2.brain computer interface ppt

BRAIN COMPUTERINTERFACE

Presented by:

Shaik Abdullah Shah Alam.

Hall Ticket Number: 06J01A0524.Computer Science Engineering.Green Fort Engg. College.

Brain Computer Interface

from fiction

to reality ...

GENERAL PRINCIPLE

(a) (b) (c)

(a) In healthy subjects, primary motor area sends movementcommands to muscles via spinal cord.

(b) But In paralyzed people this pathway is interrupted.(c) A Computer based decoder is used, which translates this activity into commands for muscle control.

BACKGROUND

Signals from an array ofneurons are read.

Cerebral electric activityGenerated Is recorded.

Then Signals are amplified.

Transmitted to Computer.Transformed to Device Control Commands.Using Computer chips

and programs.

These Signals are then Translated into Actions.

BASIC COMPONENTS

An implant device,Called Electrode.

The signal recording and processing Section.

An external device.

Eg:-Like Robotic Hand.

SIMPLIFIED MODEL OF THE BCI SYSTEM

TRAINING OF BCI SYSTEM

Two different Approaches:

=> Pattern Recognition

Approach.

=> Operant Conditioning

Approach.

Development of BCIEarly work:-

Algorithms to reconstruct movements from neurons, (which control movements) were developed during 1970s.The first Brain-Computer Interface was built byimplanting neurotrophiccone electrodes into monkeys.After conducting initial studies in rats during 1990s, researchersdeveloped Brain Computer Interfaces that decoded brain activity inmonkeys and used the devices to reproduce monkey movements inrobotic arms.

Present Developments:-BCI for Tereaplegics

Brain controlled Robot

‘BRAINGATE’ BCI

ATR and HONDA’s new BCI

BCI2000

BCI APPLICATIONS

•Medical applications.

•Military applications:- To Counter terrorism (10 times Faster Image Search).

•Multimedia and Virtual reality applications.

DRAWBACKS

COMPUTATIONAL CHALLENGES AND FUTURE IMPLEMENTATIONS

•Minimal invasive surgical methods.

•Next generation Neuroprosthesis.

•Vision prosthesis.

•BCI for totally paralyzed.

CONCLUSIONA potential therapeutic tool.

BCI System is nominated for theEuropean ICT Grand Prize.

Potentially High Impact Technology.

Thank You