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WinEEG offers a complete analysis package.
WinEEG basic version is a full software that allows the recording, editing and analysis of continuously recorded EEG using a Mitsar amplifier. WinEEG basic version is included with all Mitsar-201 amplifiers.
WinEEG advanced version allows the user all of the functions of the basic version and additionally the ability to import non-Mitsar format files, record Evented Related Potential data (with the use of PsyTask), and to perform database comparisons (with the addition of the HBI database). WinEEG is included with Mitsar-202 amplifiers and can be added to the purchase of Mitsar-201 amplifiers for an additional fee.
The Human Brain Institute normative database requires WinEEG advanced version and an additional fee.
All functions listed on this page are available
in WinEEG basic version unless otherwise indicated by an asterisk* and italics. Where indicated by the * an additional
fee may be required.
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Recording
The EEG (up to 32 channels) is stored on the hard disk and available for subsequent analysis. During recording, the signals are continuously displayed on the screen. EEG can be recorded synchronously with visual and acoustic stimuli presentation for ERP/ERD studies*. ERPs and ERDs are computed in psychological tasks of various designs. The task design is performed by Psytask* or by the conventional Presentation software (Presentation, E-Prime). During EEG recording photoflash* may be controlled manually or using predefined program. Automatic impedance measurement procedure helps to control a quality of electrodes setting.
Display
A flexible review program allows fast display of the EEG on the computer monitor and immediate access to any part of the recording. Ten user definable labels may be used to mark EEG recordings for future quick access to this part. Montages and filters Recorded EEG can be displayed in different montages: monopolar, bipolar, average reference, weighted average reference and etc. EEG can be filtered by IIR digital filters to change frequency band of recording to and eliminate environmental noise (50 or 60 Hz). Also EEG can be filtered by high order FIR filters. Spectral analysis and Brain Mapping
WinEEG software includes the multichannel spectral analysis, brain mapping and coherence. Power spectra and coherence can be computed for any selected part of recorded EEG. Different parameters of spectra computed for predefined frequency band ranges can be displayed as histograms, maps and tables. The spectra data can be exported to other applications (standard statistical packages such as STATISTICA* or SPSS* ) by using ASCII format for a future statistical analysis.
Automatic spike detection
Spike detector automatically detects, marks and averages spikes and sharp waves in EEG recording. High effective algorithm of automated spike detection based on both estimation of amplitude-temporal parameters of waveforms and equivalent dipole source applying to both raw EEG and decomposition of multi channel EEG on components (using PCA or ICA) helps to search for paroxysmal activity in long-term EEG records. Manual correction of results of spike detection algorithm provides a possibility to eliminate artifacts. Averaging of similar spike waveforms increases an accuracy of measurement. Dipole source localization Build in equivalent dipole localization algorithm help to identify a brain position of source of paroxysmal activity.
Build-in patient database for organization
All patient information including EEG waveform and video can be saved to build-in database or written on CD. Build-in database helps to automatically search recording and provide automatically data processing, data averaging and exporting. In addition all data can be stored and reviewed on any Windows-based PC.  |
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Video EEG
With the use of the video EEG option* and WinEEG Advanced version* the EEG can be recorded synchronously with video movie from one or two cameras and audio signal from microphone. Together with on-line MPEG4 compression of video signal and on-line MPEG3 compression of audio signal this feature provides long-term video EEG monitoring. Fast positioning to any selected time moment of video EEG record and playback of all recorded signals provide effective analysis of data.
Artifacting
The EEG can be reviewed and artifacts selected manually or advanced artifact rejection mode provides easy and fast search and elimination of bad EEG epochs. Artifact correction procedures are based on PCA or ICA decomposition of raw EEG and special filtering helps to increase quality of EEG record.
Event Related Potentials, Event Related De/Synchronization, and Wavelet Analysis
With the use of WinEEG Advanced version* and PsyTask software* visual and acoustic stimuli can be presented during the EEG recording so that event-related potentials (ERPs), event-related wavelet transform event-related de/synchronization (ERD/ERSs) and parameters of task performance (omission, commission errors, reaction time and its variance, measuring by special button) are computed off-line. Visual and auditory stimuli are presented on separate computer. A set of conventional psychological tasks is provided. Latencies, amplitudes and topographic maps of different types of ERPs components (such as P300, mismatch negativity, GO/NOGO), of desynchronization and synchronization components in different frequency bands can be measured and statistically assessed.
3D mapping
3D mapping of data can be performed by LORETA software to which mapped data is transferred automatically Human Brain Institute (HBI) normative database*
EEG spectra, coherence and ERP components computed for a given patient can be compared with the Human Brain Institute (HBI) normative data base. The results of comparison are presented as maps of deviations from normality. The normative data base includes 3 minute fragments of EEG recorded in eye open, eyes closed conditions and in four different tasks (two stimulus GO/NOG task, Math, Reading and Acoustic tasks). Click here to learn more about the HBI Normative Database Averaging and data processing automation
The spectra, coherence, ERP, ERD and etc. can be process in automated mode for collection of recording selected by user. The results of processing will be automatically stored to build-in database. The spectra, coherence, ERP, ERD and etc. can be averaging automatically mode for collection of recording selected by user. Exporting and importing the data Raw EEG can be exported to files with different formats such as ASCII, Binary, EDF and etc. Raw EEG can be imported with WinEEG advanced version* from file with next formats EDF, UDF, ASCII, LEXICOR, NeuroScan v.4. EEG spectra, coherence, ERP, ERD and parameters of task performance can be exported to ASCII file automatically for collection of recordings selected by user. |
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Nova Tech EEG, Inc * Mesa, Arizona * USA *
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