brain computer interface by parvez

8/7/2019 brain computer interface by parvez

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A Seminar on

Presented

By

MOHAMMED PARVEZ ALAM

1VE07EC061

Brain Computer Interface


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Introduction

Brain-computer interface (BCI) is a fast-growingemergent technology, in which researchers aim tobuild a direct channel between the human brain andthe computer.

A Brain Computer Interface (BCI) is a collaboration inwhich a brain accepts and controls a mechanicaldevice as a natural part of its representation of thebody.

Computer-brain interfaces are designed to transmitsensory information from the brain, or stimulate thebrain through articially generated electrical signals.


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SimpleSimple

introductionintroduction

of the brainof the brain


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GENERAL PRINCIPLE BEHIND BCI

Microelectrode cap


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EEG BASED BRAIN COMPUTER

INTERFACE

Alpha & beta are important for BCI


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COMPONENT OF A BCI


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FEATURE EXTRACTION OF

SIGNAL(continued)

FuRIA : An inverse solution based feature extraction

m(t) = K c(t)

where K is an Ne (3 Nv) matrix called the lead field matrix

c(t) = Tm(t)

where T is the generalized inverse of K.

where

Ne is No. of electrode m(t) is recorded signal

Nv is No. of dipole c(t) is brain dipole activity

T is generalized inverse ofK


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SIGNAL CLASSIFICATION(continued)

FUZZY INFERENCE SYSTEM

A FIS can automatically extract fuzzy rules from data, these

rules describing which input feature values correspond to

which output class, i.e. mental state.

FUZZY RULE IS AS FOLLOWS:

If X1 is Aj1 and . . . and Xi is Aji and . . . and XN is AjN Then

Class is Cj


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BCIAPPROACHES


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INVASIVE SEMIINVASIVE EEG


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TRAINING OF BCISYSTEM

TWO TYPES OF APPROACH

In the first approach the subject concentrates

on a few mental tasks. In the second approach the user has to learn

to self-regulate his or her EEGresponse.


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SOME EXAMPLES


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APPLICATIONS

Provide disabled people with communication, environment

control, and movement restoration.

Provide enhanced control of devices such as wheelchairs,

vehicles, or assistance robots for people with disabilities.

Confidentiality


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DRAWBACKS

It can cause headache.

The signal is weak and prone to interference.

The equipment is less than portable.

Connecting to the nervous could lead to the permanent brain damage.

Virus attack may occur to brain causing ill effects.


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CONCLUSION

A potential therapeutic tool.

BCI is an advancing technology promising paradigm shift in areas like MachineControl, Human Enhancement, Virtual reality and etc. So, its potentially highimpact technology.

Several potential applications of BCI hold promise for rehabilitation andimproving 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.


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THANK YOU !

brain computer interface by parvez

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