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SEPs to median nerve stimulation: normative data for paediatrics
1Division of Neurology, and Research Institute, Hospital for Sick Children, University of Toronto, Canada.
Electroencephalography and Clinical Neurophysiology
|September 1, 1988
Summary
This study provides normative somatosensory evoked potentials (SEPs) data for children and adolescents, revealing distinct maturation patterns in the nervous system. These findings are crucial for interpreting SEPs in pediatric neurology.
Area of Science:
- Neuroscience
- Developmental Biology
- Clinical Neurology
Background:
- Somatosensory evoked potentials (SEPs) are vital for assessing the nervous system in pediatric neurology.
- Interpreting SEPs requires understanding developmental changes in waveform and latency.
- Clinical examination can be challenging in young children, increasing the reliance on neurophysiological tests.
Purpose of the Study:
- To establish normative SEP data for individuals aged 4 months to 35 years.
- To characterize non-linear maturational patterns in spinal and central nervous system pathways.
- To provide a functional assessment of neural pathways with varying myelination and maturation rates.
Main Methods:
- Collected SEP data from a cohort spanning 4 months to 35 years.
- Analyzed latency changes in cervical components (N12, N13), N20, and P22.
- Assessed waveform morphology and interpeak latencies, including central conduction time (N13-N20).
Main Results:
- Distinct non-linear maturational patterns observed in spinal and central nervous system segments.
- Cervical components (N12, N13) showed minimal latency change until 2-3 years.
- N20 latency decreased until 2-3 years, P22 until 6-8 years, with subsequent latency increases towards adulthood.
- Adult waveform morphology achieved early (by 1 year), but central conduction time reached adult values later (6-8 years).
Conclusions:
- Normative SEP values during maturation were established.
- Significant age-related changes in SEP latencies and morphology were identified.
- Understanding these developmental trajectories is essential for accurate SEP interpretation in pediatric neurology.