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Brain hyperthermia as physiological and pathological phenomena
1Cellular Neurobiology Branch, National Institute on Drug Abuse-Intramural Research Program, National Institutes of Health, DHHS, 5500 Nathan Shock, Baltimore, MD 21224, USA. ekiyatki@intra.nida.nih.gov
Brain Research. Brain Research Reviews
|May 14, 2005
Summary
Brain temperature fluctuates significantly during normal activities, originating from neural metabolism and impacting brain function. Drug abuse can cause dangerous brain hyperthermia, increasing health risks.
Area of Science:
- Neuroscience
- Physiology
- Pharmacology
Background:
- Brain metabolism generates significant heat, yet brain temperature is traditionally viewed as stable.
- Recent findings reveal substantial, rapid brain temperature fluctuations during physiological and behavioral activities.
Purpose of the Study:
- To review evidence for physiological brain hyperthermia and its intra-brain origins.
- To explore how drugs of abuse induce brain hyperthermia and modulate its effects.
- To highlight the health risks associated with drug-induced hyperthermia.
Main Methods:
- Review of existing research on brain temperature dynamics.
- Analysis of data on physiological brain hyperthermia.
- Examination of drug-induced hyperthermia and its contributing factors.
Main Results:
- Physiological brain hyperthermia stems from increased neural metabolism and intra-brain heat production.
- Drugs of abuse can induce hyperthermia by increasing metabolic brain activation and impairing heat dissipation.
- Drug effects on temperature are modulated by activity, environment, and self-administration, with hyperthermia exacerbating toxicity.
Conclusions:
- Brain temperature is a dynamic parameter reflecting neural activity and influencing neural functions.
- Drug-induced brain hyperthermia poses significant health risks, including acute complications and chronic CNS damage.
- Monitoring brain temperature offers insights into drug effects and addiction development.