormity of the deficits caused byparalysis is a strong motivation to pursue BMI solutions.So this idea helps many patients to control the prostheticdevices of their own by simply thinking about the task.
  • 17. REFERENCES Braingate gets a new lease on life , The Boston Globe, August, 2009 Monkey Moves Robot Using Mind Control , Sky News, July 13, 2009 /show/information
  • 18. Thank you