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Laboratory note. EEG changes after acute cerebral embolism
Electroencephalography and Clinical Neurophysiology
|April 1, 1976
Abstract:
Embolism of the right middle cerebral artery regularly failed to induce clinical or electrical seizure activity during acute ischemia in primates. This negative correlation casts some doubt on the popular interpretation of seizures at the outset of clinical stroke as evidence of cerebral embolism.
Insights
Cerebral embolism, specifically in the middle cerebral artery, did not typically cause seizures in primates during acute ischemia. This finding questions the common belief that seizures at stroke onset indicate cerebral embolism.
Area of Science:
- Neurology
- Neuroscience
- Cerebrovascular Diseases
Background:
- Seizures are sometimes observed in patients experiencing acute stroke.
- The occurrence of seizures at stroke onset is often interpreted as a sign of cerebral embolism.
Purpose of the Study:
- To investigate the relationship between middle cerebral artery embolism and seizure activity during acute ischemia.
- To evaluate the validity of interpreting seizures as direct evidence of cerebral embolism in acute stroke.
Main Methods:
- Induction of embolism in the right middle cerebral artery in primate models.
- Monitoring for clinical and electrical seizure activity during the acute ischemic phase.
Main Results:
- Embolism of the right middle cerebral artery consistently failed to induce clinical or electrical seizure activity.
- A negative correlation was observed between middle cerebral artery embolism and seizure occurrence.
Conclusions:
- The study casts doubt on the direct causal link between cerebral embolism and seizures at stroke onset.
- Clinical or electrical seizure activity may not be a reliable indicator of cerebral embolism in acute ischemic stroke.