Reinforcement Schedule (Latest Articles)

Latest indexed articles for 'Reinforcement Schedule'

Articles 81 to 90 of 200:

Self administration of heroin and cocaine in morphine-dependent and morphine-withdrawn rhesus monkeys.

3 Feb 2009 RATIONALE: Dependence can develop during chronic opioid use, and the emergence of withdrawal might promote drug taking. OBJECTIVE: This study examined how chronic morphine administration or withdrawal modified self administration of heroin or ...
rec_pub_19194694-self-administration-heroin-cocaine-morphine-dependent-morphine.htm

Reaction times identify a Pavlovian component in a two-choice discrimination.

Feb 2009 Six pigeons discriminated on discrete trials between two colors. In Experiment 1, two luminous spots were both either blue or green and the reinforced responses were "peck left" for blue and "peck right" for green. In Experiment 2, the hue of a ...
rec_pub_19429212-reaction-times-identify-pavlovian-component-two-choice-discrimination.htm

Nicotine does not enhance discrimination performance in a temporal bisection procedure.

30 Jan 2009 Recent reports of selective disruption of stimulus control by drug administration and other disruptive operations in temporal discrimination procedures may be interpreted as a disruption of attention to the temporal sample stimuli. This experiment ...
rec_pub_19179853-nicotine-does-enhance-discrimination-performance-temporal-bisection.htm

WAY 100635 produces discriminative stimulus effects in rats mediated by dopamine D(4) receptor activation.

30 Jan 2009 In-vitro studies have shown that WAY 100635 is not only a potent 5-HT1A antagonist, but also has high affinity and efficacy at the dopamine D(4) receptor. Nevertheless, the behavioral effects of this compound have not been investigated. This study ...
rec_pub_19179855-way-100635-produces-discriminative-stimulus-effects-rats-mediated.htm

Relative potency and effectiveness of flunitrazepam, ethanol, and beta-CCE for disrupting the acquisition and retention of response sequences in rats.

30 Jan 2009 Despite the knowledge that gamma-aminobutyric acid(A) modulators can affect learning and memory, their capacity for disrupting each of these complex processes is rarely compared, and often mistakenly assumed to occur with identical potency. For ...
rec_pub_19179849-relative-potency-effectiveness-flunitrazepam-ethanol-beta-cce.htm

Reduced sensitivity to the locomotor-stimulant effects of cocaine is associated with increased sensitivity to its discriminative stimulus properties.

30 Jan 2009 Outbred Long-Evans rats exhibit wide variation in their locomotor response to cocaine. Here, we investigated the relationship between these individual differences and interoceptive effects of cocaine in low cocaine responder (LCR) and high cocaine ...
rec_pub_19125118-reduced-sensitivity-locomotor-stimulant-effects-cocaine-associated.htm

Further analysis of perception of reversed Müller-Lyer figures for pigeons (Columba livia).

30 Jan 2009 Nakamura, et al. recently showed that pigeons experience the standard Müller-Lyer illusion but not the reversed illusion induced by detaching the arrowheads from the target line. This study re-examined pigeons' perception of this reversed figure by ...
rec_pub_19425465-further-analysis-perception-reversed-m-ller-lyer-figures-pigeons.htm

Demand for food and cocaine in Fischer and Lewis rats.

30 Jan 2009 Fischer and Lewis rat strains often serve as animal vulnerability models for drug abuse and addiction. When these strains respond for drugs of abuse, several measures, including total drug intake, response rate and progressive-ratio breakpoints, ...
rec_pub_19170441-demand-food-cocaine-fischer-lewis-rats.htm

Excessive alcohol consumption is blocked by glial cell line-derived neurotrophic factor.

30 Jan 2009 We previously found that activation of the glial cell line-derived neurotrophic factor (GDNF) pathway in the ventral tegmental area (VTA) reduces moderate alcohol (ethanol) intake in a rat operant self-administration paradigm. Here, we set out to ...
rec_pub_19185208-excessive-alcohol-consumption-blocked-glial-cell-line-derived.htm

Operant generalization of auditory tempo in quail neonates.

30 Jan 2009 Operant generalization, a building block of cognition, has never been studied in neonates. We developed a preparation for newly hatched quail in order to investigate the form of the generalization gradient very early in development. For their first ...
rec_pub_19145025-operant-generalization-auditory-tempo-quail-neonates.htm

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