BRAIN COMPUTER INTERFACE

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BRAIN :

BRAIN COMPUTER INTERFACE

CONTENTS:

CONTENTS INTRODUCTION BCI MODEL HOW DOES IT WORK? PRINCIPLE OF OPERATION WHAT IS AN EEG? BCI APPROACHES WHY BCI? APPLICATIONS ADVANTAGES DISADVANTAGES FUTURE WORK CONCLUSION REFERENCES

INTRODUCTION:

INTRODUCTION Brain-computer interface (BCI) is a fast-growing emergent technology, in which researchers aim to build a direct channel between the human brain and the computer. A Brain Computer Interface (BCI) is a collaboration in which a brain accepts and controls a mechanical device as a natural part of its representation of the body. Computer-brain interfaces are designed to restore sensory function, transmit sensory information to the brain, or stimulate the brain through artificially generated electrical signals.

BCI MODEL:

BCI MODEL

HOW DOES IT WORK????:

HOW DOES IT WORK ???? CONTD…

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CONTD…

PRINCIPLE OF OPERATION:

PRINCIPLE OF OPERATION

WHAT IS AN EEG??:

WHAT IS AN EEG?? An electroencephalogram is a measure of the brain's voltage fluctuations as detected from scalp electrodes. It is an approximation of the cumulative electrical activity of neurons. EEG measures the electrical activity of the brain with multiple electrodes placed on the scalp It is portable and relative inexpensive that is why most noninvasive BCIs are presently based on EEG.

BCI APPROACHES:

BCI APPROACHES

INVASIVE:

INVASIVE Invasive BCIs are implanted directly into the grey matter of the brain during neurosurgery. As they rest in the grey matter, invasive devices produce the highest quality signals of BCI devices but are prone to scar- t issue build-up, causing the signal to become weaker or even l ost as the body reacts to a foreign object in the brain.

SEMI-INVASIVE:

SEMI-INVASIVE SEMI-INVASIVE BCI devices are implanted inside the skull but rest outside the brain rather than amidst the grey matter. They produce better resolution signals than non-invasive BCIs where the bone tissue of the cranium deflects and deforms signals and have a lower risk of forming scar-tissue in the brain than fully-invasive BCIs. Electrocardiography (ECoG) uses the same technology as non-invasive electroencephalography, but the electrodes are embedded in a thin plastic pad that is placed above the cortex, beneath the Dura mater. single neurons but require less contact with tissue and reduce the risk of scar-tissue build up.

NON-INVASIVE:

NON-INVASIVE BRAINWAVES PRODUCED BY EEG Non-invasive implants produce poor signal resolution because the skull dampens signals, dispersing and blurring the electromagnetic waves created by the neurons. Easy to wear.

WHY BCI?????:

WHY BCI????? BCI is a new neuroscience paradigm that might help us better understand how the human brain works. BCI research allows us to develop a new class of bioengineering control devices and robots. BCI hold promise for rehabilitation and improving performance. BCI can expand possibilities for advanced human computer interfaces (HCIs ).

APPLICATIONS:

APPLICATIONS MENTAL TYPEWRITER BCI offers paralyzed patients improved quality of life. MILITARY and CIVIL RESEARCH. Allow patients to control a computer by conscious changes of brain activity.

ADVANTAGES:

ADVANTAGES DIRECT COMMUNICATION between human brain and computers. Better LIVING, more FEATURES, more ADVANCEMENT in technologies etc. New work area for scientists and researches around the world. LOW BANDWIDTH.

DISADVANTAGES:

DISADVANTAGES Virus attacks may occur to brain causing ill effects. Requires extensive training. BCI techniques are costly. Slow speed.

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Current projects BRAIN GATE HONDA ASIMO CONTROL GAMING CONTROL BIONIC EYE Future work Improving physical methods for gathering EEGs. Improving generalization. Improving knowledge of how to interpret waves.

CONCLUSION:

CONCLUSION A potential therapeutic tool. BCI is an advancing technology promising paradigm shift in areas like Machine Control, Human Enhancement, Virtual reality and etc. So, it’s potentially high impact technology. Several potential applications of BCI hold promise for rehabilitation and improving performance, such as treating emotional disorders (for example, depression or anxiety), easing chronic pain, and overcoming movement disabilities due to stroke . Will enable us to achieve singularity very soon. Intense R&D in future to attain intuitive efficiency.

REFERENCES:

REFERENCES www.elecdesign.com www.brainlab.org www.en.wikipedia.com/braincomputerinterface www.howstuffworks.com

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Thanks For Your Precious Time…. SUBMITTED BY:- Radha Chaudhary E.C (VIth Sem)- B 0903031080