BRAIN COMPUTER INTERFACE PPT

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CHAITANYA ENGINEERING COLLEGE VISAKHAPATNAM BRAIN COMPUTER INTERFACE Presented by: J.Santosh kumar , G.Sudhir kumar,U.Gupta prasad ELECTRONICS AND COMMUNICATION DEPARTMENT I st Year’s students

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CONTENTS -Brain Computer Interface(BCI) -Types Of BCI -Process of BCI -Applications Of BCI -Conclusion

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BCIs read electrical signals or other manifestations of brain activity and translate them into a digital form that computers can understand, process, and convert into actions of some kind, such as moving a cursor or turning on a TV. BCI can help people with inabilities to control computers, wheelchairs, televisions, or other devices with brain activity. Brain Computer Interface(BCI)

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Types Of BCI BCI Invasive techniques: Which implant electrodes directly onto a patient’s brain. Noninvasive techniques: In which medical scanning devices or sensors mounted on caps or headbands read brain signals. INVASIVE NON-INVASIVE

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INVASIVE: ● In the invasive method the electrodes are directly implanted into the brain surface ● Implanted directly into the grey matter of the brain during neurosurgery targeted repairing damaged sight

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NON-INVASIVE : ● In this method rubber cap is used by applying jelly to head ● Signals recorded in this way have been used to power muscle implants and restore partial movement in an experimental volunteer. Although they are easy to wear ● Although the waves can still be detected it is more difficult to determine the area of the brain that created them or the actions of individual neurons.

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Process of BCI: ● It is Neural interface device. ● It consists of signal sensor and external preprocessor. ● It is implanted tiny chips with electrode sensors.

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Electrode Placement: Standard “10-20 System” Spaced apart 10-20% Letter for region F - Frontal Lobe T - Temporal Lobe C - Center O - Occipital Lobe

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Pictorial representation of BCI process:

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● Recording of brain waves produced by an electroencephalogram (EEG) ● Brain waves were depend on out coming signal when electrodes implanted on brain surface -RED fluctuations indicates the movement -BLUE fluctuations indicates the rest position ELECTROENCE PHALOGRAPH:

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Applications: 1. Communication & Control As a result, BCI systems are often clumsy and awkward. TOBI will provide suitable and comfortable devices to Suppress noise Better dynamic properties of control signals Multimodal interfaces Visual Audio

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2. Motor Substitution High priority is to restore lost motor functions for the disabled. TOBI has worked on developing neuroprostheses Case-1: Two operations will be developed hand (grasping) elbow (reaching) assistive mobility Case-2: User can mentally drive mobile robot.

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Send outside signal to brain neuron -vision signal for blind person -Read the neuron signal To operate external devices without physical intervention To read memory or display user imagination Significant potential uses in medical science to assist physically disabled persons 3.Biomedical engineering

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More news headings on BCI IEEE Spectrum (Oct. 2010) “Researchers Using Rat-Robot Hybrid to Design Better Brain Machine Interfaces ” “Monkey Controls Advanced Robot Using Its Mind” “Monkey's Brain Can "Plug and Play" to Control Computer With Thought”

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Conclusion: ●The main application of BCI has been and still is to provide a means of communication and control for the most severely disabled people. ●However ,the recent advances in field have demonstrated the growing feasibility of BCI Technology which might be useful for less disabled people. ●It can expected that this increased interest in this emerging technology will lead to further rapid progress in upcoming future. ●Hopefully, the interest of the gaming industry in BCI’s will stimulate the field and produce new engaging training environments for future clinical BCI applications like BCI stroke rehabilitation and BCI neurofeedback therapies.