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A Behavioral Test Battery for the Repeated Assessment of Motor Skills, Mood, and Cognition in Mice
Published on: March 2, 2019
Effects of nitrous oxide exposure on behavioral changes in mice
Y K Fung1, M R Brown, R E Sullivan
1Department of Pediatric Dentistry, College of Dentistry, University of Nebraska Medical Center.
Pediatric Dentistry
|March 1, 1993
Summary
Exposure to low levels of nitrous oxide (N2O) in mice did not significantly affect motor coordination or anxiety. However, it did reduce stereotypic behavior and locomotor activity, suggesting potential alterations in dopaminergic activity.
Area of Science:
- Neuroscience
- Toxicology
Background:
- Nitrous oxide (N2O) is widely used in medical and dental settings.
- Understanding the neurological effects of low-level, chronic N2O exposure is crucial.
Purpose of the Study:
- To investigate the impact of continuous low-level nitrous oxide exposure on mouse behavior and occipital cortex cellularity.
- To assess potential neurotoxic effects relevant to occupational or environmental exposure.
Main Methods:
- Mice were exposed to air or 1000/2000 ppm N2O for 8 hours/day over 8 days.
- Behavioral tests included motor coordination, locomotor activity, stereotypic behavior, and anxiety.
- Occipital cortex histology examined neural and neuroglial cell counts.
Main Results:
- No significant deficits in motor coordination or anxiety levels were observed.
- Locomotor activity showed a non-significant decrease in N2O-exposed mice.
- A dose-dependent reduction in stereotypic behavior was noted with N2O exposure.
- Histological analysis revealed no significant changes in neural or glial cell populations.
Conclusions:
- Short-term, low-level nitrous oxide exposure may influence central dopaminergic pathways.
- Further research is needed to clarify the long-term neurological consequences of repeated N2O exposure.
