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Neural sensitization and physiological markers in multiple chemical sensitivity
I R Bell1, G E Schwartz, C M Baldwin
1Department of Psychiatry, University of Arizona, Tucson 85721, USA.
Regulatory Toxicology and Pharmacology : RTP
|August 1, 1996
Summary
Multiple Chemical Sensitivity (MCS) may stem from neural sensitization, a process where the brain becomes more reactive over time to chemical and stress exposures. This model explains symptoms and guides future research on chemical intolerance.
Area of Science:
- Neuroscience
- Environmental Health
- Psychiatry
Background:
- Multiple Chemical Sensitivity (MCS) is a chronic, polysymptomatic condition lacking clear diagnostic markers.
- Previous research often failed to account for non-immunological sensitization mechanisms in MCS.
- Time-dependent sensitization (TDS) offers a potential framework for understanding MCS, involving progressive responses to stimuli over time.
Purpose of the Study:
- To summarize the olfactory-limbic, neural sensitization model for MCS.
- To present laboratory data from chemically intolerant individuals using various physiological and psychological measures.
- To highlight the importance of TDS in understanding MCS pathophysiology.
Main Methods:
- Quantitative electroencephalography (qEEG)
- Polysomnography (sleep studies)
- Neuropsychological testing
- Cardiovascular measurements
- Blood marker analysis
Main Results:
- Data from chemically intolerant subjects are presented within the neural sensitization framework.
- The model suggests limbic and mesolimbic regions are highly sensitizable to environmental stimuli.
- Time-dependent sensitization (TDS) explains increased reactivity after repeated exposures, with females sensitizing more readily.
Conclusions:
- The olfactory-limbic, neural sensitization model provides a framework for understanding MCS.
- Distinguishing true chemical intolerance from phobia is crucial for future research.
- This model has implications for interpreting sensitivity test results in MCS.
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