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An Assay for Measuring the Effects of Ethanol on the Locomotion Speed of Caenorhabditis elegans
Published on: April 9, 2015
Rotation, locomotor activity and individual differences in voluntary ethanol consumption
D M Nielsen1, K J Crosley, R W Keller
1Department of Pharmacology and Neuroscience, A136, Albany Medical College, 47 New Scotland Avenue, Albany, NY 12208, USA.
Brain Research
|March 30, 1999
Summary
Spontaneous turning behavior and locomotor activity in rats predict ethanol consumption. Low-activity right-turning rats showed the highest voluntary ethanol intake, suggesting dopamine pathway involvement.
Area of Science:
- Neuroscience
- Behavioral Neuroscience
- Neuropharmacology
Background:
- Individual differences in behavior can predict substance use vulnerability.
- Dopamine (DA) pathways in the brain are implicated in motivated behaviors, including substance consumption.
Purpose of the Study:
- To investigate if spontaneous turning behavior and locomotor activity predict voluntary ethanol consumption in rats.
- To explore the relationship between these behavioral measures and brain dopamine function.
Main Methods:
- Male Long-Evans rats were assessed for turning preference (left vs. right) and locomotor activity levels using a rotometer.
- Ethanol preference was measured using a 24-hour two-bottle choice paradigm (10% ethanol vs. water).
Main Results:
- Rats with a right-turning preference consumed more ethanol than left-turning rats.
- Locomotor activity alone did not predict ethanol intake, but combined with turning behavior, it did.
- Low-activity right-turning rats exhibited the highest ethanol consumption compared to all other groups.
Conclusions:
- Turning behavior and locomotor activity together are significant predictors of voluntary ethanol consumption.
- These behavioral differences may be linked to asymmetries in medial prefrontal cortex (mPFC) and nucleus accumbens (NAS) dopamine function, suggesting a neurobiological basis for individual differences in ethanol intake.
