December 22, 2005: NG 2.2.5 Adds an update for the import of BrainMaster 2.0 EEG files for both the standard 1 or 2 channel recordings and the Mini-Q with 256 Hz sample rates. Also, Nicolet native formatted EEG files can be imported into NeuroGuide. This includes the Nicolet Bravo Intuition, Nicolet AllianceWorks, Nicolet UltraSom NT and Nicolet BMSI-6000.
December 15, 2005: NG 2.2.4 adds instantaneous coherence phase JTFA color maps that change as one drags the mouse over the EEG tracings. Click View > Dynamic JTFA > Coherence or Phase and then select Color Maps to view the topographic maps. Instantaneous Z scores can also be viewed in dynamic topographic color maps. In addition, a JTFA edit option is added in which one can include or exclude EEG features that meet specific criteria, e.g., instances where there is greater than 2 st. dev. of theta activity in F4, etc.
October 28, 2005: NG 2.2.2 adds dynamic JTFA color maps that instantly change as one drags the mouse over the EEG tracings. Click View > Dynamic JTFA > Absolute Power and then select Color Maps to view the topographic maps. Instantaneous Z scores can also be viewed in dynamic topographic color maps.
October 4-5, 2005: NG 2.2.1 includes a Time Domain normative database and display Click View > Time-Frequency Analysis to activate this new feature. Position the mouse over the EEG tracings and depress the left mouse button to observe the instantaneous power values and the instantaneous Z scores.
September 6, 2005: NG 2.1.9 streamlines and customizes the Report Generator by the addition of the ability to save and load report selections. The Report itself also includes more options than it did previously which provides better control over the report.
August 29, 2005: NG 2.1.8 is the same as NG 2.1.7 but with added import capability for Grass-Telefactor, BrainScope and Cadwell Spectrum-32 EEG data files. NeuroBatch was upgraded to automatically process Cadwell Spectrum-32 EEG data files including multiple EEG session recordings.
July 22, 2005: NG 2.1.7 is identical to NG 2.1.6 except that the preliminary video monitor code has been removed because of installation problems that occurred with NG 2.1.6 on some computers. A refined and final Video module will be included in a future update.
July 12, 2005: The update in NG 2.1.6 is restoration of coherence, amplitude asymmetry and phase defaults in Report Generate. Otherwise NG 2.1.6 is identical to NG 2.1.5.
July 1, 2005: The updates in NG 2.1.5 are: Calculation of weighted mean frequency for different frequency bands (see NeuroGuide Help > Appendix B), and a normative database with Z scores of weighted mean frequency from 2 months to 82 years of age for each frequency band; 2- change in the default settings to reduce the memory load after clicking Generate Report; 3- default polarity of traces is positive down to be consistent with conventional EEG preferences; and 4- a bug fix in the import of text or ASCII data.
June 21, 2005: The update in NG 2.1.4 is the addition of bipolar normative databases and normative databases for all possible common reference montages based on the International 10/20 system of electrode placement.
June 16, 2005: The update in NG 2.1.3 is a bug fix of NG 2.1.2 which prevented importing Mindset 24 channel EEG files. Otherwise NG 2.1.3 is identical to NG 2.1.2.
June 1, 2005: Expansion of the Bipolar Montage capability of NeuroGuide to 128 possible bipolar combinations. This means that there are no restrictions for the creation of bipolar montages. Longitudinal (Banana), Transverse, Circular and Mixed Longitudinal and Transverse montages are included among the standard montages in the NeuroGuide Montage window that can be accessed by a mouse click. All other features of NeuroGuide are the same.
May 19, 2005: NeuroGuide 2.1.1 Added: 1- Expansion from 30 Hz to 40 Hz for all raw data analyses, including LORETA current density and LORETA Source Correlations. Normative Z scores will remain limited to 30 Hz; 2- Added a 3-dimensional color contour map for raw LORETA source correlations (LSC) and the LORETA source correlation normative database; and 3- Changed the default for JTFA of Number of Terms = 1. This change makes it easier to learn JTFA. For example, reduced residual values as one adds additional Gabor Atoms to the JTFA calculation. All other features of NeuroGuide are the same.
April 14, 2005: NeuroGuide 2.1 Added: 1- LORETA normative source correlation (NSC) database using normal subjects from 6 months of age to 82 years of age. The NSC norms involve the correlation between 46 different regions of interest (ROIs). The skewness, kurtosis and cross-validation accuracies of the normative database are shown in the NeuroGuide Help (see Appendix G). The NSC is an add on product; and 2- Enhancement of the Joint-Time-Frequency-Analysis (JTFA) in which users can deconstruct and reconstruct an EEG time series by selecting and deselecting Gabor Atoms. All other features of NeuroGuide are the same.
March 2, 2005: NeuroGuide 2.0.9 Added: 1- the ability to save calibration settings in the Signal Generation program; and 2- added the option of computing a square root transform of LORETA squared current source vectors.
February 10, 2005: NeuroGuide 2.0.7 Added: 1- LORETA 3-Dimensional Source Correlation; and 2- Changes in the NeuroGuide menu options in which Analysis was changed to Tools and Dynamic FFT was moved from the Edit menu to the View menu. All other features are the same. The LORETA Source Correlations allow one to measure the coupling between 3-D brain regions (ROIs) and the rest of the brain. For example, was the anterior cingulate gyrus positively or negatively correlated with the right parietal lobe? or with the hippocampus?, etc. Users can select regions of interest by anatomical name or by Brodmann Area as well as ROIs located in the left hemisphere, right hemisphere or both hemispheres.
January 31, 2005: NeuroGuide 2.0.6 Added: 1- JTFA absolute values, arrow keys and page up and page down controls and added cursor crosshairs to identify time and frequency; and 2- improvements in the aesthetics of the NeuroGuide edit window.
January 21, 2005: NeuroGuide 2.0.5 Added: 1- Joint-Time-Frequency-Analysis using the Adaptive Gabor Transform, also called Matching Pursuit. To activate JTFA click Analysis > Joint Time Frequency Analysis. See the NeuroGuide manual at Help > NeuroGuide Help for a brief description of this new tool. JTFA is used to dissect and explore the fine details of EEG dynamics. The frequency range of JTFA is 0 to 40 Hz; and 2- changed the appearance of the NeuroGuide edit screen to make the edit screen a little more aesthetic and simpler.