![Blackrock Microsystems NeuroPort Скачать руководство пользователя страница 46](http://html1.mh-extra.com/html/blackrock-microsystems/neuroport/neuroport_instructions-for-use-manual_2767812046.webp)
Revision 1.00 / LB-1070 – NeuroPort Biopotential Signal Processing System IFU
© 2021 Blackrock Microsystems, LLC
46
Spike Display
The spike display panel shows neural events. It contains the wave panel where
spikes can be visualized and sorting hoops can be defined, as well as the strip
chart. Use the vertical slide button at the right of the panel to set the voltage
range. The default time scale of the spike display window is 1.6 milliseconds. The
samples width of each spike can be defined in the Global Settings section in the
Hardware Configuration module within a range of 1.0 to 4.3 milliseconds.
Clear
: Clear the spike display. Automatic clearing will occur as well, maintaining
the number of spikes shown in the drop-down menu.
Show Spikes
: Select which spike units to display.
Hoops Spike Sorting
: To define a spike unit, click Define next to a unit window
box on the right side of the window. A color box will appear in the lower right of
the spike window. Drag the selector to include all contacted waveforms in the
unit. Only waveforms within a selection will be classified. The Define All button
will initialize all five units.
Unit Mapping
: Select unit definitions to remap, combine, or map to noise.
3D PCA On-line Spike Classification
: If manual PCA is selected, spike sorting
is performed using online PCA analysis within the PCA space. PCA spike sorting
can classify up to five different signals per channel, each selected signal receives
a separate color. An ISI Histogram is also displayed for each classified spike.
A user can sort an individual channel by clicking on the Feature tab. Click the
Define button next to the classified spike to sort that unit. Hold the Ctrl key and
draw around the cluster. An ellipsoid will be created which is used to define a
unit. You may also change the size of the ellipsoid by pressing R then moving the
handle.
k-means & DBSCAN PCA
: Generates ellipsoids when the k-means or DBSCAN
PCA is selected in the Feature tab.
Manual Override Options
Automatic spike sorting can be overridden on an individual channel by clicking on
the Pattern view. Click the Edit button next to the classified spike to resort to a
manual sorting option. Press <C> to see all available controls. Hold down the
<Ctrl> key and draw an ellipse in the Pattern view around the cluster that you
would like to define as a spike. You may also change the diameter of the ellipse.
Once the ellipse is placed around a cluster of points. The word “Overridden” will
appear next to the sorted unit.