Foreword xiii
Jos© DEL R. MILLAN
Introduction xv
Maureen CLERC, Laurent BOUGRAIN and Fabien LOTTE
Part 1. Anatomy and Physiology 1
Chapter 1. Anatomy of the Nervous System 3
Matthieu KANDEL and Maude TOLLET
1.1. General description of the nervous system 4
1.2. The central nervous system 5
1.2.1. The telencephalon 6
1.2.2. The diencephalon 10
1.2.3. The brain stem 12
1.3. The cerebellum 14
1.4. The spinal cord and its roots 15
1.5. The peripheral nervous system 18
1.5.1. Nerves 18
1.5.2. General organization of the PNS 19
1.5.3. The autonomic nervous system 20
1.6. Some syndromes and pathologies targeted by Brainâ"Computer Interfaces 21
1.6.1. Motor syndromes 21
1.6.2. Some pathologies that may be treated with BCIs 22
1.7. Conclusions 23
1.8. Bibliography 24
Chapter 2. Functional Neuroimaging 25
Christian BNAR
2.1. Functional MRI 26
2.1.1. Basic principles of MRI 26
2.1.2. Principles of fMRI 26
2.1.3. Statistical data analysis: the linear model 27
2.1.4. Independent component analysis 29
2.1.5. Connectivity measures 30
2.2. Electrophysiology: EEG and MEG 31
2.2.1. Basic principles of signal generation 31
2.2.2. Event-related potentials and fields 31
2.2.3. Source localization 32
2.2.4. Independent component analysis 34
2.2.5. Timeâ"frequency analysis 34
2.2.6. Connectivity 35
2.2.7. Statistical analysis 36
2.3. Simultaneous EEG-fMRI 37
2.3.1. Basic principles 37
2.3.2. Applications and data analysis 37
2.3.3. Connections between EEG and fMRI 38
2.4. Discussion and outlook for the future 38
2.5. Bibliography 40
Chapter 3. Cerebral Electrogenesis 45
Franck VIDAL
3.1. Electrical neuronal activity detected in EEG 45
3.1.1. Action and postsynaptic potentials 46
3.1.2. Resting potential, electrochemical gradient and PSPs 47
3.1.3. From PSPs to EEG 48
3.2. Dipolar and quadrupole fields 51
3.2.1. Field created by an ion current due to the opening of ion channels 51
3.2.2. Factors determining the value of the potential created by an ion current 56
3.3. The importance of geometry 57
3.3.1. Spatial summation, closed fields and open fields 57
3.3.2. Effect of synapse position on the polarity of EEG 60
3.3.3. Effect of active areasâ position 61
3.4. The influence of conductive media 62
3.4.1. Influence of glial cells 62
3.4.2. Influence of skull bones 63
3.5. Conclusions 64
3.6. Bibliography 64
Chapter 4. Physiological Markers for Controlling Active and Reactive BCIs 67
Fran§ois CABESTAING and Philippe DERAMBURE
4.1. Introduction 67
4.2. Markers that enable active interface control 72
4.2.1. Spatiotemporal variations in potential 72
4.2.2. Spatiotemporal wave variations 74
4.3. Markers that make it possible to control reactive interfaces 77
4.3.1. Sensory evoked potentials 77
4.3.2. Endogenous P300 potential 80
4.4. Conclusions 81
4.5. Bibliography 82
Chapter 5. Neurophysiological Markers for Passive Brainâ"Computer Interfaces 85
Rapha«lle N. ROY and J©r©my FREY
5.1. Passive BCI and mental states 85
5.1.1. Passive BCI: definition 85
5.1.2. The notion of mental states 86
5.1.3. General categories of neurophysiological markers 87
5.2. Cognitive load 87
5.2.1. Definition 87
5.2.2. Behavioral markers 87
5.2.3. EEG markers 87
5.2.4. Application example: air traffic control 88
5.3. Mental fatigue and vigilance 89
5.3.1. Definition 89
5.3.2. Behavioral markers 89
5.3.3. EEG markers 89
5.3.4. Application example: driving 90
5.4. Attention 90
5.4.1. Definition 90
5.4.2. Behavioral markers 91
5.4.3. EEG markers 91
5.4.4. Application example: teaching 92
5.5. Error detection 92
5.5.1. Definition 92
5.5.2. Behavioral markers 92
5.5.3. EEG markers 93
5.5.4. Application example: tactile and robotic interfaces 93
5.6. Emotions 94
5.6.1. Definition 94
5.6.2. Behavioral markers 94
5.6.3. EEG markers 94
5.6.4. Application example: communication and personal development 95
5.7. Conclusions 96
5.8. Bibliography 96
Part 2. Signal Processing and Machine Learning 101
Chapter 6. Electroencephalography Data Preprocessing 103
Maureen CLERC
6.1. Introduction 103
6.2. Principles of EEG acquisition 104
6.2.1. Montage 104
6.2.2. Sampling and quantification 105
6.3. Temporal representation and segmentation 105
6.3.1. Segmentation 106
6.3.2. Time domain preprocessing 106
6.4. Frequency representation 107
6.4.1. Fourier transform 107
6.4.2. Frequency filtering 108
6.5. Timeâ"frequency representations 109
6.5.1. Timeâ"frequency atom 109
6.5.2. Short-time Fourier transform 111
6.5.3. Wavelet transform 112
6.5.4. Timeâ"frequency transforms of discrete signals 114
6.5.5. Toward other redundant representations 114
6.6. Spatial representations 115
6.6.1. Topographic representations 115
6.6.2. Spatial filtering 116
6.6.3. Source reconstruction 118
6.6.4. Using spatial representations in BCI 120
6.7. Statistical representations 121
6.7.1. Principal component analysis 121
6.7.2. Independent component analysis 122
6.7.3. Using statistical representations in BCI 122
6.8. Conclusions 123
6.9. Bibliography 124
Chapter 7. EEG Feature Extraction 127
Fabien LOTTE and Marco CONGEDO
7.1. Introduction 127
7.2. Feature extraction 127
7.3. Feature extraction for BCIs employing oscillatory activity 130
7.3.1. Basic design for BCI using oscillatory activity 130
7.3.2. Toward more advanced, multiple electrode BCIs 131
7.3.3. The CSP algorithm 133
7.3.4. Illustration on real data 135
7.4. Feature extraction for the BCIs employing EPs 137
7.4.1. Spatial filtering for BCIs employing EPs 138
7.5. Alternative methods and the Riemannian geometry approach 139
7.6. Conclusions 141
7.7. Bibliography 142
Chapter 8. Analysis of Extracellular Recordings 145
Christophe POUZAT
8.1. Introduction 145
8.1.1. Why is recording neuronal populations desirable? 146
8.1.2. How can neuronal populations be recorded? 146
8.1.3. The properties of extracellular data and the necessity of spike sorting 147
8.2. The origin of the signal and its consequences 148
8.2.1. Relationship between current and potential in a homogeneous medium 148
8.2.2. Relationship between the derivatives of the membrane potential and the transmembrane current 150
8.2.3. âFrom electrodes to tetrodesâ 154
8.3. Spike sorting: a chronological presentation 155
8.3.1. Naked eye sorting 155
8.3.2. Window discriminator (1963) 155
8.3.3. Template matching (1964) 156
8.3.4. Dimension reduction and clustering (1965) 157
8.3.5. Principal component analysis (1968) 158
8.3.6. Resolving superposition (1972) 160
8.3.7. Dynamic amplitude profiles of action potentials (1973) 161
8.3.8. Optimal filters (1975) 162
8.3.9. Stereotrodes and amplitude ratios (1983) 165
8.3.10. Sampling jitter (1984) 168
8.3.11. Graphical tools 170
8.3.12. Automatic clustering 171
8.4. Recommendations 179
8.5. Bibliography 181
Chapter 9. Statistical Learning for BCIs 185
R©mi FLAMARY, Alain RAKOTOMAMONJY and Mich¨le SEBAG
9.1. Supervised statistical learning 185
9.1.1. Training data and the predictor function 186
9.1.2. Empirical risk and regularization 187
9.1.3. Classical methods of classification 190
9.2. Specific training methods 192
9.2.1. Selection of variables and sensors 192
9.2.2. Multisubject learning, information transfer 194
9.3. Performance metrics 194
9.3.1. Classification performance metrics 195
9.3.2. Regression performance metrics 196
9.4. Validation and model selection 197
9.4.1. Estimation of the performance metric 197
9.4.2. Optimization of hyperparameters 200
9.5. Conclusions 202
9.6. Bibliography 202
Part 3. Human Learning and Humanâ"Machine Interaction 207
Chapter 10. Adaptive Methods in Machine Learning 209
Maureen CLERC, Emmanuel DAUC and J©r©mie MATTOUT
10.1. The primary sources of variability 209
10.1.1. Intrasubject variability 210
10.1.2. Intersubject variability 211
10.2. Adaptation framework for BCIs 213
10.3. Adaptive statistical decoding 214
10.3.1. Covariate shift 214
10.3.2. Classifier adaptation 216
10.3.3. Subject-adapted calibration 218
10.3.4. Optimal tasks 219
10.3.5. Correspondence between task and command 221
10.4. Generative model and adaptation 221
10.4.1. Bayesian approach 221
10.4.2. Sequential decision 224
10.4.3. Online optimization of stimulations 226
10.5. Conclusions 229
10.6. Bibliography 229
Chapter 11. Human Learning for Brainâ"Computer Interfaces 233
Camille JEUNET, Fabien LOTTE and Bernard NâKAOUA
11.1. Introduction 233
11.2. Illustration: two historical BCI protocols 235
11.3. Limitations of standard protocols used for BCIs 237
11.4. State-of-the-art in BCI learning protocols 238
11.4.1. Instructions 238
11.4.2. Training tasks 239
11.4.3. Feedback 239
11.4.4. Learning environment 242
11.4.5. In summary: guidelines for designing more effective training protocols 243
11.5. Perspectives: toward user-adapted and user-adaptable learning protocols 244
11.6. Conclusions 247
11.7. Bibliography 247
Chapter 12. Brainâ"Computer Interfaces for Humanâ"Computer Interaction 251
And©ol EVAIN, Nicolas ROUSSEL, G©ry CASIEZ, Fernando ARGELAGUET-SANZ and Anatole LCUYER
12.1. A brief introduction to humanâ"computer interaction 251
12.1.1. Interactive systems, interface and interaction 252
12.1.2. Elementary tasks and interaction techniques 252
12.1.3. Theory of action feedback 253
12.1.4. Usability 254
12.2. Properties of BCIs from the perspective of HCI 255
12.3. Which pattern for which task? 257
12.4. Paradigms of interaction for BCIs 259
12.4.1. BCI interaction loop 259
12.4.2. Main paradigms of interaction for BCIs 260
12.5. Conclusions 265
12.6. Bibliography 266
Chapter 13. Brain Training with Neurofeedback 271
Lorraine PERRONNET, Anatole LCUYER, Fabien LOTTE, Maureen CLERC and Christian BARILLOT
13.1. Introduction 271
13.2. How does it work? 274
13.2.1. Design of an NF training program 274
13.2.2. Course of an NF session: where the eyes âlookâ at the brain 275
13.2.3. A learning procedure that we still do not fully understand 276
13.3. Fifty years of history 278
13.3.1. A premature infatuation 278
13.3.2. Diversification of approaches 279
13.4. Where NF meets BCI 281
13.5. Applications 283
13.6. Conclusions 287
13.7. Bibliography 288
List of Authors 293
Index 295
Contents of Volume 2 299
