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Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
Published on: November 19, 2012
The neurophysiological aspects of electrical injuries
H Hooshmand1, F Radfar, E Beckner
1Neurological Associates, Seizure Control Clinic, Vero Beach, Florida 32961.
Clinical EEG (Electroencephalography)
|April 1, 1989
Summary
Alternate current electrical injuries can cause generalized brain dysfunction, leading to depression and atypical seizures. Specialized evoked potential tests may be needed for diagnosis when standard EEG and CT scans are inconclusive.
Area of Science:
- Neurology
- Psychology
- Neurophysiology
Background:
- Alternate current (AC) electrical injuries are known to cause significant neurological and psychological sequelae.
- Long-term effects of AC electrical injuries on cognitive and emotional function require further investigation.
Purpose of the Study:
- To investigate the long-term neurologic and psychologic effects of AC electrical injuries.
- To identify potential diagnostic markers for cerebral dysfunction following electrical trauma.
Main Methods:
- Longitudinal study of 16 AC electrical injury victims over 5 years.
- Neurologic and psychologic assessments, including electroencephalography (EEG), computed tomography (CT), and evoked potentials.
- Analysis of seizure types and correlation with injury severity and diagnostic findings.
Main Results:
- A stereotyped generalized cerebral dysfunction was observed in patients.
- High incidence of depression, unemployment, divorce, and atypical seizures (atonic, myoclonic) noted.
- EEG and CT studies were nondiagnostic; evoked potentials showed abnormalities in the upper cervical spinal cord and lower brain stem.
Conclusions:
- AC electrical injuries can lead to profound and lasting cerebral dysfunction with specific seizure patterns.
- Deep-seated epileptogenic foci may be responsible for seizures, undetectable by standard EEG/CT.
- Accurate diagnosis and management of these patients may be hindered by non-diagnostic standard imaging and EEG, necessitating advanced neurophysiologic testing.
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