Showing papers in "Behavioral and Neural Biology in 1987"

TL;DR: The results demonstrate a marked impairment of LTP in hippocampal explants taken from rats exposed to stress, and the significance of this result with respect to cellular mechanisms underlying the relationship between stress, cognition, and learning is discussed.

TL;DR: It is hypothesized that a concurrence of hormonal, neural, and behavioral changes facilitates song learning in adulthood.

TL;DR: It is speculated that the behavioral and anatomical impairment observed in the normal cycling female Sprague-Dawley rats with brain injury is due to higher levels of vasopressin, a potent vasoconstrictor synchronized withbrain injury in the authors' manipulation.

TL;DR: It is suggested that blood glucose levels are not critical for the memory-improving effect, that glucose and fructose may act on the same substrate and, because fructose does not act directly on the brain, it raises the possibility that both substances act peripherally.

TL;DR: Central nicotinic as well as muscarinic cholinergic receptors are involved with cognitive functioning in female Sprague-Dawley rats in the radial-arm maze.

TL;DR: The results indicate that a drop in fatty acid oxidation caused by mercaptoacetate triggers a meal, which implicates fatty acids oxidation in the maintenance of postprandial satiety.

TL;DR: The CO2/O2 hypothesis was rejected because breathing neither pure O2 nor gases high in CO2 had a significant effect on yawning although both increased breathing rate.

TL;DR: It is concluded that neocortex and possibly the cholinergic projections to neocortex play an important role in mediating reference memory.

TL;DR: The data suggest that the analgesia may represent a physiological correlate of novelty and that the response can be impaired by post-training treatments.

TL;DR: Golden hamsters (Mesocricetus auratus) are sexually receptive for 19-21 h around the time of ovulation and vaginal pH was measured immediately before mating, finding a prefertilization mechanism for sex ratio regulation could be highly adaptive since little or no parental reproductive potential is lost.

TL;DR: When day-old chicks are trained on a passive avoidance task there is enhanced synthesis of glycoproteins and bilateral intracerebral injections of 20 mumole of 2-deoxygalactose (2-D-gal), administered just before and just after training on the task produce amnesia for the avoidance.

TL;DR: Differences among strains were that agonistic behavior among subordinates was higher in the Balb/cj and NIH groups than in the C57Bl/6j mice, and dominants showed higher rates of Wheel Running Activity than subordinates.

TL;DR: The present results lend further support to the view that both serotonin and acetylcholine play important roles in memory retrieval and provide additional support for a functional interaction between the serotonergic and cholinergic nervous systems in the mediation of behavior.

TL;DR: Evidence suggests that voluntary exercise lowers the hyperexploratory behavior and aggression in the spontaneously hypertensive rat and that an abrupt stop in exercise gives an "abstinence" reaction.

TL;DR: Prenatal stress significantly increased postpartum aggression in C57BL/6J female mice and reduced the behavior in DBA/2J females and intermale aggression was not influenced by prenatal stress in either strain.

TL;DR: It was found that mouse pups could be stressed by removing the litter from the dam for 15 min/day for the first 14 days of life and exposing them to a novel odor (clean bedding) and this stress procedure also produced a long-term modification in maternal behavior.

TL;DR: Great elaboration of neural structures associated with perceptual-motor enrichment probably accounted for the initial sparing of the enriched group, and the opportunity for physical exercise afforded wheel animals preoperatively may have enhanced motor capabilities that aided recovery.

TL;DR: The inference of a single genetic determinant for activity measured either as locomotor or investigatory responses is not supported by these data, nor is there any apparent relationship between activity and Hld.

TL;DR: Results indicate that brief mother-infant separation can activate the pituitary-adrenal system in mother as well as infant guinea pigs and they provide further evidence for the existence of a reciprocal mother-Infant attachment in this species.

TL;DR: In this article, it was shown that balloon distension can serve as a reasonable stimulus in experiments in simplified preparations in which the nervous system can be studied, and the evidence indicates that the satiation that eventually occurs in nerve-sectioned animals, at least in part, is due to depression of feeding following very prolonged sensory stimulation.

TL;DR: It is concluded that mechanisms of food arousal are adapted to the animal's habitat and life-style and negatively correlated with a more general measure of behavioral arousal, the Behavioral State Score.

TL;DR: Evidence is provided that novel experiences prior to retention testing affect retention performance and support is provided for the view that the effect may involve the release of beta-endorphin.

TL;DR: It is concluded that avoidance learning and performance cannot be considered as unitary variables and that the interaction of genetic with environmental factors, including the conditions of the specific testing situation, are important considerations in any interpretation of genetic effects.

TL;DR: Results indicate that urine and blood plasma from aggressive pigs reduces aggression by test pigs compared with the effects of urine and plasma collected from socially stable, handled pigs.

TL;DR: In the case of free-moving gastropod Aplysia, the authors of as discussed by the authors found that the head lifting, head waving, and orientation of the head to food can involve coordinated activity of several different ganglia, including the cerebral, pedal, and pleural ganglia.

TL;DR: Altered alterations in sympathetic-target tissue development during the first postnatal week of life may contribute in part to the higher arterial pressures maintained by SHRs throughout the lifespan.

TL;DR: The results suggest that novelty-induced grooming is a sex-influenced behavior, with females grooming more than males, and that animals exposed prenatally to alcohol and tested as adults may have altered responses to certain stressors under specific conditions.

TL;DR: In this paper, the effect of punishment per se was controlled for by the use of yoked animals that received punishments whenever the experimental (master) animals did, and experiments were performed with pairs of animals, one eye of each used as master or control.

TL;DR: In this article, the authors found that the responses to auditory stimuli increased when these stimuli were presented in an unrestrained, group setting, yet responses to the vocalizations remained greater than those following control stimuli.

TL;DR: The results showed that the associative response of hippocampal neurons may be dissociated from the Pavlovian conditioned responses the CS elicits, and support the hypothesis that hippocampal cellular responses represent a neural index of the acquired CS-US associative representation.