ABOUT BRAIN COMPUTER INTERFACING

1

• INTRODUCTION
• ABOUT BRAIN COMPUTER INTERFACING

1/22
2/22
2

• HUMAN BRAIN
• ELECTROCEPHALOGRAPHY
• RHYTHMIC BRAIN ACTIVITY
• ERD
• ERS

2/22
3/22
3

• TWO DIFFERENTS BCI APPROCHES
• PATTERN RECOGNITION APPROACH
• OPERANT CONDITIONNING APPROACH

3/22
4

• MEASURING EEG
• BCI COMPONANTS
• ELECTRODES
• ELECTRODE PLACEMENT
• ARTIFACTS
• FEEDBACK

4/22
5/22
5
BCI PERFORMANCE

• MEASURING ACCURACY
• BIT RATE
• CHANNEL CAPACITY

5/22
6/22
6

• DIFFERENT APPROACHES TO BCI
• BCI research at the University of Alberta
• BCI research at the Oxford University
• BCI research at the Wadsworth Center
• The Thought Translation Device (TTD)
• Graz brain-computer interface

6/22
7

• The Adaptive Brain Interface (ABI)
• Overview of the system
• Training
• Applications

7/22
7/22
8

• Summary and discussion

• Accuracy
• Speed
• Usability
• Feedback

8/22
9

• ABI SYSTEM
• HARDWARE
• SOFTWARE

9/22
10/22
10

• EXPERIMENTAL METHODS
• MENTAL TASKS
• DATA ACQUISITION

10/22
11
Bibliography
1 Brendan Allison. Brain computer interface
systems. http//bci.ucsd.edu/, 1999. 2 Niels
Birbaumer et al. The thought translation device
(ttd) for completely paralyzed patients. IEEE
Transactions on Rehabilitation Engineering,
8(2)190193, 2000. 3 Niels Birbaumer et al.
Communication in paralysis and neurological
disease. http//www.uni-tuebingen.de/uni/tci/proje
kte/als.htm, 2001.
11/22
12
Conclusion
In this work EEG-based brain computer interface
systems were reviewed and compared. Experiments
lasting five days with three subjects were done
with the new Adaptive Brain Interface
system. The comparison of the BCI systems,
especially their training duration and
performance, proved to be difficult. This was
because the results were reported differently in
most of the papers. Reporting the experiments and
results should be standardized.
12/22
13
QUESTIONS?
13/22
14
THANK YOU
14/22