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Visual evoked potentials to flash as an indicator of brain dysfunction following concussive head injuries in children
Insights
Visual evoked potential to flash examination (VECP) effectively detects concussive head injuries in children. Pathological VECP results correlated with injury severity, showing transient changes in mild cases and persistent changes in severe head trauma.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Ophthalmology
Background:
- Concussive head injuries in children require accurate diagnostic tools.
- Visual evoked potential to flash examination (VECP) assesses visual pathway function.
Purpose of the Study:
- To evaluate the utility of VECP in diagnosing concussive head injuries in pediatric patients.
- To correlate VECP findings with the severity of head trauma.
Main Methods:
- Sixty-six children with concussive head injuries underwent VECP testing.
- VECP assessed occipital potential differences between hemispheres and/or eyes.
- Injury severity was graded using the Lange-Cosack and Tepfer scale (I-VI).
Main Results:
- VECP was pathological in 23 out of 66 children.
- A strong correlation was observed between increasing head injury grade and pathological VECP findings.
- VECP changes were transient in mild injuries (grades I-II) and persistent in severe injuries (grades III-VI).
Conclusions:
- VECP is a sensitive method for detecting visual pathway disturbances following concussive head injuries in children.
- VECP findings correlate with the severity of head trauma.
- VECP results showed good agreement with EEG findings in two-thirds of cases, but discrepancies occurred in one-third.
Abstract:
Sixty-six randomly selected children with concussive head injuries of different degrees were subjected to visual evoked potential to flash examination (VECP). Evaluating only the differences in occipital potential between both hemispheres and/or both eyes, the VECP was pathological in 23 cases. Estimating the severity of the head injuries, according to the proposal of Lange-Cosack and Tepfer (grades I-VI), gave rise to a close correlation between the incidence of pathological VECP and increasing degree of trauma. VECP changes were usually transitory in nature with slight injuries (I and II) and constant in traumata of higher degrees (III-VI). As to the agreement of VECP and EEG findings, in two-thirds of the cases, the results of both methods coincided with respect to the indication of "pathological" or "nonpathological". In one-third the methods gave different results.