Brain-Computer Interfaces for Communication and Control

Presentation on theme: "Brain-Computer Interfaces for Communication and Control"— Presentation transcript:

1 Brain-Computer Interfaces for Communication and Control
CACM, May 2011

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5 Hans Berger (1924)

6 한계 뇌세포  두피 사이의 거리 환경 잡음 신호가 약해짐 매우 많은 뇌세포의 일괄적 행위만 탐지 전력선
심장, 근육, 눈으로부터의 잡음

7 두 가지 패러다임 Evoked Potentials Oscillatory features Transient waveforms
Brief Perturbation Phase-locked to an event Time-Domain Oscillatory features Not phase-locked Spectral analysis

8 BCI (1977)

9 용어 N100-P200 N: Negative Peaks P: Positive Peaks
Numbers: The approximate latency in msec

10 Varieties of BCI Signals

11 P300-based Spelling Device (1988)

12 Cursor Control (1991)

13 Cursor Control (2002)

14 Others MEG fMRI fNIR

15 System Design

16 Issues Offline analysis vs. Online analysis
BCI data classification competition Winning entry  Linear classifiers (Fisher’s discriminant and linear support vector machine) Training users  “zero training” Non-brain activity (eye movement, blinks, facial muscles)

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18 Applications

19 Applications Spelling System Wheel Chair Humanoid Robot Video Game

20 Emotiv

21 NeuroSky

22 Conclusion

23 BCI 2000

24 Home BCI System