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Event-related potential correlates of impaired selective attention in children at high risk for schizophrenia
H Schreiber1, G Stolz-Born, H H Kornhuber
1Department of Neurology, University of Ulm, Germany.
Insights
Children at high risk for schizophrenia show auditory event-related potential (ERP) deficits. Reduced negative difference wave (Nd) and P3 amplitudes suggest impaired selective attention, potentially indicating predisposition.
Area of Science:
- Neuroscience
- Psychiatry
- Developmental Psychology
Background:
- Schizophrenia is a complex psychiatric disorder with a significant genetic component.
- Early identification of at-risk individuals is crucial for potential intervention.
- Auditory event-related potentials (ERPs) offer insights into neural processing and may serve as biomarkers.
Purpose of the Study:
- To investigate auditory event-related potentials (ERPs) in children at high risk for schizophrenia.
- To assess selective attention and cognitive performance in this at-risk group.
- To explore the potential of ERPs as indicators of schizophrenia predisposition.
Main Methods:
- Auditory selective listening task administered to 21 high-risk children and 21 matched controls.
- Recording of auditory event-related potentials (ERPs), focusing on negative difference wave (Nd) and P3 components.
- Behavioral assessment of selective listening task performance and general cognitive function.
Main Results:
- High-risk children exhibited significant amplitude reductions in the negative difference wave (Nd) and P3 components.
- P3 latencies were observed to be prolonged in the high-risk group.
- Reduced ERP amplitudes correlated with psychometric deficits in counting accuracy.
Conclusions:
- Deficits in selective attention, indicated by reduced Nd and P3 amplitudes, are present in a substantial number of children genetically at risk for schizophrenia.
- These ERP findings may serve as valuable indicators of a predisposition to schizophrenia.
- Further research is warranted to explore the predictive value of these neurophysiological markers.
Abstract:
Auditory event-related potentials (ERPs) associated with selective attention were recorded in 21 children at high-risk for schizophrenia and in 21 matched controls. The subjects performed a selective listening task. For behavioral evaluation, target counts on the selective listening task and on cognitive performance were assessed. Group-specific differences of ERP components could be demonstrated, as reflected by significant amplitude reductions of the frontally located negative difference wave (Nd) and of the P3 component, following selectively attended stimuli, in the high-risk children. P3 latencies tended to be prolonged in the high-risk group. Reduced Nd was found in 14 and reduced P3 in 16 high-risk children among the 21 matched pairs. Significant correlations between the ERP reductions and psychometric deficit (counting accuracy) were observed. Mismatch negativity (MMN), an ERP component associated with automatic processing of physically deviant stimuli, did not differentiate significantly between groups, but was distinctly reduced in the high-risk group. The Nd and P3 reductions suggest deficits of selective attention in a considerable number of the subjects genetically at risk for schizophrenia. The present findings are discussed with respect to their relevance as indicators of a predisposition to schizophrenia.