Age-related semiology changes over time.

Area of Science:

• Neurology
• Developmental Neuroscience
• Epileptology

Background:

• Epilepsy exhibits significant age-related changes in brain maturation and seizure presentation.
• Seizure recognition is particularly challenging in neonates due to brain immaturity.
• Understanding these developmental shifts is key for accurate diagnosis.

Purpose of the Study:

• To elucidate the evolving patterns of seizure semiology across different age groups.
• To establish correlations between age-specific seizure manifestations and the seizure onset zone.
• To improve the diagnostic accuracy of epilepsy in pediatric and adult populations.

Main Methods:

• Review of electroclinical seizure classifications (motor, non-motor, sequential, unclassified).
• Analysis of common seizure types observed in neonates, infants, preschool, and school-aged children.
• Comparison of seizure semiology across developmental stages and with adult presentations.

Main Results:

• Neonatal seizures are challenging to recognize, often focal, and present as motor, non-motor, or behavioral arrest types.
• Infantile seizures commonly include epileptic spasms, myoclonic, tonic, and atonic seizures.
• Preschoolers exhibit generalized myoclonic, tonic, and focal tonic/clonic seizures, with developing lateralizing motor signs; school-aged children show increased awareness changes and adult-like semiology.

Conclusions:

• Seizure semiology undergoes distinct transformations throughout brain development, from infancy to adulthood.
• Age-specific seizure patterns provide critical clues for localizing the seizure onset zone.
• Recognizing these developmental changes enhances the diagnostic precision of epilepsy across the lifespan.