32-channel activetwo amplifier  (Cortech Solutions Inc)

Journal: PLoS ONE

Article Title: Improving the Performance of an EEG-Based Motor Imagery Brain Computer Interface Using Task Evoked Changes in Pupil Diameter

doi: 10.1371/journal.pone.0121262

Figure Lengend Snippet: The figure illustrates a conceptual overview of the software architecture used in the experiments. The BioSemi module provided a data stream containing the EEG data from the participant. The Tobii X2-30 module provided a data stream containing gaze and pupil diameter data of the participant. The SNAP module with custom scripts provided a data stream containing annotated stimulus events and markers. The Lab Streaming Layer collected and time synchronised all experimental data streams. The LabRecorder module recorded all data to file using the XDF format. Data analysis on the user study generated XDF files was carried out using the BCILAB and EEGLAB software libraries.

Article Snippet: A single BioSemi ActiveTwo electroencephalography (EEG) amplifier with 32 channels was used to monitor scalp potentials.

Techniques: Software, Generated

Journal: PLoS ONE

Article Title: Improving the Performance of an EEG-Based Motor Imagery Brain Computer Interface Using Task Evoked Changes in Pupil Diameter

doi: 10.1371/journal.pone.0121262

Figure Lengend Snippet: A legend of the symbols used in this figure is contained in the right side of the figure. The dashed red box encapsulates the method used to classify motor imagery using only the pupil signal. A moving average of the pupil diameter is continuously updated and compared to a reference baseline period right before trial start. The dotted blue box encapsulated the method used to classify motor imagery using the EEG derived signals and the CSP algorithm. The alternately dashed and dotted purple box illustrates our proposed method by which the average pupil diameter is added as an extra feature to the EEG derived feature vector used for classification. After extension of this vector, classification is carried out.

Article Snippet: A single BioSemi ActiveTwo electroencephalography (EEG) amplifier with 32 channels was used to monitor scalp potentials.

Techniques: Derivative Assay, Plasmid Preparation

Journal: PLoS ONE

Article Title: Improving the Performance of an EEG-Based Motor Imagery Brain Computer Interface Using Task Evoked Changes in Pupil Diameter

doi: 10.1371/journal.pone.0121262

Figure Lengend Snippet: Experimental Results. Average classification accuracy, Standard deviation, Kappa Coefficient and Information Transfer Rate (ITR) in bits/trial and bits/min for all classification methods split by the training and test blocks experimental approach and the 10-fold cross-validation within block experimental training approach.

Article Snippet: A single BioSemi ActiveTwo electroencephalography (EEG) amplifier with 32 channels was used to monitor scalp potentials.

Techniques: Standard Deviation, Blocking Assay

Journal: PLoS ONE

Article Title: Improving the Performance of an EEG-Based Motor Imagery Brain Computer Interface Using Task Evoked Changes in Pupil Diameter

doi: 10.1371/journal.pone.0121262

Figure Lengend Snippet: Correlations. Correlations of classification accuracy between pupil diameter and EEG, pupil and EEG+pupil as well as EEG+pupil and EEG; The table is split by the training and test blocks experimental approach and the 10-fold cross-validation within block experimental approach.

Article Snippet: A single BioSemi ActiveTwo electroencephalography (EEG) amplifier with 32 channels was used to monitor scalp potentials.

Techniques: Blocking Assay

Journal: PLoS ONE

Article Title: Improving the Performance of an EEG-Based Motor Imagery Brain Computer Interface Using Task Evoked Changes in Pupil Diameter

doi: 10.1371/journal.pone.0121262

Figure Lengend Snippet: The figure illustrates the frequency spectrum time course of EEG activity within motor imagery epochs for each participant. Event Related Desychronization in α and/or β frequency bands is apparent in some but not all participants. This is to be expected in a large pool of subjects due to the anatomical differences of cortical foldi and the resulting effects of volume conduction.

Article Snippet: A single BioSemi ActiveTwo electroencephalography (EEG) amplifier with 32 channels was used to monitor scalp potentials.

Techniques: Activity Assay