<qa>  What is the average pain in the past few minutes?The EEG technician will collect from the participant data regarding medication used within 24 hours of assessment. Heshe will also ask the participant to rate the intensity of his or her pain just before the assessment current pain, after a few minutes of the assessment current pain and worst, least, and average pain over the past few minutes, and at the end of the EEG session current pain, and worst, least, and average pain over the past few minutes, using 0-10 Numerical Rating Scales. 