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Decreased voluntary ethanol selection in amygdala-kindled rats
M A Linseman1, G Cottrell, W M Burnham
1Biobehavioral Research Department, Addiction Research Foundation, Toronto, Ontario, Canada.
Pharmacology, Biochemistry, and Behavior
|May 1, 1994
Summary
Kindled rats, despite increased voluntary ethanol access, consumed less ethanol than control rats. This finding suggests a complex interaction between kindling, ethanol intake, and seizure activity.
Area of Science:
- Neuroscience
- Pharmacology
- Behavioral Science
Background:
- Epilepsy, a neurological disorder, is characterized by recurrent seizures.
- Ethanol (alcohol) consumption is a common behavior with complex interactions with neurological conditions.
- Kindling is an animal model used to study epilepsy and the effects of repeated stimuli, such as seizures.
Purpose of the Study:
- To investigate the effect of kindling on voluntary ethanol consumption in rats.
- To determine if seizure-induced changes in rats influence their preference for ethanol.
Main Methods:
- Rats were subjected to a kindling protocol to induce epilepsy.
- Kindled and control rats were given limited daily access (1 hour) to ethanol or dextrose solutions.
- Ethanol intake was measured at two time points after the final seizure: 24 hours and 30 days.
Main Results:
- Kindled rats showed significantly lower voluntary ethanol intake compared to control rats.
- This reduced ethanol consumption in kindled rats was observed at both 24 hours and 30 days post-seizure.
- No significant difference in dextrose solution intake was found between kindled and control rats.
Conclusions:
- Kindling appears to reduce, rather than increase, voluntary ethanol consumption in rats.
- The observed effect on ethanol intake persists even after a 30-day period following the last seizure.
- These findings highlight a potential neurobiological link between seizure susceptibility and ethanol reward pathways.