WinEEG research software

WinEEG and HBIdb installation and setup

The HBI reference (normative) database includes multi-channel EEG and ERP recordings of healthy subject from 7 to 89 yo. HBI allows to compare your patient Spectra and ERP results to "norms" and find significant deviations. In HBI a 19-channel EEG is recorded in two resting conditions with eyes open (minimum 3 minutes), eyes closed (minimum 3 minutes), and five different task conditions, including two stimulus GO/NOGO tasks, arithmetic and reading tasks, auditory recognition and auditory oddball tasks. The characteristics [...]

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What information is in EDF+ annotations?

The EDF+ specification defines additional type of signal, so called "EDF annotations" signal. In EDF+ file exported from WinEEG we have 5 different annotations. EDF specification does not prohibit having several such signals in EDF+ file. Moreover, the Polyman software actually reads EDF+ files with multiple "EDF annotations" signals without any problems. The Polyman simply combines all "EDF annotations" signals into one. You can do it the same way.Labels of the beginning ERP trial with number of trial [...]

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Current Source Density (CSD) in WinEEG

Current source density analysis (CSD) is a class of methods of analysis of extracellular electric potentials recorded at multiple sites leading to estimates of current sources generating the measured potentials. CSD Montage in WinEEG is based on spherical spline algorithm (Perrin et al., 1989) to compute scalp surface Laplacian or Current Source Density estimates for surface potentials (EEG/ERP). To create "CSD montage" you need to follow following steps: Go to Montage parameters and select AvW=CSD by F.Perrin option for [...]

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Independent components (ICA) of ERPs

These independent components of ERP linearly mixed will comprise the original averaged ERP signal. Each component is an independent piece of the ERP signal, representing a stage in the processing of the perception and then the motor aspects and then the cingulate’s self monitoring of the response. Though inter-related, each piece is a separate stage in the sequential process that creates the complexity of the ERP itself. In WInEEG software we apply Infomax ICA algorithm to decompose original ERP into [...]

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Group analysis and grand average files

WinEEG allow files group analysis and creation of grand average file including Spectra and ERP data. To access group analysis you need all your EEG/Spectra/ERP files added in internal WinEEG files database. To access database of raw EEG files go to File - Open EEG Database and to access databases of Spectra/ERP results go to File - Open Another Database. This example shows raw EEG files group processing. Using SHIFT or CTRL buttons select files you [...]

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Subject response (patient button) processing setup for ERP analysis.

If you are using WinEEG+Psytask ERP system, the button response processing is programmed in WinEEG. When you record ERP you should connect patient response button to yellow socket of amplifier. You will see two red channel corresponding to clicking left and right button. To process subject respond channel while computing ERPs go to drop down menu Analysis—Compute ERP. Then you should select Digital 1 for left mouse button or Digital 2 for right button as shown below (arrow 1), after this go to next step (“Define” button, [...]

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If you want to get spectra maps for band range wider than 30 Hz

If you want to get spectra maps for band range wider than 30 Hz, you need to do next steps: 1)    Open WinEEG software, Menu—Setup—EEG Bandranges 2)    In opened window select “List name”, for example “Clinical 2” and add new bands as you need (here Ext. 1, Ext. 2 and Ext. 3) Use button “Change” to define every single band. Click OK 3)    Open the EEG file4)    Select time interval5)    Menu—Analysis—EEG Spectra In opened window select "Upper spectra frequency" 6)    Click OK and see spectra window. Switch to the map [...]

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WinEEG and e-Prime connection

WinEEG and e-Prime should work on different computers. WinEEG works on WindowXP PC but ePrime works on Windows 98 PC!!! We will call WinEEG computer as recording computer and ePrime computer as presenting computer. The main goal of connection is to synchronize the stimuli presentation process and EEG recording. e-Prime can send codes via COM port and WinEEG can catch this codes and recognize them as stimuli onsets. That is why the next steps should be done to setup this connection. 1.     Connect [...]

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LORETA & sLORETA DISTRIBUTION

Request password for Loreta installation: http://www.uzh.ch/keyinst/NewLORETA/PassWord/PassWord.htm Download link for LORETA: http://mitsar-eeg.ru/download/software/LORETA.zip Download link for sLORETA with matrix and coordinates file: http://mitsar-eeg.ru/download/software/sLORETA.zip Request password for Loreta installation: http://www.uzh.ch/keyinst/NewLORETA/PassWord/PassWordSloreta.htm How can I use LORETA for source distribution? 1.Choose two sources of activity localization you want to export to LORETA for analysis.2. Put left marker on the first event and right marker on the second. 3. Then perform command Analysis -> Source distribution (LORETA). 4. By first start WinEEG will ask you for LORETA location (C:\Program Files\LORETA\020-Main\LORETA.exe). Find following location C:\Program Files\LORETA\020-Main\ [...]

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What labels are exported to EDF+?

WinEEG can export to EDF+ format such markers as: Labels of the beginning ERP trial with number of trial typePatient response (with button) for GO task So you can see it below in Polyman software 3. Moments of the beginning photo-stimulation flash series of one frequency with digital label of this frequency in Hz and it looks like this: Other parameters (as user’s labels, markers of every photo-flash and so on) are not exported to the EDF+ files. Behavioral responses can be calculated [...]

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