脑机接口1ppt课件

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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.
Improving knowledge of how to interpret waves (not just the “new phrenology”)
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Thank you for your attention
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Brain-Computer Interface
Reporter: Number:
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CONTENTS
Introduction Theory Applications Future Work
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INTRODUCTION
what is BCI ?
A brain–computer interface (BCI), often called a mindmachine interface (MMI), or sometimes called a brain– machine interface (BMI), is a direct communication pathway between the brain and an external device.
Translation algorithm :
feature => command
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Applications
For disabled people
Communications Controwk.baidu.com Neural protheses Neural rehabilitation
For ordinary people
fig1. electroencephalogram
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theory
fig2.the structure of BCI system
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Signal Acquisition:
to measure EEG from scalp (non-invasive) or brain surface (invasive); Signal recording, amplification, digitization;
Pre-processing:
to improve signal-to-noise ratio;to improve signal-tointerference ratio
Feature extraction/selection:
to reduce dimension; to find best projection direction
Control in special environment BCI game Lie detection based on EEG/fMRI
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Future Work
Improving physical methods for gathering EEGs
Improving generalization