The P300
A) is an EEG wave that often occurs after the presentation of a momentary stimulus meaningful to the volunteer.
B) is a negative EEG wave.
C) is a far-field potential occurring 300 mm from the electrode.
D) occurs about 300 seconds prior to a response.
E) is a component of the potential evoked by a meaningless click.

Question

Quizplus · Accepted Answer

The P300 is an EEG wave that often occurs after the presentation of a momentary stimulus that is meaningful to the volunteer. It can be used as a marker for cognitive processing and attention.

Answer: C
 The P300 is a far-field potential, meaning it originates from a distant location from the electrode, and it occurs approximately 300 milliseconds after the stimulus presentation, not 300 seconds.

Answer: E
 The P300 is typically elicited by meaningful stimuli, but not by meaningless clicks. Therefore, option E is incorrect.

B and D are also incorrect, as the P300 is a positive EEG wave and it occurs after, not prior to, a response.