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[The EEG during the hemiplegic migraine attack of children]
Insights
Electroencephalogram (EEG) findings in pediatric hemiplegic migraine attacks reveal characteristic severe, focal brain disturbances. These EEG abnormalities, often unilateral, typically resolve within days, aiding in understanding this rare migraine type.
Area of Science:
- Neurology
- Pediatric Neurology
- Clinical Neurophysiology
Background:
- Hemiplegic migraine is a rare subtype of migraine with aura, characterized by temporary neurological deficits, including hemiplegia.
- Electroencephalography (EEG) is a key diagnostic tool for evaluating brain activity and identifying abnormalities during neurological events.
Observation:
- This study reports on EEG findings during 10 hemiplegic migraine attacks in 6 children.
- Clinical symptoms were observed alongside EEG recordings to correlate neurological events with brain activity.
Findings:
- EEG findings characteristically showed severe unilateral or focal disturbances, including delta, theta-delta, theta, or alpha-reduction activity.
- Diffuse slowing of background activity was observed in most cases, often alongside focal changes, with no hemispheric predominance.
- Focal abnormalities were not localized to specific brain regions and generally resolved within days, though one case showed persistent focal depression.
Implications:
- EEG provides valuable insights into the neurophysiological underpinnings of pediatric hemiplegic migraine.
- Understanding these EEG patterns can aid in the diagnosis and management of hemiplegic migraine in children.
- The transient nature of most EEG changes highlights the dynamic cerebral dysfunction during migraine attacks.
Abstract:
Following the exemplification of the clinical symptoms the EEG findings of 10 attacks of hemiplegic migraine in 6 children are reported on. Characteristically most of these are severe unilateral or focal disturbances. Five times these appeared as delta-activity, two times as theta-delta-activity, and in one case as theta-activity or alpha-reduction. Only once, a diffuse slowing of the background-activity over both hemispheres could be shown. With one exception in addition to the foci simultaneous diffuse changes were recorded in all children, (four times slight, twice slight to moderate and three times moderate to severe). A predominance of one hemisphere was not recognizable. The foci were not localized to one particular region of the brain. Most of the changes had subsided after a few days. In one case a slight focal voltage depression was apparent even after three month of a year.