Related Experiment Videos
Diazepam facilitates stimulation-induced feeding in rats
1School of Psychology, University of Ottawa, Ontario, Canada.
Pharmacology, Biochemistry, and Behavior
|June 1, 1994
Summary
Diazepam, a common sedative, was found to enhance stimulation-induced feeding (SIF) in rats. This drug facilitated SIF, even in brain areas where arousal competes with feeding behaviors.
Area of Science:
- Neuroscience
- Pharmacology
- Behavioral Science
Background:
- Stimulation-induced feeding (SIF) is a model for studying appetite regulation.
- The medial forebrain bundle (MFB) is a key neural pathway involved in reward and motivation, including feeding.
- Understanding how drugs affect SIF can provide insights into appetite control mechanisms.
Purpose of the Study:
- To investigate the effect of diazepam on the relationship between electrical stimulation current and frequency required to elicit feeding.
- To determine if diazepam can facilitate SIF in rats, particularly in brain sites where arousal interferes with feeding.
Main Methods:
- Five rats with electrodes in the MFB were used.
- Electrical stimulation parameters (current and frequency) were varied to assess the trade-off function for SIF.
- Diazepam was administered at doses of 2.5 mg/kg and 5.0 mg/kg to evaluate its effects on SIF thresholds.
Main Results:
- Diazepam facilitated SIF in all tested rats.
- SIF was observed at lower stimulation thresholds (10-25% frequency shift) in the presence of diazepam.
- The facilitatory effect of diazepam was consistent across different current levels in some trade-off functions.
Conclusions:
- Diazepam can enhance the expression of SIF.
- Diazepam may overcome competing arousal components at feeding sites, thereby promoting feeding behavior.
- These findings contribute to understanding the neuropharmacology of appetite and feeding regulation.