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The Web Tutorials demonstrate the following functions:
Acquisition
Several tutorials cover the various parameter settings, options, and functionality of the Acquire program.
Overall Parameters 1
The Overall Parameters tabs contain many of the settings used to configure both the amplifiers and the Acquire program for user-determined acquisition. The initial tutorial describes the Amplifiers and Channel Attributes tabs, as these are used most frequently and require more in-depth discussion.
Overall Parameters 2
The second tutorial describes the options and functions of the remaining tabs seen with Overall Parameters.
Using Fewer Channels
One of the questions that is frequently asked is, how do I create a setup file with fewer channels than are contained in the supplied setup files? This tutorial explains how to create a setup file with fewer channels, and in the process demonstrates the use of the Channel Assignment Table.
Remaining Options in Acquire
The options and features not described in the previous tutorials on Acquisition are presented in this one.
Basic AnalysisThis tutorial goes through the basic steps used to create epochs from a CNT data file, create EP averages, perform mapping, peak detection, and other basic operations. This is a good one for those just learning the Edit software.
Basic Analysis – Spectral Data
Rather than performing time domain averaging for EPs, this tutorial performs frequency domain averaging (FFT) and introduces Coherence. Also a good one for those just learning Edit.
Batch Files
Batch files are used to automate data acquistion and especially data analysis. Batch Files use Tool Command Language (Tcl), a complete programming package. However, you do not need to be a programmer to make use of batch files.
Batch Basic
Batch Files are introduced and a basic file is created to analyze a continuous data file.
Processing Multiple Data Files
This tutorial creates a batch file that applies to a series of operations to all of the data files in a folder, rather than to a single data file at a time.
Exporting and Importing Data
Exporting and importing AVG, EEG and CNT data files are demonstrated (ASCII and EDF).
Group Average
Averaging a group of AVG files in order to get a grand average is fairly straightforward; however, there are some subtleties that you need to be aware of.
Linear Derivation
Several transforms in Edit use Linear Derivation (LDR) files, and the concept of LDRs are described, with examples. Understanding LDR files will give you additional flexibility as well as a better appreciation for how certain transforms function.
MRI, EKG, and BCG Artifact Reduction
These tutorials are intended primarily for MagLink RT users, but are also relevant for those who need to remove EKG pulse artifact. The “binning” method has uses beyond ballistocardiogram (BCG) removal. Three tutorials have been created, and they should be viewed in the order shown.
EPI, EKG and BCG Reduction – Basic Operations
This tutorial explains how the fMRI Artifact and EKG Noise Reduction transforms function. It is important to understand how these transforms operate in order to use them effectively. This tutorial should be viewed before either of the other two.
BCG and Pump Noise Reduction Example – Edit and Curry
In this tutorial, ways to reduce BCG and pump noise artifact are demonstrated both in Edit (using the average and subtract method for BCG), and in Curry (using PCA Projection).
BCG Reduction – Binning
An additional method for reducing BCG can be performed using the Correlate Peaks and Subtract Average transforms (these were split out from the EKG Noise Reduction transform). “Bins” of correlated BCG artifacts are created and then subtracted from like artifacts in the CNT file. This method has advantages when the BCG artifacts change during the course of the recording.
Trigger Information
“Trigger” in this case refers to the general method for placement of event marks in the CNT data files in Scan that coincide with stimulus presentation in Stim2. TTL pulses, parameters, cable pinouts and troubleshooting methods are described. The tutorial is relevant for those encountering triggering problems with Stim2, as well as for those who are interfacing other stimulus presentation systems with Scan.
VEOG Artifact Reduction
VEOG blink artifact is perhaps the most commonly encountered artifact. Ways to remove or reject sections containing blinks are demonstrated, as well as LDR based methods to reduce the artifact (Blink Noise Reduction, Ocular Artifact Reduction, and the Spatial SVD / Spatial Filter approach). Advantages and disadvantages of all of the methods are discussed, with comparisons of the final results across methods.
Artifact Rejection
This tutorial demonstrates the various manual and automatic ways to remove or reject sections of the CNT or EEG files containing blink artifact.
Blink Noise Reduction
The Blink Noise Reduction transform is described. The transform was added to Edit primarily to give the same method that is used online. It is very similar to Ocular Artifact Reduction, with a couple of slight differences.
Ocular Artifact Reduction
The oldest and most tried-and-true method for reducing VEOG artifact is explained and demonstrated.
Spatial SVD and Spatial Filter
These transforms are used to perform a PCA decomposition of the blink artifact, and then create a spatial filter that can be designed to remove the artifact while retaining the EEG activity of interest.