Risk-seeking for losses is associated with 5-HTTLPR, but not with transient changes in 5-HT levels.

abstract：:In a shuttle-box self-stimulation paradigm, analgesic doses of morphine increase the amount of time a rat leaves rewarding brain stimulation on, without altering average OFF times. This paradigm may serve as a model for the euphoria induced by narcotic drugs and as a useful tool for evaluating the reinforcing effects ...

journal_title：Psychopharmacology

authors： Levitt RA,Baltzer JH,Evers TM,Stilwell DJ,Furby JE

更新日期：1977-11-15 00:00:00

abstract：RATIONALE:Limited access nicotine self-administration decreases hippocampal neurogenesis, providing a mechanism for the deleterious effects of nicotine on hippocampal neuronal plasticity. However, recent studies have shown that limited access nicotine self-administration does not exhibit key features of nicotine depend...

journal_title：Psychopharmacology

authors： Cohen A,Soleiman MT,Talia R,Koob GF,George O,Mandyam CD

更新日期：2015-01-01 00:00:00

abstract：BACKGROUND:A history of brief intermittent social defeat stress can escalate cocaine self-administration and induce long-term adaptations in the mesolimbic dopamine system. Extra-hypothalamic corticotrophin releasing factor (CRF) has been shown to be closely associated with stress-induced escalation of drug use. How re...

journal_title：Psychopharmacology

authors： Han X,DeBold JF,Miczek KA

更新日期：2017-09-01 00:00:00

abstract：:In the present study a cross-familiarisation conditioned taste aversion (CTA) paradigm was utilized to reveal stimulus resemblance between the selective 5-HT1A agonist 8-OHDPAT and a variety of serotonergic and non-serotonergic drugs. In male mice, a 0.22 mg/kg dose of 8-OHDPAT was used as the reference compound induc...

journal_title：Psychopharmacology

authors： De Beun R,Rijk HW,Broekkamp CL

更新日期：1993-01-01 00:00:00

abstract：:A paradigm for assessing benzodiazepine receptor sensitivity was developed using intravenous midazolam in normal volunteers. After administration of incremental doses of midazolam, alterations in saccadic eye movement parameters and psychological self ratings were assessed. Significant changes included dose-dependent ...

journal_title：Psychopharmacology

authors： Ball DM,Glue P,Wilson S,Nutt DJ

更新日期：1991-01-01 00:00:00

abstract：BACKGROUND AND RATIONALE:More than two decades ago, Wise proposed his "anhedonia hypothesis" to explain the role of dopamine in motivated behaviors. The hypothesis posits that dopamine mediates the pleasure experienced by reward obtainment. However, some experimental findings have contested this hypothesis and several ...

journal_title：Psychopharmacology

authors： Barbano MF,Cador M

更新日期：2007-04-01 00:00:00

abstract：RATIONALE:Evidence suggesting that the endogenous cannabinoid (eCB) system can be manipulated to facilitate or impair extinction of learned behaviours has important consequences for opiate withdrawal and abstinence. We demonstrated that the fatty acid amide hydrolase (FAAH) inhibitor URB597, which increases eCB levels,...

journal_title：Psychopharmacology

authors： Manwell LA,Mallet PE

更新日期：2015-05-01 00:00:00

abstract：RATIONALE:Emerging evidence from agonist-antagonist studies suggests a role for the dopamine D(3) receptor subtype in the regulation of PPI in animals, but such evidence is lacking for human subjects. OBJECTIVES:This study examines the effect of the preferential D(3) agonist ropinirole on PPI in humans. METHODS:PPI w...

journal_title：Psychopharmacology

authors： Giakoumaki SG,Roussos P,Frangou S,Bitsios P

更新日期：2007-10-01 00:00:00

abstract：:5-Hydroxytryptamine1A (5-HT1A) receptors have been shown to be suppressed by corticosteroid hormones in a variety of animal experimental paradigms. It has been suggested that this effect may be central to the pathophysiology of severe clinical depressive illness, a condition in which 5-HT1A receptor function is reduce...

journal_title：Psychopharmacology

authors： Porter RJ,McAllister-Williams RH,Lunn BS,Young AH

更新日期：1998-10-01 00:00:00

abstract：RATIONALE:Selective attention deficit, characterised by the inability to differentiate relevant from irrelevant information, is considered to underlie many cognitive deficits of schizophrenia, and appears to be only marginally responsive to treatment with current antipsychotics. OBJECTIVES:We compared the activity of ...

journal_title：Psychopharmacology

authors： Terranova JP,Chabot C,Barnouin MC,Perrault G,Depoortere R,Griebel G,Scatton B

更新日期：2005-08-01 00:00:00

abstract：:The effects of morphine, ketocyclazocine, cyclazocine, and SKF-10,047 were tested alone and in conjunction with naltrexone or naloxone, in rats responding under a multiple fixed-interval 3-min schedule of food presentation. Under this paradigm, electric shock was delivered on a fixed-ratio schedule for responses occur...

journal_title：Psychopharmacology

authors： Snell D,Harris RA

更新日期：1982-01-01 00:00:00

abstract：RATIONALE:A sensitized dopamine system may be linked to the genesis of psychotic symptoms in schizophrenia. Following withdrawal from amphetamine exposures, psychotic-like traits have been robustly demonstrated, but the presence of cognitive/mnemonic deficits remains uncertain. METHODS:Adult male Lewis and Fischer rat...

journal_title：Psychopharmacology

authors： Peleg-Raibstein D,Yee BK,Feldon J,Hauser J

更新日期：2009-11-01 00:00:00

abstract：:Two experiments investigated the effect of alcohol on retrieval of lexical information. In each, volunteers received alcohol (1 ml per kg body weight) in one session and no alcohol in another in counterbalanced order. Experiment 1 was a computerised version of the Mill Hill vocabulary test in which subjects were requi...

journal_title：Psychopharmacology

authors： Maylor EA,Rabbitt PM,Kingstone AF

更新日期：1988-01-01 00:00:00

abstract：:Established social groups of talapoin monkeys show rank-related differences in aggressive, social and sexual behaviours and visual monitoring, as well as in endocrine and monoamine profiles. Here we describe the effects on these variables of an "anxiogenic drug", beta-carboline carboxylic acid ethyl ester (beta-CCE), ...

journal_title：Psychopharmacology

authors： Vellucci SV,Herbert J,Keverne EB

更新日期：1986-01-01 00:00:00

abstract：:Although previous studies have shown that pharmacological agents, such as buprenorphine, and alternative nondrug reinforcers, such as money or sweetened solutions, reduce cocaine self-administration, few studies have examined the combined effects of these two approaches. The purpose of the present study was to evaluat...

journal_title：Psychopharmacology

authors： Comer SD,Lac ST,Wyvell CL,Carroll ME

更新日期：1996-06-01 00:00:00

abstract：RATIONALE:Tryptophan depletion is used to reduce central serotonergic function and to investigate its role in psychiatric illness. Despite widespread clinical use, its effects on serotonin (5-HT) receptors have not been well characterized. OBJECTIVE:The aim of this study was to examine the effect of acute (ATD) and ch...

journal_title：Psychopharmacology

authors： Cahir M,Ardis T,Reynolds GP,Cooper SJ

更新日期：2007-03-01 00:00:00

abstract：:2,4-Dithiobiuret (DTB) is a sulfonated derivative of urea that is used as a reducing agent in chemical manufacture. Its low acute toxicity to rodents belies a peripherally mediated, delayed-onset muscle weakness which develops during repeated daily exposure. In experiment 1, a standard dose regimen of DTB (0.5 mg/kg p...

journal_title：Psychopharmacology

authors： Bushnell PJ,Oshiro WM

更新日期：1996-02-01 00:00:00

abstract：:The effects of the noncompetitive N-methyl-D-aspartate (NMDA) receptor antagonist, MK-801, on cocaine self-administration were investigated. Forty-six male Wistar rats were trained to intravenously self-administer four unit doses of cocaine (0.19, 0.38, 0.75 and 1.5 mg/kg per injection) on a progressive-ratio schedule...

journal_title：Psychopharmacology

authors： Ranaldi R,French E,Roberts DC

更新日期：1996-11-01 00:00:00

abstract：RATIONALE:Enhancement of dopamine (DA) release by corticosteroids may be of aetiological importance in substance misuse. OBJECTIVES:To examine the effect of sub-chronic administration of hydrocortisone on the response to amphetamine in healthy male volunteers. METHODS:Following baseline assessment, 20 volunteers were...

journal_title：Psychopharmacology

authors： Hearn AJ,Gallagher P,Owen BM,Smith MS,Watson S,Young AH

更新日期：2004-02-01 00:00:00

abstract：OBJECTIVE:People with schizophrenia exhibit a high obesity rate. However, little is known about the prevalence of obesity and its relationship with clinical symptoms and metabolic indicators in first-episode drug-naïve (FEDN) schizophrenia. METHODS:Demographic and lipid parameters were gathered from 297 FEDN schizophr...

journal_title：Psychopharmacology

authors： Tian Y,Wang D,Wei G,Wang J,Zhou H,Xu H,Dai Q,Xiu M,Chen D,Wang L,Zhang XY

更新日期：2020-11-25 00:00:00

abstract：:Peak saccadic eye movement velocity (SEV) and average smooth pursuit gain (SP) are reduced in a dose-dependent manner by diazepam and provide reliable, quantitative measures of benzodiazepine agonist effects. To evaluate the specificity of these eye movement effects for agents acting at the central GABA-benzodiazepine...

journal_title：Psychopharmacology

authors： Hopfenbeck JR,Cowley DS,Radant A,Greenblatt DJ,Roy-Byrne PP

更新日期：1995-04-01 00:00:00

abstract：RATIONAL:Caloric restriction increases the risk of relapse in abstinent drug users. Hormones involved in the regulation of energy balance and food intake, such as leptin and ghrelin, are implicated in drug-related behaviors. OBJECTIVES:We investigated the role of leptin and ghrelin in the augmentation of heroin seekin...

journal_title：Psychopharmacology

authors： D'Cunha TM,Chisholm A,Hryhorczuk C,Fulton S,Shalev U

更新日期：2020-03-01 00:00:00

abstract：:Three adult baboons were trained using a psychophysical procedure to discriminate between different synthetic vowel sounds [symbol: see text]. Baboons pressed and held a lever down to produce a pulsed train of a single reference vowel that served as the standard stimulus. Animals were trained to release the lever only...

journal_title：Psychopharmacology

authors： Hienz RD,Spear DJ,Pyle DA,Brady JV

更新日期：1995-11-01 00:00:00

abstract：BACKGROUND:Although ethanol is frequently used in combination with other psychoactive drugs, the behavioral and pharmacological reasons for this form of polydrug abuse have not been well described. MATERIALS AND METHODS:Rhesus monkeys with indwelling intravenous catheters produced intravenous injections of ethanol (50...

journal_title：Psychopharmacology

authors： Winger G,Galuska CM,Hursh SR

更新日期：2007-09-01 00:00:00

abstract：:Low doses of 8-OH-DPAT (62.5-250 micrograms/kg) were reinforcing in the place preference conditioning procedure, while a higher dose (1 mg/kg) supported a conditioned place aversion. The 5-HT synthesis inhibitor PCPA, and the DA antagonists pimozide and sulpiride, had no effect when administered alone, but abolished t...

journal_title：Psychopharmacology

authors： Papp M,Willner P

更新日期：1991-01-01 00:00:00

abstract：RATIONALE:Drug addiction is a chronically relapsing disorder characterised by compulsive drug use and loss of control over drug intake. Although several theories propose impulsivity as a key component of addiction, the precise nature of this relationship remains unclear. OBJECTIVES:This study aims to investigate the s...

journal_title：Psychopharmacology

authors： Kolokotroni KZ,Rodgers RJ,Harrison AA

更新日期：2012-01-01 00:00:00

abstract：:Rats chronically treated with increasing daily doses of delta 9-tetrahydrocannabinol (delta 9-THC) for up to 5 or 10 days exhibit a withdrawal-like behavioural response when challenged with clomipramine, a potent inhibitor of serotonin (5-hydroxytryptamine) reuptake, at the time when the next injection of delta 9-THC ...

journal_title：Psychopharmacology

authors： Verberne AJ,Taylor DA,Fennessy MR

更新日期：1981-01-01 00:00:00

abstract：:Normal unoperated rats were tested for rotation (i.e., circling behavior) in a spherical "rotometer" and dose-response relationships were generated using d-amphetamine, apomorphine, L-Dopa, haloperidol, and scopolamine. The rotation induced by amphetamine was significantly antagonized by alpha-methyl-p-tyrosine and ha...

journal_title：Psychopharmacology

authors： Jerussi TP,Glick SD

更新日期：1976-06-23 00:00:00

abstract：:Food reward has been associated with activation of noradrenergic mechanisms in the brain. Using rats trained to press a lever for food reward, we have investigated the effects of 6-hydroxydopamine lesions, which severly depleted hypothalamic noradrenaline, on the willingness of the rats to press the lever for food rew...

journal_title：Psychopharmacology

authors： Kruk ZL,Millar J

更新日期：1979-06-28 00:00:00

abstract：:Rats were trained to discriminate fenfluramine (1.0 mg/kg) from saline in a two-lever drug discrimination task. The dose-response curve for this discrimination was orderly with an ED50 of about one-half of the training dose (0.52 mg/kg). In substitution tests, indirect (p-chloroamphetamine) and direct (quipazine, MK-2...

journal_title：Psychopharmacology

authors： White FJ,Appel JB

更新日期：1981-01-01 00:00:00