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Cognitive deficits following exposure to pneumococcal meningitis: an event-related potential study
Michael Kihara1, Michelle de Haan, Eugene O Were
1The Centre for Geographical Medicine Research (Coast), Kenya Medical Research Institute, Kilifi, Kenya. mkihara@kilifi.kemri-wellcome.org
Background:
Pneumococcal meningitis (PM) is a severe and life-threatening disease that is associated with cognitive impairment including learning difficulties, cognitive slowness, short-term memory deficits and poor academic performance. There are limited data on cognitive outcomes following exposure to PM from Africa mainly due to lack of culturally appropriate tools. We report cognitive processes of exposed children as measured by auditory and visual event-related potentials.
Methods:
Sixty-five children (32 male, mean 8.4 years, SD 3.0 years) aged between 4-15 years with a history of PM and an age-matched control group of 93 children (46 male; mean 8.4 years, SD 2.7 years) were recruited from a well-demarcated study area in Kilifi. In the present study, both baseline to peak and peak-to-peak amplitude differences are reported.
Results:
Children with a history of pneumococcal meningitis had significantly longer auditory P1 and P3a latencies and smaller P1 amplitudes compared to unexposed children. In the visual paradigm, children with PM seemingly lacked a novelty P3a component around 350 ms where control children had a maximum, and showed a lack of stimulus differentiation at Nc. Further, children with exposure to PM had smaller peak to peak amplitude (N2-P1) compared to unexposed children.
Conclusion:
The results suggest that children with a history of PM process novelty differently than do unexposed children, with slower latencies and reduced or absent components. This pattern suggests poorer auditory attention and/or cognitive slowness and poorer visual attention orienting, possibly due to disruption in the functions of the lateral prefrontal and superior temporal cortices. ERPs may be useful for assessment of the development of perceptual-cognitive functions in post brain-injury in African children by providing an alternate way of assessing cognitive development in patient groups for whom more typical standardized neuropsychological assessments are unavailable.
Insights
Children with pneumococcal meningitis (PM) show altered auditory and visual processing, indicating potential cognitive deficits. Event-related potentials (ERPs) offer a way to assess cognitive development in African children post-brain injury.
Area of Science:
- Neuroscience
- Pediatrics
- Cognitive Science
Background:
- Pneumococcal meningitis (PM) is a severe disease linked to cognitive impairment.
- Limited data exists on cognitive outcomes in African children post-PM due to tool limitations.
- Auditory and visual event-related potentials (ERPs) were used to assess cognitive processes.
Purpose of the Study:
- To investigate cognitive processing in African children with a history of pneumococcal meningitis.
- To utilize auditory and visual event-related potentials (ERPs) for cognitive assessment.
- To explore the utility of ERPs in evaluating post-brain injury cognitive development in African children.
Main Methods:
- Sixty-five children with a history of PM and 93 age-matched controls were recruited.
- Auditory and visual event-related potentials (ERPs) were recorded.
- Baseline-to-peak and peak-to-peak amplitude differences were analyzed.
Main Results:
- Children with PM history exhibited longer auditory P1 and P3a latencies and reduced P1 amplitudes.
- Visual ERPs in PM-exposed children showed a lack of novelty P3a component and reduced stimulus differentiation.
- Children with PM had smaller N2-P1 peak-to-peak amplitudes compared to controls.
Conclusions:
- Children with PM history process novelty differently, with slower auditory and visual attention.
- Altered ERP patterns suggest disruption in lateral prefrontal and superior temporal cortex functions.
- ERPs provide a valuable tool for assessing cognitive development in African children post-brain injury, especially when standard assessments are unavailable.
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