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Electrically elicited blink reflex in children
Insights
The blink reflex in children shows developmental differences compared to adults. This reflex may indicate brain stem and nerve pathway myelination in pediatric patients.
Area of Science:
- Neurology
- Pediatrics
- Neurophysiology
Background:
- The blink reflex is a standard neurological examination.
- Understanding pediatric blink reflex development is crucial for assessing neurological maturation.
Purpose of the Study:
- To investigate the blink reflex characteristics in neurologically intact infants and children.
- To compare pediatric blink reflex findings with adult data.
- To explore the blink reflex as a potential indicator of central nervous system myelination in children.
Main Methods:
- Studied 12 neurologically intact infants and children (2 weeks to 3 years).
- Recorded orbicularis oculi muscle activity using coaxial needle electrodes.
- Elicited responses via supraorbital groove electrical stimulation (50-100V).
Main Results:
- R1 response present in all subjects with adult-like latency.
- Absence of contralateral R2 response was consistent.
- Ipsilateral R2 response observed in 50% of cases.
- Both R1 and R2 amplitudes were lower than in adults.
Conclusions:
- Pediatric blink reflex patterns differ significantly from adults.
- The blink reflex may serve as a valuable indicator of brain stem and cranial nerve pathway myelination in children.
- Further research can establish normative data for pediatric blink reflex parameters.
Abstract:
Blink reflex was studied in 12 neurologically intact infants and children aged 2 weeks to 3 years. A coaxial needle electrode inserted in the outer lower quadrant of the orbicularis oculi muscle was used for recording. Responses were elicited by a 50-100V current delivered through a stimulating electrode placed on the supraorbital groove. Absence of contralateral R2 response was a consistent finding. Ipsilateral R2 responses were elicited in 50% of the cases. R1 response was present in all instances and showed latency values similar to adults. The amplitudes of both R1 and R2 were lower than reported in adult population. The blink reflex may be an indication of the degree of myelination of the brain stem, facial and trigeminal pathways in children.