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Hormones and Behavior

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https://www.readbyqxmd.com/read/28428002/performance-during-competition-and-competition-outcome-in-relation-to-testosterone-and-cortisol-among-women
#1
Andrea Henry, Jason R Sattizahn, Greg J Norman, Sian L Beilock, Dario Maestripieri
A contribution to a special issue on Hormones and Human Competition. This study investigated the relation between competition, testosterone (T), and cortisol (C) in women. One hundred and twenty female participants competed against a male confederate in a computerized laboratory task. The task was preprogrammed so that half the women won and half of the women lost the competition. T and C concentrations were measured in saliva samples collected at four time points before and after the competition. Accuracy and reaction time during the competition were recorded...
April 17, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28414036/blunted-cortisol-response-to-acute-pre-learning-stress-prevents-misinformation-effect-in-a-forced-confabulation-paradigm
#2
Phillip R Zoladz, Chelsea E Cadle, Alison M Dailey, Miranda K Fiely, David M Peters, Hannah E Nagle, Brianne E Mosley, Amanda R Scharf, Callie M Brown, Tessa J Duffy, McKenna B Earley, Boyd R Rorabaugh, Kristie E Payment
Research examining the effects of stress on false memory formation has been equivocal, partly because of the complex nature of stress-memory interactions. A major factor influencing stress effects on learning is the timing of stress relative to encoding. Previous work has shown that brief stressors administered immediately before learning enhance long-term memory. Thus, we predicted that brief stress immediately before learning would decrease participants' susceptibility to subsequent misinformation and reduce false memory formation...
April 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28390864/an-acute-social-defeat-stressor-in-early-puberty-increases-susceptibility-to-social-defeat-in-adulthood
#3
Anna M Rosenhauer, Katharine E McCann, Alisa Norvelle, Kim L Huhman
Syrian hamsters readily display territorial aggression; if they lose even a single agonistic encounter, however, hamsters show striking reductions in aggressive behavior and increases in submissive behavior, a distinct behavioral change that we have previously termed conditioned defeat. This acute social defeat stressor is primarily psychological and is effective in both males and females. Therefore, we maintain that this procedure presents an ideal model for studying behavioral and physiological responses to social stress...
April 5, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28389277/spatial-learning-and-memory-in-male-mice-with-altered-growth-hormone-action
#4
Amrita Basu, Hewlet G McFarlane, John J Kopchick
Growth hormone (GH) has a significant influence on cognitive performance in humans and other mammals. To understand the influence of altered GH action on cognition, we assessed spatial learning and memory using a Barnes maze (BM) comparing twelve-month old, male, bovine GH (bGH) and GH receptor antagonist (GHA) transgenic mice and their corresponding wild type (WT) littermates. During the acquisition training period in the BM, bGH mice showed increased latency, traveled longer path lengths and made more errors to reach the target than WT mice indicating significantly poorer learning...
April 4, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28377236/synthesizing-research-on-field-endocrinology-of-nonhuman-primates-and-humans
#5
James R Roney, James P Higham
No abstract text is available yet for this article.
April 1, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28365397/hormonal-underpinnings-of-status-conflict-testosterone-and-cortisol-are-related-to-decisions-and-satisfaction-in-the-hawk-dove-game
#6
Pranjal H Mehta, Nicole M Lawless Desjardins, Mark van Vugt, Robert A Josephs
A contribution to a special issue on Hormones and Human Competition. Testosterone is theorized to influence status-seeking behaviors such as social dominance and competitive behavior, but supporting evidence is mixed. The present study tested the roles of testosterone and cortisol in the hawk-dove game, a dyadic economic decision-making paradigm in which earnings depend on one's own and the other player's choices. If one person selects the hawk strategy and the other person selects the dove strategy, the player who selected hawk attains a greater financial pay-off (status differentiation)...
March 29, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28359742/increased-vasopressin-expression-in-the-bnst-accompanies-paternally-induced-territoriality-in-male-and-female-california-mouse-offspring
#7
Christine N Yohn, Amanda B Leithead, Elizabeth A Becker
While developmental consequences of parental investment on species-typical social behaviors has been extensively characterized in same-sex parent-offspring interactions, the impact of opposite-sex relationships is less clear. In the bi-parental California mouse (Peromyscus californicus), paternal retrieval behavior induces territorial aggression and the expression of arginine vasopressin (AVP) in adult male offspring. Although similar patterns of territorially emerge among females, the sexually dimorphic AVP system has not been considered since it is generally thought to regulate male-typical behavior...
March 27, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28356224/socially-induced-variation-in-physiological-mediators-of-parental-care-in-a-colonial-bird
#8
Michaël Beaulieu, André Ancel, Olivier Chastel, François Criscuolo, Thierry Raclot
Social facilitation of reproduction occurs in humans and animals, and may represent one of the bases of reproduction in groups. However, its underlying physiological mechanisms remain largely unexplored. Here, we found in a colonial bird, the Adélie penguin (Pygoscelis adeliae), that the number of parental interactions (nest relief ceremonies) performed by breeding individuals on the colony was positively related to prolactin levels in other breeding individuals exposed to these interactions (i.e. focal individuals)...
March 26, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28322748/oxytocin-promotes-attention-to-social-cues-regardless-of-group-membership
#9
Michaela Pfundmair, Clarissa Zwarg, Markus Paulus, Anne Rimpel
The social saliency account proposes that oxytocin (OT) plays a major role in modulating attentional shifts toward social cues at early stages of processing. We investigated how OT promotes early attention toward nonsocial and social stimuli and explored differences between in-group- and out-group-related social cues. After participants intranasally self-administered OT or placebo, they were eye-tracked while observing a nonsocial and social cues that were assigned to the in- or out-group by a minimal group paradigm...
March 23, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28315307/no-compelling-positive-association-between-ovarian-hormones-and-wearing-red-clothing-when-using-multinomial-analyses
#10
Khandis R Blake, Barnaby J W Dixson, Siobhan M O'Dean, Thomas F Denson
Several studies report that wearing red clothing enhances women's attractiveness and signals sexual proceptivity to men. The associated hypothesis that women will choose to wear red clothing when fertility is highest, however, has received mixed support from empirical studies. One possible cause of these mixed findings may be methodological. The current study aimed to replicate recent findings suggesting a positive association between hormonal profiles associated with high fertility (high estradiol to progesterone ratios) and the likelihood of wearing red...
March 20, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28324706/combining-oxytocin-administration-and-positive-emotion-inductions-examining-social-perception-and-analytical-performance
#11
Lauren J Human, Katherine R Thorson, Joshua D Woolley, Wendy Berry Mendes
Intranasal administration of the hypothalamic neuropeptide oxytocin (OT) has, in some studies, been associated with positive effects on social perception and cognition. Similarly, positive emotion inductions can improve a range of perceptual and performance-based behaviors. In this exploratory study, we examined how OT administration and positive emotion inductions interact in their associations with social and analytical performance. Participants (N=124) were randomly assigned to receive an intranasal spray of OT (40IU) or placebo and then viewed one of three videos designed to engender one of the following emotion states: social warmth, pride, or an affectively neutral state...
March 17, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28288796/opposite-effects-of-nonapeptide-antagonists-on-paternal-behavior-in-the-teleost-fish-amphiprion-ocellaris
#12
Ross DeAngelis, Joseph Gogola, Logan Dodd, Justin S Rhodes
The nonapeptides isotocin (IT) and arginine vasotocin (AVT), along with their mammalian homologs oxytocin and arginine vasopressin, are well known regulators of social behaviors across vertebrate taxa. However, little is known about their involvement in paternal care. Here, we measured the effect of an IT and an AVT V1a receptor antagonist on paternal behaviors in the primarily paternal teleost Amphiprion ocellaris. We also measured the effect of the IT receptor antagonist on aggression in dyadic contests between two non-reproductive fish to assess specificity of the effect on paternal behaviors...
March 17, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28284709/the-next-step-for-stress-research-in-primates-to-identify-relationships-between-glucocorticoid-secretion-and-fitness
#13
REVIEW
Jacinta C Beehner, Thore J Bergman
Glucocorticoids are hormones that mediate the energetic demands that accompany environmental challenges. It is therefore not surprising that these metabolic hormones have come to dominate endocrine research on the health and fitness of wild populations. Yet, several problems have been identified in the vertebrate research that also apply to the non-human primate research. First, glucocorticoids should not be used as a proxy for fitness (unless a link has previously been established between glucocorticoids and fitness for a particular population)...
March 15, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28257759/blockade-of-trkb-receptors-in-the-nucleus-accumbens-prior-to-heterotypic-stress-alters-corticotropin-releasing-hormone-crh-vesicular-glutamate-transporter-2-vglut2-and-glucocorticoid-receptor-gr-within-the-mesolimbic-pathway
#14
Idu Azogu, Helene Plamondon
Inhibition of stress-induced elevations in brain-derived neurotrophic factor (BDNF) or its primary receptor tyrosine-related kinase B (TrkB) within the reward pathway may modulate vulnerability to anxiety and mood disorders. The current study examined the role of BDNF/TrkB signaling on biochemistry and behavior under basal conditions and following exposure to a 10-day heterotypic stress paradigm in male rats. Effects of intra-accumbal administration of TrkB antagonist ANA-12 (0.25μg/0.5μl/min) on anxiety, and expression of Trk-B, corticotropin-releasing hormone (CRH), vesicular glutamate transporter 2 (vGluT2) and glucocorticoid receptor (GR) within the mesolimbic pathway were determined...
March 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28263764/stress-responsiveness-and-anxiety-like-behavior-the-early-social-environment-differentially-shapes-stability-over-time-in-a-small-rodent
#15
Susanne Sangenstedt, Iman Jaljuli, Norbert Sachser, Sylvia Kaiser
The early social environment can profoundly affect behavioral and physiological phenotypes. We investigated how male wild cavy offspring, whose mothers had either lived in a stable (SE) or an unstable social environment (UE) during pregnancy and lactation, differed in their anxiety-like behavior and stress responsiveness. At two different time points in life, we tested the offspring's anxiety-like behavior in a dark-light test and their endocrine reaction to challenge in a cortisol reactivity test. Furthermore, we analyzed whether individual traits remained stable over time...
March 13, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28257758/cognition-in-female-rats-after-blocking-conversion-of-androgens-to-estrogens
#16
George T Taylor, Francesca M Manzella, Jacob Huffman, Omar H Cabrera, Jessica Hoffman
Women and non-human females have surprisingly high levels of circulating testosterone, yet the effects of androgens on non-reproductive behaviors, including cognition, of females are not well characterized. The current project used an aromatase inhibitor, letrozole, to block conversion of androgens to estrogens. Adult female rats were ovariectomized and administered either vehicle only, testosterone propionate only (400μg/kg, TP only), letrozole only (1mg/kg, Letro only), or the combination of letrozole and testosterone (TP+Letro) over 4weeks...
March 12, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28254475/oxytocin-and-vulnerable-romantic-relationships
#17
Nicholas M Grebe, Andreas Aarseth Kristoffersen, Trond Viggo Grøntvedt, Melissa Emery Thompson, Leif Edward Ottesen Kennair, Steven W Gangestad
Oxytocin (OT) has been implicated in the formation and maintenance of various social relationships, including human romantic relationships. Competing models predict, alternatively, positive or negative associations between naturally-occurring OT levels and romantic relationship quality. Empirical tests of these models have been equivocal. We propose a novel hypothesis ('Identify and Invest') that frames OT as an allocator of psychological investment toward valued, vulnerable relationships, and test this proposal in two studies...
March 12, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28263765/exogenous-testosterone-decreases-men-s-personal-distance-in-a-social-threat-context
#18
Lisa Wagels, Sina Radke, Katharina Sophia Goerlich, Ute Habel, Mikhail Votinov
BACKGROUND: Testosterone can motivate human approach and avoidance behavior. Specifically, the conscious recognition of and implicit reaction to angry facial expressions is influenced by testosterone. The study tested whether exogenous testosterone modulates the personal distance (PD) humans prefer in a social threat context. METHODS: 82 healthy male participants underwent either transdermal testosterone (testosterone group) or placebo application (placebo group)...
March 11, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28284710/neuroendocrine-control-in-social-relationships-in-non-human-primates-field-based-evidence
#19
REVIEW
Toni E Ziegler, Catherine Crockford
Primates maintain a variety of social relationships and these can have fitness consequences. Research has established that different types of social relationships are unpinned by different or interacting hormonal systems, for example, the neuropeptide oxytocin influences social bonding, the steroid hormone testosterone influences dominance relationships, and paternal care is characterized by high oxytocin and low testosterone. Although the oxytocinergic system influences social bonding, it can support different types of social bonds in different species, whether pair bonds, parent-offspring bonds or friendships...
March 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28232065/effects-of-repeated-pup-exposure-on-behavioral-neural-and-adrenocortical-responses-to-pups-in-male-california-mice-peromyscus-californicus
#20
Nathan D Horrell, Juan P Perea-Rodriguez, Breanna N Harris, Wendy Saltzman
In biparental mammals, the factors facilitating the onset of male parental behavior are not well understood. While hormonal changes in fathers may play a role, prior experience with pups has also been implicated. We evaluated effects of prior exposure to pups on paternal responsiveness in the biparental California mouse (Peromyscus californicus). We analyzed behavioral, neural, and corticosterone responses to pups in adult virgin males that were interacting with a pup for the first time, adult virgin males that had been exposed to pups 3 times for 20min each in the previous week, and new fathers...
March 3, 2017: Hormones and Behavior
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