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Related Experiment Videos

Rett syndrome: EEG presentation.

R Robertson1, L Langill, P K Wong

  • 1Department of Diagnostic Neurophysiology, British Columbia's Children's Hospital, Vancouver, Canada.

Electroencephalography and Clinical Neurophysiology
|November 1, 1988
PubMed
Summary
This summary is machine-generated.

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Electroencephalograms (EEGs) in girls with Rett syndrome show progressive deterioration, often lagging behind clinical symptoms. Central spikes, potentially linked to hand-waving mannerisms, were also frequently observed.

Area of Science:

  • Neurology
  • Neurophysiology
  • Developmental Disorders

Background:

  • Rett syndrome is a degenerative neurological disorder primarily affecting girls.
  • Classical presentation and electroencephalogram (EEG) findings are typical.
  • Longitudinal EEG data is crucial for understanding disease progression.

Purpose of the Study:

  • To analyze the progression of EEG abnormalities in Rett syndrome.
  • To correlate EEG findings with clinical staging.
  • To investigate the significance of central spikes and their relation to behavioral mannerisms.

Main Methods:

  • Longitudinal electroencephalogram (EEG) analysis of 7 girls with Rett syndrome.
  • Correlation of EEG findings with the Hagberg and Witt-Engerström Clinical Staging System.

Related Experiment Videos

  • Observation and documentation of background rhythms, sleep patterns, and specific EEG abnormalities like central spikes.

    • Main Results:

    • Progressive deterioration of background rhythms in both waking and sleep states was observed.
    • EEG abnormalities became evident at 4-5 years or during Stage 2 (Rapid Destructive Stage).
    • Central spikes were a frequent finding (5/7 girls), appearing age-related and potentially evoked by tactile stimulation.

    Conclusions:

    • EEG changes in Rett syndrome typically lag behind clinical symptoms by 1-3 years.
    • The marked contrast between waking and sleep EEG patterns may emerge later in the disease course.
    • Central spikes may be self-induced by repetitive movements, such as hand-wringing, suggesting a link between motor mannerisms and epileptiform discharges.