Chapter 2. Using NeuroScope

Table of Contents

Starting a New Session
Palettes
Anatomical Groups and Spike Groups
Units
Events
Editing Channel Groups
Creating a New Group
Discarding Bad Channels
Skipping Channels
Moving Channels between Groups
Reordering Channels within a Group
Reordering Groups
Synchronizing Anatomical and Spike Groups
Removing Channels from a Spike Group
Managing the Display
Selecting Channels
Channel Colors
Showing and Hiding Channels
Adjusting Amplitudes and Offsets
Advanced Display Management
Multiple Column Mode
Labels and Calibration Bars
View Mode and Edit Mode
Using Multiple Displays
Browsing Local Field Potentials
Tools
Zoom
Draw Time Line
Select Channels
Measure
Select Time
Select Event
Add Event
Unit Activity
Displaying Unit Activity
Browsing Unit Activity
Events
Displaying Events
Browsing Events
Editing Events
Positions
File Properties
Printing and Exporting
Printing
Exporting
Session Management

Starting a New Session

To start a new session, select File->Open. In the Open dialog, you can select any type of data file (dat, eeg, nrs or xml: see File Formats).

A session can also be started from Konqueror by clicking on one of the above files, or on the command line by typing:

% neuroscope filename

First, NeuroScope needs some information about the acquisition system. You will be prompted to provide this information in the Properties dialog. More generally, this dialog is where you can set all the parameters for the various files you view and edit (this will be presented in later sections of this manual). For now, suffice it to introduce the Channels tab, which is the only one enabled at this point.


File Properties.

All the fields are self-explanatory, but these fields may need clarification:

  • Initial offset: some acquisition systems record the data with a fixed offset; this can be specified here so that NeuroScope can recenter all the channels in the display.

  • Voltage range: the total voltage range, e.g. if the system is set to ±5V, the range is 10V.

  • Screen gain: millivolts per screen centimeter when the magnification level is set to 1x.

The information provided in the Properties dialog can be later displayed and modified at any time by selecting File->Properties.

When starting NeuroScope from a terminal, this information can also be provided as command line options. To list available options, type

% neuroscope --help
Usage: neuroscope [Qt-options] [KDE-options] [options] file

NeuroScope - Viewer for local field potentials, spikes and events

Generic options:
  --help                    Show help about options
  --help-qt                 Show Qt specific options
  --help-kde                Show KDE specific options
  --help-all                Show all options
  --author                  Show author information
  -v, --version             Show version information
  --license                 Show license information
  --                        End of options

Options:
  -r, --resolution          Resolution of the acquisition system.
  -c, --nbChannels          Number of channels.
  -o, --offset              Initial offset.
  -m, --voltageRange        Voltage range.
  -a, --amplification       Amplification.
  -g, --screenGain          Screen gain.
  -s, --samplingRate        Sampling rate.
  -t, --timeWindow          Initial time window (in miliseconds).

Arguments:
  file                      Document to open.

The options provided on the command line will be displayed in the Properties dialog.

Once the information is properly set, the first 1000 ms of data are loaded and displayed in the main window, which should look like this:


initialView.

Note: if the channel amplitudes are too large, they can be easily adjusted (see Traces).

The window contains two functionally distinct areas: the Palettes on the left, and the Display containing a Trace View on the right. These will be discussed in the following sections.