Physiological Psychology
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Gradual increase in self-stimulation response rates: Effect of electrode loci
Physiological Psychology - Tập 7 - Trang 135-138 - 2013
Nine male rats, each with electrodes implanted in a telencephalic region and seven of them also with successful placements in a more caudal brain reward region, were taught to self-stimulate. Rates in the caudate nucleus and medial frontal cortex showed a gradual increase over daily sessions, but self-stimulation in lateral hypothalamus, substantia nigra, and reticular formation did not have this ......
Effects of septal lesions on open-field gregariousness in rats reared prior to surgery in group versus individual cages
Physiological Psychology - Tập 13 - Trang 107-110 - 2013
Septal lesions were given to adult animals which had been reared in isolation or in group cages from 30–90 days of age. Septal lesions and isolated rearing produced additive increases in open-field contact time. These results were similar to those observed in a previous study in which septal lesions were produced in infancy and followed by differential housing. Emotionality and activity were also ......
Taste aversion in rats with lesions in the frontal lobes: No evidence for interoceptive agnosia
Physiological Psychology - Tập 3 - Trang 43-46 - 2013
Ablation of either of the two cortical projection areas of the mediodorsal thalamic nucleus, as well as lesions in the region of the neostriatum associated with the anteromedial cortex, failed to interfere with formation of taste aversion in rats. The prefrontal cortex and the ablated part of the neostriatum in rats are not necessary for association of external and visceral cues or for modificatio......
Effects of Δ-9-tetrahydrocannabinol on the slope of auditory generalization gradients in rats
Physiological Psychology - Tập 4 - Trang 145-148 - 2013
Groups of rats were given 2, 4, or 6 mg/kg Δ-9-tetrahydrocannabinol (Δ-9-THC) during shuttle-avoidance training and auditory generalization testing in extinction. Although the drug had no discernible effect on acquisition performance, there was a dose-dependent influence on the slopes of the generalization gradients. It was concluded that Δ-9-THC can affect the extent of auditory generalization du......
The effects of lesions in amygdala or dorsomedial frontal cortex on reinforcement omission and noncontingent reinforcement in rats
Physiological Psychology - - 2013
Two groups of six rats with lesions of the amygdala or dorsomedial frontal cortex were compared to normal controls in their response to occasional omission of food reward following training on an FI 60-sec schedule (Experiment 1). Both brain-damaged groups showed reliably greater increases in their responding in intervals following reward omission compared to their responding in intervals followin......
Taming of wild Rattus norvegicus by lesions of the mesencephalic central gray
Physiological Psychology - Tập 9 Số 2 - Trang 157-163 - 1981
Dietary flavor acceptance in infant rats established by association with effects of nutrient composition
Physiological Psychology - Tập 2 - Trang 313-319 - 2013
Rat pups come to accept a starch-containing diet and to prefer its flavor or other sensory properties, even when they also have access to the laboratory chow on which their mother is maintained. Protein induces acceptance somewhat more weakly, triglyceride not at all under the conditions used. Nutrient-free material becomes aversive. It is concluded that at least part of the acceptability of a foo......
Fornix lesions: Effects on active and passive avoidance behavior
Physiological Psychology - Tập 3 - Trang 201-204 - 2013
Twenty-four fornix-lesioned and 16 sham-operated rats were tested on one-way active avoidance acquisition, subsequent passive avoidance of the previously safe compartment, and acquisition and extinction of the passive avoidance of an electrified foodcup. Rats with lesions of the fornix made significantly more errors than controls in learning the one-way active avoidance acquisition task and had si......
Postconditioning CS-alone exposure as a source of interference in a taste aversion paradigm
Physiological Psychology - Tập 6 - Trang 255-260 - 2013
Two studies were conducted to study the effects of unpaired sucrose (CS) experiences on the acquisition, retention, and reacquisition of a sucrose aversion. In Experiment 1, rats received 0, 1, or 3 preconditioning CS exposures and/or 0, 1, or 3 postconditioning CS exposures. Sucrose exposures prior to conditioning interfered with the acquisition of a sucrose aversion, while sucrose-only experienc......
Olfactory perception and inclusive fitness
Physiological Psychology - Tập 7 - Trang 303-306 - 2013
Within an established colony, sexually mature male rats interact with little or no conflict, but unfamiliar males are readily attacked and subjected to’ prolonged and physiologically deteriorating social stress. Evidence is offered in support of the ontogeny, stimulus characteristics, and adaptive significance of this social discrimination. It is asserted (1) that two odor categories are implicate......
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