Showing papers in "Hormones and Behavior in 1999"

TL;DR: In both sexes, salivary testosterone was significantly related to mood and selective attention to angry faces when saliva samples were taken 6 h before questionnaire and task assessment.

TL;DR: This study proposes the hypothesis that aggression may be better correlated with species patterns of AVP-ir staining density and receptor distribution, and suggests that Parental behavior does not appear to predict differences in patterns of Analsis vasopressinergic neurons and receptors across species.

TL;DR: It is suggested that the sex-atypical activities and interests of females with CAH reflect direct effects of androgens on the developing brain rather than social responses to virilized genitalia, and that population sex differences in activities and interest arise in part from sex Differences in early androgens.

TL;DR: This laboratory has developed a reliable, efficient, and highly sensitive procedure for measuring testosterone in children's saliva that does not require separation or extraction and can be easily applied to the investigation of testosterone-behavior relations in the context of studies on child health and development.

TL;DR: The results indicate that in a real, highly competitive situation, T changes are not directly a response to the outcome, but rather to the contribution the individual makes to it and to the causes he attributes.

TL;DR: In guinea pigs the process of domestication has led to typical behavioral traits-reduced aggressiveness, increased social tolerance-which have also been found in comparisons between wild and domestic forms of other species.

TL;DR: Blood samples from male hamsters during their mate's gestation and early lactation show that key hormones important in maternal behavior are also changing in males and differ for two closely related species with different levels of paternal care.

TL;DR: The idea that OT and AVP receptor systems are phylogenetically plastic, perhaps facilitating the evolution of species-typical social behavior patterns is discussed.

TL;DR: It is demonstrated that estrogen replacement can enhance acquisition of a spatial memory task and reduce performance deficits associated with hippocampal cholinergic impairment.

TL;DR: The lack of significant changes in testosterone levels with the onset of the rainy and copulatory season and the lack of prebreeding increases in cortisol may be related to the low levels of overt aggression displayed by male muriquis over access to mates.

TL;DR: Testing the hypothesis that implicit power motivation moderates individuals' testosterone responses to the anticipated success in and actual outcome of a dominance contest found individuals high only in p Power had elevated testosterone after imagining a success in a subsequent dominance contest.

TL;DR: A general role for the POM is suggested in the expression of behaviors related to sexual arousal or anticipation, including song, in reproductively active male starlings.

TL;DR: Use of bilevel chambers allows complex patterns of sexual behavior to be observed in female rats and may thus facilitate the identification of neurochemical or endocrine mechanisms associated with different aspects of female sexual motivation and performance.

TL;DR: The pattern of androgen levels exhibited by reproductively active parental male midshipman may reflect a compromise between investment in paternal care versus courtship and/or territoriality.

TL;DR: It is predicted that subjects would manifest shorter run times when the goalbox contained a receptive/proceptive female as opposed to a nonreceptive female target, indicating that sexually naive males are inherently motivated by female precopulatory cues.

TL;DR: The biological significance of hormonal, behavioral, and coloration responses of resident male S. undulatus in social interactions with conspecifics are clarified in terms of potentially aggressive versus courtship interactions and breeding versus postbreeding contexts.

TL;DR: Results clearly indicate that female behavior is a good indicator of the periovulatory phase and can enhance female attractivity.

TL;DR: The results of this study suggest that the PAG may provide the anatomical substrate for steroid mediated changes in nociceptive thresholds and reproductive behavior.

TL;DR: The findings in the nonhuman primate suggest that biological rather than sociocultural factors underlie the sex differences in cognition and their diminution with age.

TL;DR: It is suggested that AD patients with higher endogenous levels of DHEAS may perform better on some memory tasks than those with lower levels, while AD patientsWith lower levels of CRT may perform worse on Delayed Route Recall than thosewith higher CRT.

TL;DR: It is concluded that NCE depends on androgen-sensitive systems in the brain, but androgens-sensitive neurons in the lumbosacral spinal cord may also play a role.

TL;DR: It is indicated that PRL and previous breeding experience both enhance the parental responsiveness of nonbreeding female doves and that under optimal hormonal, experiential, and squab exposure conditions, nonbreeding doves exhibit levels of parental activity that rival those of normally breeding parents.

TL;DR: The results suggest that the genetic/phenotypic profile of the animal is a determinant in the changes observed in the adult stress response after early exposure to stressors.

TL;DR: This work altered early androgen exposure by treating females with testosterone (T) at birth and used females treated with oil vehicle as controls to elucidate the proximal causes of play, and observed no influence of either T treatment or food provisioning on the temporal patterning of play behavior.

TL;DR: A detailed comparison of the "nursing" and other parental behaviors of maternally sensitized virgin females and postpartum lactating dams is provided to reflect differences in motivation as well as sensory inputs they receive from pups.

TL;DR: It is reported here that this behavioral variation of animals under field conditions is associated with variations in AVT-immunoreactive (AVT-ir) staining in distinct brain nuclei, and it is plausible that calling males are releasing more AVT from neurons in the ACC, depleting reserves within the cells, and that the released AVT elicits calling behavior.

TL;DR: In emperor penguins, increased prolactin secretion appears to be triggered around the time of egg laying and continues, driven by an endogenous mechanism, through incubation and brooding until rearing is completed.

TL;DR: The results in terms of how scramble polygamy might influence behavioral androgen interactions differently from more typical combative and territorial forms of male polygamy are discussed.

TL;DR: Female zebra finches given estradiol benzoate as nestlings and testosterone propionate as adults show masculinized sexual partner preference, preferring females instead of males, which suggests an organizational effect of EB onSexual partner preference in a socially monogamous species that pairs for life.

TL;DR: The results suggest that early exposure to maternal estrogens in ovo might be involved in establishing intraindividual variation in female-specific phenotypic traits, as has previously been demonstrated for androgens and male behavioral traits.