Multichannel Systems LTP-Director Manual - Manual (Page 39)

LTP-Director
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If you select the same electrodes for stimulating and recording, and you do not use the
"Blanking Feature" you will get a warning message when starting "Measurement" in test mode.
Selecting Electrodes for Online Analysis
To select electrodes for online analysis during the experiment, please click the "Select" button.
Now it is possible to select up to four electrodes that will be analyzed online. However,
data from all electrodes will be recorded, and can be analyzed offline with LTP-Analyzer.
In the electrode data display of test mode you can label electrodes according to whether
they show either somatic signals (PS = population spikes) or dendritic signals (EPSP = excitatory
postsynaptic potential).
To label an electrode as somatic, just click it. The electrode will be marked by a blue square in
the upper left corner of the channel view. To label an electrode as dendritic, hold the Shift key
and click it. The electrode will be labeled in green. If you try to select more than four electrodes,
LTP-Director will deselect the first selected electrodes.
The selected electrodes will be analyzed online, but again, data from all electrodes will be
recorded. To deselect an electrode, click or Shift click it.
In the following picture, you see a sweep from stimulation pathway S2 (traces are black).
Electrodes 62, 73 and 73 are labeled as dendritic, electrode 82 is labeled as somatic.