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Age-related changes of the somatosensory evoked potentials in healthy children
Ina E Geneva1, Maya B Krasteva, Stefan S Kostianev
1Department of Pediatrics and Medical Genetics, Medical University, Plovdiv, Bulgaria.
Insights
Somatosensory evoked potentials (SEPs) in children show significant age-related changes, with maturation of neural pathways evident from infancy through adolescence. Latencies decrease and amplitudes increase with age, reflecting neural development and myelinization.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Clinical Electrophysiology
Background:
- Somatosensory evoked potentials (SEPs) are crucial for assessing the integrity of the somatosensory nervous system.
- Understanding normative SEP development in children is essential for diagnosing neurological disorders.
Purpose of the Study:
- To investigate the configuration and latency of SEPs in healthy children from the neonatal period to adolescence.
- To establish age-specific reference values for pediatric SEP development.
Main Methods:
- SEPs were recorded in 67 healthy children (0-16 years) using median nerve stimulation.
- Standard electrophysiological techniques with specific electrode placements (C3'/C4' to Fpz) and filter settings (10-1000 Hz) were employed.
Main Results:
- Neonatal SEPs exhibit low amplitude and wide base, maturing to adult-like configurations by age 3.
- Wave latencies (P15, N20, P25) decrease with age until 9 years, then lengthen, correlating with height.
- Interpeak latencies decrease, while N20/P25 amplitude increases with age, indicating neural maturation and myelination.
Conclusions:
- Age-related changes in SEPs reflect the developmental trajectory and maturation of neural pathways in children.
- Myelination of neural pathways is a key factor in the observed SEP maturation from infancy to adolescence.
Aim:
The aim of the study was to investigate the configuration and latency of the somatosensory evoked potentials (SEPs) in healthy children for the time from the neonatal period to adolescence.
Material And Methods:
SEPs were recorded in 67 healthy children--37 boys and 30 girls from 0 to 16 years of age by means of median nerve stimulation. The active electrode was placed above the contralateral parietal cortex on places C3' and C4' and the reference electrode--on Fpz. The filters were 10-1000 Hz and the frequency of the electric stimulus--3 Hz.
Results:
The depression of the potential in the neonatal period is accounted for by the wide base and low amplitude of SEPs. The configuration of SEPs is identical with that of adult individuals after 3 years of age. The latencies of the waves P15, N20 and P25 decrease progressively with age and lengthen in the period from 9 to 16 years of age, with the increase of height. The interpeak latencies P15 - N20, N20 - P25 and P15 - P25 decrease with age, while the amplitude N20/P25 increase with age. We found significant variability in the amplitude of the potential, most pronounced in the neonatal period. It gradually decreases by 10-14 months of age and after that remains unchanged. We did not find any differences at stimulation between the left and the right hand.
Conclusion:
The age-related changes in SEPs reflect the trends of the development and the maturation of the neural pathways and their better myelinization.