An important aspect of motivated behavior is that organisms will perform complex
instrumental behaviors to gain access to stimuli such as food. In the present study, food …

Rationale: Dopamine is important for enabling organisms to overcome work-related
response costs. One way of investigating this function has been with concurrent choice …

This experiment was undertaken to provide a pharmacological characterization of
performance on a task involving food-related instrumental and consummatory behavior …

The dopamine antagonist haloperidol (HP) decreased motor activity that was induced by
periodic presentation of food to food-deprived rats, with the higher doses leading to a …

This experiment was undertaken to investigate dopaminergic involvement in food-related
instrumental behavior. Rats were tested in an operant chamber in which there was a choice …

This experiment was undertaken to investigate the role of nucleus accumbens dopamine
(DA) in instrumental and consummatory responses for food. In vivo microdialysis methods …

Rats were tested on days 1, 3, and 5 of a 5-day test week in an operant chamber in which
they could either lever press on a fixed-ratio 5 (FR5) schedule to obtain food pellets …

Three experiments investigated the behavioral effects of injections of the neurotoxic agent 6-
hydroxydopamine (6-OHDA) into the core or shell of the nucleus accumbens. In the first …

Rats were tested using a lever pressing/feeding procedure in which a preferred food
(Bioserve pellets) was available by pressing a lever on a fixed ratio 5 schedule, but a less …

Rationale Previous work has shown that stimulation of GABAergic, opioid, or dopaminergic
systems within the nucleus accumbens modulates food intake and food-seeking behavior …