Eclipse Additional Information Page 80
3.20 P300 (if included in your license)
P300 and MMN are popular ALLR tests. Both of them rely on their electrical responses of the patient’s atten-
tion to the stimuli. Two different stimuli like 1kHz and 2kHz are presented randomly but with different relative
likelihood – one is frequent and the other rare (typically only 20% of the time).The patient is asked to count
all the rare stimuli and disregard the frequent ones. Two independent curves are then recorded; one for each
type of stimulus. A normal response will be a deflection around 300ms from stimulus onset (P300) on the
curve recorded for the rare stimulus.
3.20.1 Protocol settings for P300 (if included in your license)
A test designed to retrieve the P300 response phenomenon, which is present approximately 300ms after
stimulus onset. It occurs as a response to a stimulus, which differs from a stimulus to which the patient is ac-
customed. The rate between the accustomed stimulus and the rare stimulus is approximately 80/20. The test
setup must specify both the frequent stimulus and the rare stimulus, which can be adjusted from the Protocol
Setup in the field highlighted above.
For information about the test procedure please refer to the relevant quick guide.
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