Patterns of functional activity associated with cocaine self-administration in the rat change over time.

Rationale: Although imaging studies in human addicts have been valuable for identifying the neural substrates of the effects of abused drugs, few studies have used this approach in animal models where conditions can be carefully controlled.

Objective: To define the substrates that mediate the effects of cocaine in a rodent model of cocaine self-administration using the 2-[(14)C]deoxyglucose method and to assess changes in these patterns over the course of drug exposure.

Methods: Male Sprague-Dawley rats self-administered cocaine (0.

Functional consequences of the repeated administration of Delta9-tetrahydrocannabinol in the rat.

The repeated administration of Delta(9)-tetrahydrocannabinol (THC) results in tolerance to many of its behavioral and physiological effects. It also produces changes in the functionality of cannabinoid receptors. What is not completely understood is how these cellular events translate into the behavioral and physiological changes that are associated with repeated cannabinoid agonist treatment.

Functional consequences of the acute administration of the cannabinoid receptor antagonist, SR141716A, in cannabinoid-naive and -tolerant animals: a quantitative 2-[14C]deoxyglucose study.

Cannabinoid systems have been shown to be involved in the regulation of ingestive behaviors. Administration of the cannabinoid antagonist, SR141716A, markedly reduces intake of sucrose solutions, food pellets, and ethanol. The purpose of the present studies was to identify the neural substrates that mediate these actions in rats using the quantitative autoradiographic 2-[14C]deoxyglucose (2-DG) method.

Dose-dependent effects of Delta9-tetrahydrocannabinol on rates of local cerebral glucose utilization in rat.

Recent reports have demonstrated that Delta(9)-tetrahydrocannabinol (Delta(9)-THC) stimulates locomotor activity at low doses (<2.5 mg/kg), while higher doses (>2.5 mg/kg) produce decreases in spontaneous activity.

Metabolic mapping of the time-dependent effects of delta 9-tetrahydrocannabinol administration in the rat.

Rationale: Delta(9)-Tetrahydrocannabinol (THC) has a long duration of action. Studies have shown that effects on some behavioral endpoints can persist for as long as 24 h after exposure, but the neural substrates underlying these long-lasting effects have not yet been determined.

Objectives: The purpose of the present study was to identify the neuroanatomical substrates associated with the temporal course of the effects of the acute administration of moderate to high doses of THC using the quantitative autoradiographic 2-[(14)C]deoxyglucose (2DG) method.