Breaking points on a progressive ratio schedule reinforced by intravenous apomorphine increase daily following 6-hydroxydopamine lesions of the nucleus accumbensROBERTS, D. C. S.Pharmacology, biochemistry and behavior. 1989, Vol 32, Num 1, pp 43-47, issn 0091-3057Article

Self-administration of GBR 12909 on a fixed ratio and progressive ratio schedule in ratsROBERTS, D. C. S.Psychopharmacologia. 1993, Vol 111, Num 2, pp 202-206, issn 0033-3158Article

Neuroleptics block high- but not low-dose heroin place preferences : further evidence for a two-system model of motivationNADER, K; BECHARA, A; ROBERTS, D. C. S et al.Behavioral neuroscience. 1994, Vol 108, Num 6, pp 1128-1138, issn 0735-7044Article

3,4-methylenedioxyamphetamine (MDA) self-administration and neurotoxicityMARKERT, L. E; ROBERTS, D. C. S.Pharmacology, biochemistry and behavior. 1991, Vol 39, Num 3, pp 569-574, issn 0091-3057Article

Fluoxetine pretreatment reduces breaking point on a progressive ratio schedule reinforced by intravenous cocaine self-administration in the ratRICHARDSON, N. R; ROBERTS, D. C. S.Life sciences (1973). 1991, Vol 49, Num 11, pp 833-840, issn 0024-3205Article

Effects of amphetamine and apomorphine on locomotor activity after 6-OHDA and electrolytic lesions of the nucleus accumbens septiKELLY, P. H; ROBERTS, D. C. S.Pharmacology, biochemistry and behavior. 1983, Vol 19, Num 1, pp 137-143, issn 0091-3057Article

Effects of cocaine self-administration on food-reinforced responding using a discrete trial procedure in ratsLYNCH, W. J; ROBERTS, D. C. S.Neuropsychopharmacology (New York, NY). 2004, Vol 29, Num 4, pp 669-675, issn 0893-133X, 7 p.Article

Cocaine-responsive gene expression changes in rat hippocampusFREEMAN, W. M; BREBNER, K; LYNCH, W. J et al.Neuroscience. 2001, Vol 108, Num 3, pp 371-380, issn 0306-4522Article

Self-administration of cocaine analogs by ratsROBERTS, D. C. S; PHELAN, R; HODGES, L. M et al.Psychopharmacologia. 1999, Vol 144, Num 4, pp 389-397, issn 0033-3158Article

A critique of fixed and progressive ratio schedules used to examine the neural substrates of drug reinforcement : Current issues in psychostimulant abuse researchARNOLD, J. M; ROBERTS, D. C. S.Pharmacology, biochemistry and behavior. 1997, Vol 57, Num 3, pp 441-447, issn 0091-3057Conference Paper

Periodic acid-Schiff(PAS)-positive deposits in brain following kainic acid-induced seizures : relationships of fos induction, neuronal necrosis, reactive gliosis, and blood-brain barrier breakdownBENNETT, S. A. L; STEVENSON, B; STAINES, W. A et al.Acta neuropathologica. 1995, Vol 89, Num 2, pp 126-138, issn 0001-6322Article

Evaluation of response perseveration of rats in the radial arm maze following reinforcing and nonreinforcing drugsLOH, E. A; SMITH, A. M; ROBERTS, D. C. S et al.Pharmacology, biochemistry and behavior. 1993, Vol 44, Num 3, pp 735-740, issn 0091-3057Article

The effects of dose and access restrictions on the periodicity of cocaine self-administration in the ratFITCH, T. E; ROBERTS, D. C. S.Drug and alcohol dependence. 1993, Vol 33, Num 2, pp 119-128, issn 0376-8716Article

Break-points on a progressive ratio schedule reinforced by intravenous cocaine increase following depletion of forebrain serotoninLOH, E. A; ROBERTS, D. C. S.Psychopharmacology. 1990, Vol 101, Num 2, pp 262-266, issn 0142-8411, 5 p.Article

Adrenal demedullation blocks and brain norepinephrine depletion potentiates the hyperglycemic response to a variety of stressorsBIALIK, R. J; SMYTHE, J. W; SARDELIS, M et al.Brain research. 1989, Vol 502, Num 1, pp 88-98, issn 0006-8993Article

Alpha2-adrenergic receptors mediate the increase in blood glucose levels induced by epinephrine and brief footshock stressBIALIK, R. J; SMYTHE, J. W; ROBERTS, D. C. S et al.Progress in neuro-psychopharmacology & biological psychiatry. 1988, Vol 12, Num 2-3, pp 307-314, issn 0278-5846Conference Paper

The effect of haloperidol on cocaine self-administration is augmented with repeated administrationsROBERTS, D. C. S; VICKERS, G.Psychopharmacologia. 1987, Vol 93, Num 4, pp 526-528, issn 0033-3158Article

Neonatal 6-hydroxydopamine prevents adaptation to chemical disruption of the pituitary-adrenal system in the ratBIALIK, B. J; PAPPAS, B. A; ROBERTS, D. C. S et al.Hormones and behavior (Print). 1984, Vol 18, Num 1, pp 12-21, issn 0018-506XArticle

Individual differences in sucrose consumption in the rat : motivational and neurochemical correlates of hedoniaBRENNAN, K; ROBERTS, D. C. S; ANISMAN, H et al.Psychopharmacologia. 2001, Vol 157, Num 3, pp 269-276, issn 0033-3158Article

Effect of 6-hydroxydopamine lesions of the medial prefrontal cortex on intravenous cocaine self-administration under a progressive ratio schedule of reinforcementMCGREGOR, A; BAKER, G; ROBERTS, D. C. S et al.Pharmacology, biochemistry and behavior. 1996, Vol 53, Num 1, pp 5-9, issn 0091-3057Article

Initiation, maintenance and extinction of cocaine self-administration with and without conditioned rewardRANALDI, R; ROBERTS, D. C. S.Psychopharmacologia. 1996, Vol 128, Num 1, pp 89-96, issn 0033-3158Article

Systemic pretreatment with MK-801 (dizocilpine) increases breaking points for self-administration of cocaine on a progressive-ratio schedule in ratsRANALDI, R; FRENCH, E; ROBERTS, D. C. S et al.Psychopharmacologia. 1996, Vol 128, Num 1, pp 83-88, issn 0033-3158Article

Effect of dopaminergic drugs on cocaine reinforcement. DiscussionROBERTS, D. C. S; RANALDI, R; WILLNER et al.Clinical neuropharmacology. 1995, Vol 18, pp S84-S95, issn 0362-5664, SUP1Conference Paper

Effect of 6-hydroxydopamine lesions of the amygdala on intravenous cocaine self-administration under a progressive ratio schedule of reinforcementMCGREGOR, A; BAKER, G; ROBERTS, D. C. S et al.Brain research. 1994, Vol 646, Num 2, pp 273-278, issn 0006-8993Article

Heroin self-administration in rats under a progressive ratio schedule of reinforcementROBERTS, D. C. S; BENNETT, S. A. L.Psychopharmacologia. 1993, Vol 111, Num 2, pp 215-218, issn 0033-3158Article