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Periodic lateralized epileptiform discharges in infants and children
Insights
Periodic lateralized epileptiform discharges (PLEDs) in children, like adults, indicate severe brain dysfunction. However, in children, PLEDs often present with chronic, diffuse brain lesions and minimal consciousness changes.
Area of Science:
- Pediatric Neurology
- Clinical Neurophysiology
- Epileptology
Background:
- Periodic lateralized epileptiform discharges (PLEDs) are recognized EEG patterns.
- PLEDs are typically associated with severe brain dysfunction in adults, often linked to acute lesions and altered consciousness.
Purpose of the Study:
- To characterize PLEDs in infants and children.
- To compare PLEDs in pediatric patients with those in adults.
Main Methods:
- Review of clinical and electroencephalographic (EEG) data.
- Analysis of waveform, periodicity, and transient nature of PLEDs.
Main Results:
- Seven pediatric cases with PLEDs were analyzed.
- Pediatric PLEDs shared waveform, periodicity, and transient characteristics with adult PLEDs.
- Unlike adults, pediatric PLEDs were frequently associated with chronic, diffuse central nervous system lesions and minimal consciousness alteration.
Conclusions:
- PLEDs in children signify severe underlying brain dysfunction, similar to adults.
- Pediatric PLEDs may present differently than adult PLEDs, often linked to chronic, diffuse lesions rather than acute unilateral ones.
- Further research is needed to understand the specific implications of PLEDs in pediatric neurological disorders.
Abstract:
Clinical and electroencephalographic data on 7 infants and children with periodic lateralized epileptiform discharges (PLEDS) in their electroencephalograms were reviewed. The waveform, periodicity, and transitory nature of these discharges were similar to those reported in adults. In children, as in adults, PLEDs reflect severe underlying brain dysfunction which is often associated with metabolic and structural abnormalities. In adults, PLEDs are usually associated with altered states of consciousness and with acute unilateral cerebral lesions; in children, however, they often occur with little or no alteration in consciousness and with chronic, diffuse lesions of the central nervous system.