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Identical morphology of the rolandic spike-and-wave complex in different clinical entities
W van der Meij1, G H Wieneke, A C van Huffelen
1Department of Clinical Neurophysiology, University Hospital Utrecht, The Netherlands.
Insights
Rolandic spikes in children, often associated with benign focal epilepsy of childhood, are morphologically consistent across different clinical groups. Their waveform does not predict epilepsy or brain lesions, requiring further clinical data for diagnosis.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Clinical Electrophysiology
Background:
- Rolandic spikes are characteristic EEG findings in children, particularly in benign focal epilepsy of childhood with centrotemporal spikes (BECT).
- The clinical significance of rolandic spikes, including their association with epilepsy and organic cerebral lesions, remains a subject of investigation.
Purpose of the Study:
- To quantitatively analyze the morphology of rolandic spikes and associated waveforms in children with diverse clinical presentations.
- To determine if the morphology of rolandic spikes can predict epileptogenicity or the presence of cerebral lesions.
Main Methods:
- Quantitative morphological analysis of rolandic spike, inter-spike trough, and slow wave.
- Inclusion of 43 children across five clinical groups: BECT with oropharyngeal seizures, BECT with other seizures, functional without epilepsy, and organic with or without epilepsy.
Main Results:
- The morphology of the rolandic spike-and-wave complex was consistent across all five clinical groups studied.
- Rolandic spikes were characterized as sharp waves with a mean duration of 88 ms, not true spikes.
- Morphology did not correlate with epileptogenicity or the presence of organic cerebral lesions.
Conclusions:
- The quantitative morphology of rolandic spike-and-wave complexes is uniform across various pediatric clinical syndromes.
- Rolandic spike morphology alone is insufficient to determine epileptogenicity or diagnose cerebral lesions.
- Clinical context, background EEG activity, and neuroimaging (CT/MRI) are crucial for interpreting the significance of rolandic spikes in children.
Abstract:
The morphology of the rolandic spike, the trough between the rolandic spike and the following slow wave, and of the slow wave itself was quantitatively studied in 43 children, classified into five clinical groups: (a) functional with epilepsy benign focal epilepsy of childhood with centrotemporal spikes (BECT) with oropharyngeal seizures or (b) BECT with unilateral or generalized seizures or (c) functional without epilepsy, and (d) organic with or (e) without epilepsy. The morphologic features of the rolandic spike-and-wave complex were identical in the five clinical categories. Thus, a quantitative description of the rolandic spike-and-wave complex can be given that is valid for the 43 children of the present study, although they represent a heterogeneity of associated clinical syndromes. The rolandic spike appeared to be not a spike but a sharp wave with a mean duration of 88 ms. In contrast to the opinion of several investigators, the morphology of the rolandic spike does not provide a clue to its "epileptogenicity" or to the presence or absence of an organic cerebral lesion in the individual child. In clinical practice, additional information (background activity of the EEG, computed tomography (CT) scan, or magnetic resonance imaging (MRI) of the brain) is needed to determine the significance of rolandic spikes occurring in the EEG of a child with respect to the probability of a cerebral lesion and the prognosis in relation to epileptic seizures.