| EEG of chronic marijuana users during abstinence: relationship to years of marijuana use, cerebral blood flow and thyroid function. | |
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MedLine Citation:
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PMID: 18065267 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: Marijuana abuse is associated with neurological changes including increases in frontal EEG alpha during abstinence. Research is needed to assess to what extent these EEG patterns are indicative of cerebral perfusion deficits. METHODS: We recorded the resting eyes closed EEG of 75 abstinent marijuana users and 33 control subjects. Fifty-six marijuana users used marijuana for less than eight years and 19 used for eight years or more. The EEG evaluation occurred within 72h of admission to an inpatient unit. Fifty-nine marijuana users remained abstinent for a month and were tested twice. Supplemental psychological and physiological data were also collected. RESULTS: Log alpha2 and beta2 power at posterior sites were significantly lower for the marijuana abusers that used eight years or more than the other marijuana abusers and the control subjects. These EEG changes continued for the month of abstinence. The marijuana users who used marijuana for more than eight years, also, had lower heart rates and thyroid function (T4) compared to the other marijuana users and the control subjects. CONCLUSIONS: Chronic marijuana use was also associated with reduced EEG power in alpha and beta bands at posterior sites. These reductions in EEG power appear to be related to cerebral perfusion deficits and/or thyroid function in marijuana abusers. SIGNIFICANCE: Our results suggest EEG, cerebral blood flow velocity, cardiovascular and thyroid function alterations in marijuana abuser with an extended period of use. These alterations reflect under arousal in these systems. |
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Authors:
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Ronald I Herning; Warren Better; Jean L Cadet |
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Publication Detail:
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Type: Journal Article Date: 2007-12-11 |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: 119 ISSN: 1388-2457 ISO Abbreviation: Clin Neurophysiol Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2007-12-24 Completed Date: 2008-04-11 Revised Date: 2012-03-07 |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 321-31 Citation Subset: IM |
Affiliation:
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Molecular Neuropsychiatry Section, National Institute on Drug Abuse, Intramural Research Program, National Institutes of Health, 5500 Nathan Shock Drive, Baltimore, MD 21224, USA. rherning@intra.nida.nih.gov |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Alpha Rhythm* Blood Flow Velocity / drug effects Brain Mapping* Cerebrovascular Circulation / drug effects, physiology* Female Heart Rate / drug effects, physiology Humans Male Marijuana Smoking / physiopathology* Spectrum Analysis Substance Withdrawal Syndrome / physiopathology* Thyroid Gland / drug effects, physiopathology* Time Factors Ultrasonography, Doppler, Duplex |
| Grant Support | |
ID/Acronym/Agency:
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Z99 DA999999/DA/NIDA NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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