Conditioning, Operant (Latest Articles)

Latest indexed articles for 'Conditioning, Operant'

Articles 111 to 120 of 200:

Keep cool: memory is retained during hibernation in Alpine marmots.

21 Apr 2009 Hibernators display severe changes in brain structure during deep torpor, including alterations in synaptic constitution. To address a possible effect on long-term memory, we examined learning behavior and memory of the hibernator Marmota marmota. ...
rec_pub_19393672-keep-cool-memory-retained-hibernation-alpine-marmots.htm

Varenicline attenuates nicotine-enhanced brain-stimulation reward by activation of alpha4beta2 nicotinic receptors in rats.

20 Apr 2009 Varenicline, a partial alpha4beta2 and full alpha7 nicotinic receptor agonist, has been shown to inhibit nicotine self-administration and nicotine-induced increases in extracellular dopamine in the nucleus accumbens. In the present study, we ...
rec_pub_19393252-varenicline-attenuates-nicotine-enhanced-brain-stimulation-reward.htm

Proteomic analysis of the nucleus accumbens of rats with different vulnerability to cocaine addiction.

20 Apr 2009 Vulnerability to the addictive effects of drugs of abuse varies among individuals, but the biological basis of these differences are poorly known. This work tries to increase this knowledge by comparing the brain proteome of animals with different ...
rec_pub_19393250-proteomic-analysis-nucleus-accumbens-rats-different-vulnerability.htm

Dominant rats are natural risk takers and display increased motivation for food reward.

20 Apr 2009 Risk-taking behavior is a vital aspect mediating the formation of social structure in animals. Here, we utilized the visible burrow system (VBS), a model in which rats form dominance hierarchies, to test the hypothesis that dominant rats in the VBS ...
rec_pub_19393296-dominant-rats-natural-risk-takers-display-increased-motivation-food.htm

Strain differences between Lewis and Fischer 344 rats in the modulation of dopaminergic receptors after morphine self-administration and during extinction.

15 Apr 2009 The Lewis (LEW) and Fischer 344 (F344) rat strains have been used as a model to study genetic vulnerability to drug addiction and they differ in their dopaminergic systems. We have studied the variation in the D1-like and D2-like receptors in ...
rec_pub_19376142-strain-differences-lewis-fischer-344-rats-modulation-dopaminergic.htm

Escalation of food-maintained responding and sensitivity to the locomotor stimulant effects of cocaine in mice.

15 Apr 2009 Escalation of drug self-administration is a consequence of extended drug access and is thought to be specifically related to addiction, but few studies have investigated whether intake of non-drug reinforcers may also escalate with extended-access. ...
rec_pub_19376153-escalation-food-maintained-responding-sensitivity-locomotor-stimulant.htm

Juvenile methylphenidate exposure and factors that influence incentive processing.

15 Apr 2009 Methylphenidate (MPH) is one of the few psychotropic agents approved for use in pediatric populations, underscoring the importance of elucidating any long-term consequences following exposure to this agent. Here, we examined the influence of several ...
rec_pub_19372691-juvenile-methylphenidate-exposure-factors-influence-incentive.htm

Perturbations in different forms of cost/benefit decision making induced by repeated amphetamine exposure.

12 Apr 2009 RATIONALE: Psychostimulant abuse has been linked to impairments in cost-benefit decision making. OBJECTIVE: We assessed the effects of repeated amphetamine (AMPH) treatment in rodents on two distinct forms of decision making. MATERIALS AND METHODS: ...
rec_pub_19365622-perturbations-different-forms-cost-benefit-decision-making-induced.htm

Effects of cocaine self-administration history under limited and extended access conditions on in vivo striatal dopamine neurochemistry and acoustic startle in rhesus monkeys.

12 Apr 2009 RATIONALE: The transition from infrequent and controlled cocaine use to dependence may involve enduring changes in neurobiology as a consequence of persistent drug use. OBJECTIVE: The present study utilized an intravenous drug self-administration ...
rec_pub_19365621-effects-cocaine-self-administration-history-limited-extended-access.htm

18-Methoxycoronaridine blocks acquisition but enhances reinstatement of a cocaine place preference.

9 Apr 2009 The iboga alkaloid congener, 18-methoxycoronaridine (18-MC), decreases self-administration of multiple drugs of abuse. Here, in a biased procedure, we investigated whether 18-MC would have a similar effect on the acquisition, expression and ...
rec_pub_19442876-18-methoxycoronaridine-blocks-acquisition-enhances-reinstatement.htm

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