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Abnormal auditory P300 topography in attention deficit disorder predicts poor response to pemoline
J M Sangal1, R B Sangal, B Persky
1Attention Disorders Institute, Troy, MI 48098, USA.
Insights
Attention deficit disorder (ADD) can be classified using P300 topography, identifying children likely to respond to pemoline treatment. Specific auditory P300 amplitude ratios predict treatment outcomes, aiding in personalized ADD management.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Pediatrics
Background:
- P300 cognitive evoked potentials assess attention and information processing.
- Attention Deficit Disorder (ADD) diagnosis and treatment response prediction remain clinical challenges.
Purpose of the Study:
- To classify Attention Deficit Disorder (ADD) using auditory and visual P300 topography.
- To identify predictors of treatment response to the stimulant pemoline in children with ADD.
Main Methods:
- Auditory and visual P300 responses were recorded from 45 ADD children and 39 controls using 31 scalp electrodes.
- Participants were treated with pemoline, and responders were compared based on P300 measures.
- A ratio of right fronto-central to parietal auditory P300 amplitude was analyzed for predictive value.
Main Results:
- No significant P300 differences were found between ADD patients and controls.
- Poor pemoline responders exhibited smaller right fronto-central auditory P300 amplitudes compared to good responders.
- The auditory P300 amplitude ratio demonstrated sensitivity (0.70) and specificity (0.76) in predicting good pemoline response (ratio > 0.5).
Conclusions:
- P300 topography can classify ADD into two groups: those with normal P300 topography and good pemoline response, and those with reduced right fronto-central auditory P300 amplitudes and poor response.
- This classification aids in predicting pemoline treatment outcomes in children with ADD.
- Pemoline treatment did not alter P300 measures.
Abstract:
P300 is a cognitive evoked potential that evaluates attention and information processing. This study uses auditory and visual P300 topography to develop a classification of attention deficit disorder (ADD), and to find predictors of treatment response to the stimulant pemoline. Forty-five ADD children ages 6 to 15 were administered auditory and visual P300 using 31 scalp electrodes. They were compared with 39 normals. Patients were treated with pemoline, and good and poor responders compared. There were no P300 differences between normals and ADD patients. Good and poor responders to pemoline were clinically identical. Poor pemoline responders had smaller right fronto-central auditory P300 amplitudes than good responders. The ratio of right fronto-central to parietal auditory P300 amplitude, had a sensitivity of 0.70 and specificity of 0.76, as a test for good pemoline response. A ratio greater than 0.5 predicted good response to pemoline, while a ratio less than 0.5 predicted poor response. Treatment with pemoline produced no P300 changes. We conclude that P300 topography classifies ADD into group 1 with normal P300 topography and good response to pemoline, and group 2 with small right fronto-central auditory P300 amplitudes and poor response to pemoline.
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