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Temporal minor slow and sharp EEG activity and cerebrovascular disorder
G Asokan1, J Pareja, E Niedermeyer
1Department of Neurology, Johns Hopkins University School of Medicine, Maryland 21205.
Clinical EEG (Electroencephalography)
|October 1, 1987
Summary
Temporal minor slow and sharp activity (TMSSA) is a mild EEG abnormality, often left-sided, observed during drowsiness. This pattern may indicate underlying issues like hippocampal ischemia or vertebrobasilar insufficiency.
Area of Science:
- Clinical Neurophysiology
- Neurology
Background:
- Temporal minor slow and sharp activity (TMSSA) is an EEG pattern with unclear origins.
- This pattern is characterized by mixed slow and sharp wave activity in the temporal regions, predominantly on the left.
Purpose of the Study:
- To discuss the clinical significance of TMSSA.
- To explore potential underlying causes and implications of TMSSA.
Main Methods:
- Review of earlier literature.
- Analysis of personal observations from 209 patients and 227 EEG records.
Main Results:
- TMSSA is most prominent during early drowsiness and can evolve into
- wicket spikes
- in light NREM sleep.
- The pattern was predominantly observed on the left side in 84% of cases.
- Potential links to hippocampal ischemia and vertebrobasilar artery insufficiency were considered.
Conclusions:
- TMSSA represents a mild EEG abnormality.
- This pattern may have considerable clinical significance, potentially indicating underlying cerebrovascular compromise.