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EEG and evoked potentials in episodic-dyscontrol syndrome
M E Drake1, S A Hietter, A Pakalnis
1Department of Neurology, Ohio State University College of Medicine Clinical Neurophysiology Laboratory, Ohio State University Hospitals, Columbus 43210.
Neuropsychobiology
|January 11, 1992
Summary
Neurophysiologic studies reveal potential links between brain dysfunction and aggressive behavior. Electroencephalograms (EEGs) showed abnormalities in some patients with episodic dyscontrol syndrome, suggesting a connection to impulse control disorders.
Area of Science:
- Neuroscience
- Psychiatry
- Clinical Neurophysiology
Background:
- The neurophysiological underpinnings of explosive rage and violence remain poorly understood.
- Impulsive, aggressive, and violent behaviors are often associated with complex neurological and psychological factors.
Purpose of the Study:
- To investigate the neurophysiological correlates of episodic dyscontrol syndrome, characterized by impulsive and violent behavior.
- To examine electroencephalograms (EEGs) and auditory-evoked potentials (AEPs) in patients with aggressive behavior.
Main Methods:
- Recorded 17-channel EEGs, brainstem auditory-evoked potentials (BAEPs), and long-latency auditory-event-related potentials (AEPs) in 23 patients with episodic dyscontrol syndrome.
- Compared patient data with age-matched control groups including patients with headaches and depressed patients.
- Analyzed EEG abnormalities, BAEP latencies, and AEP amplitudes (N100, P160).
Main Results:
- Seven out of 23 patients with episodic dyscontrol syndrome exhibited abnormal EEGs (diffuse or focal slowing).
- EEG abnormalities were significantly more prevalent in patients compared to headache and depressed patient control groups.
- No significant differences were found in BAEP latencies between patients and controls.
- AEP amplitudes (N100, P160) were lower in patients, but this difference was not statistically significant.
Conclusions:
- Non-specific cerebral dysfunction and EEG changes may be associated with impaired impulse and behavior control.
- Episodic dyscontrol syndrome might be linked to other indicators of minimal brain dysfunction.
- Further research is needed to clarify the precise neurophysiological mechanisms underlying violent behavior.