User manual

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Fig. 4.11.5.1. Detection of Area of the peak more negative than the pre-pulse baseline. The Area is
measured in the range of 2 and 18 ms after the stimulus pulse (solid horizontal line). However, because
the waveform goes positive at 16 ms, the area is only measured between 2 and 16 ms after the pulse.
4.11.6 Duration
Duration calculates the duration of the peak or peaks measured between the
Peak: Auto/Pos/Neg ___ to ___ ms after pulse
time fields shown by the dotted horizontal peak line in the Pulse Detection Panel (Fig. 4.11.6.1). Just as
with the Peak Amplitude measurement, the Auto/Pos/Neg field determines whether the peak will be
Automatically (Auto) determined to be positive or negative, forced to be Positive (Pos), or forced to be
Negative (Neg).
The Duration is measured at a certain percentage of the amplitude between the DC baseline and peak
Dur: ___ % of peak
Duration can measure the duration of bursts (multiple spikes or peaks), and is therefore particularly useful
in epilepsy studies for measuring the duration of epileptiform bursts and electrographic seizures.
Fig. 4.11.6.1. Detection of Duration in the range of 4 and 25 ms after the stimulus pulse (dotted line). The
Duration is measured at 35% of the peak amplitude and is between the arrows (solid line).