The Electroencephalogram in Cannabis Associated Psychosis
Canadian Psychiatric Association Journal April 1, 1971 DOI: 10.1177/070674377101600211 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Observational comparative study Peer reviewed |
|---|---|
| Sample size | 61 |
| Population | Patients with psychotic reactions after cannabis use, patients admitted with schizophrenia, patients seen for neurological consultation, and cannabis users without apparent psychiatric implications |
| Topics | Cannabis |
| Key findings | Cannabis users showed a greater increase in EEG abnormalities than patients with schizophrenia, neurological consultation patients, and cannabis users without psychiatric symptoms. The authors suggest cannabis may be a factor in creating the EEG abnormalities and in contributing to the psychotic reactions observed, especially when other causes of similar EEG abnormalities have been ruled out. |
Abstract
Comparison was made among the electroencephalograms of eleven patients with psychotic reactions after the use of cannabis, twenty-nine patients admitted with a diagnosis of schizophrenia, ten for neurological consultations and eleven cannabis users with no apparent psychiatric implications. It was found that there was a greater increase in the EEG abnormalities of cannabis users than in the rest. It is therefore suggested that the drug may be a factor in creating the EEG abnormalities as well as contributing to the psychotic reactions observed, especially when the other factors which could create similar EEG abnormalities have been ruled out.