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Triphasic waves in Alzheimer's disease.

A Primavera1, F Traverso

  • 1Institute of Clinical Neurology, University of Genova, Italy.

Acta Neurologica Belgica
|January 1, 1990
PubMed
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Triphasic waves on electroencephalograms (EEGs) are uncommon in Alzheimer's disease patients but correlate with increased dementia severity and myoclonus. These atypical EEG findings offer potential insights into disease progression.

Area of Science:

  • Neurology
  • Neurophysiology

Background:

  • Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
  • Electroencephalography (EEG) is used to assess brain activity.

Purpose of the Study:

  • To investigate the occurrence and characteristics of triphasic waves in patients diagnosed with Alzheimer's disease.
  • To determine the clinical significance of triphasic waves in AD.

Main Methods:

  • Retrospective review of clinical records and EEGs from 114 consecutive patients with a clinical diagnosis of AD.
  • Analysis of EEG findings, specifically the presence and characteristics of triphasic waves.
  • Comparison of clinical features between patients with and without triphasic waves.

Main Results:

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  • Triphasic waves were identified in 13% (15/114) of AD patients.
  • These triphasic waves were typically atypical (singular, short bursts, occipital predominance, asymmetrical).
  • Triphasic waves were associated with a higher degree of dementia (p<0.01) and increased frequency of myoclonus (p<0.01).

Conclusions:

  • Atypical triphasic waves are an infrequent EEG finding in Alzheimer's disease.
  • The presence of triphasic waves in AD is linked to more severe dementia and myoclonus.
  • EEG may provide additional markers for disease severity in Alzheimer's disease.