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Hormones and Behavior

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https://www.readbyqxmd.com/read/28803937/annual-variation-in-the-reproductive-hormone-and-behavior-rhythm-in-a-population-of-the-asian-short-toed-lark-can-spring-temperature-influence-activation-of-the-hpg-axis-of-wild-birds
#1
Shuping Zhang, Xianglong Xu, Weiwei Wang, Lidan Zhao, Lijun Gao, Wenyu Yang
Although a number of studies have demonstrated a correlation between ambient temperature and the timing of reproductive behavior in many bird species, the relationships between temperature, activation of the hypothalamus-pituitary-gonad (HPG) axis, laying, and hatching in free-living birds, remain unclear. We investigated the relationships between spring temperature, reproductive hormones, and behavior, in a population of the Asian short-toed lark (Calandrella cheleensis) on the Inner Mongolian Grasslands in 2014, 2015 and 2016...
August 10, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28720488/hormonal-correlates-of-natal-dispersal-and-rank-attainment-in-wild-male-baboons
#2
Mercy Y Akinyi, Laurence R Gesquiere, Mathias Franz, Patrick O Onyango, Jeanne Altmann, Susan C Alberts
In many mammals, maturational milestones such as dispersal and the attainment of adult dominance rank mark stages in the onset of reproductive activity and depend on a coordinated set of hormonal and socio-behavioral changes. Studies that focus on the link between hormones and maturational milestones are uncommon in wild mammals because of the challenges of obtaining adequate sample sizes of maturing animals and of tracking the movements of dispersing animals. We examined two maturational milestones in wild male baboons-adult dominance rank attainment and natal dispersal-and measured their association with variation in glucocorticoids (fGC) and fecal testosterone (fT)...
August 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28739247/difficulties-with-emotion-regulation-moderate-the-association-between-childhood-history-of-maltreatment-and-cortisol-reactivity-to-psychosocial-challenge-in-postpartum-women
#3
Gillian England-Mason, Melissa Kimber, Jennifer Khoury, Leslie Atkinson, Harriet MacMillan, Andrea Gonzalez
Exposure to child maltreatment can lead to long-term emotional difficulties and dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis. However, no prior work has examined emotion regulation as a moderator of the association between childhood history of maltreatment and cortisol response to psychosocial challenge. Amongst a sample of 140 postpartum women, associations between childhood maltreatment, emotion regulation, and cortisol response to a computerized Emotional Stroop paradigm were examined using structural equation modeling...
August 4, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28782547/early-life-stress-increases-testosterone-and-corticosterone-and-alters-stress-physiology-in-zebra-finches
#4
J Bayley Zito, Angy Hanna, Nora Kadoo, Michelle L Tomaszycki
Early life stress has enduring effects on behavior and physiology. However, the effects on hormones and stress physiology remain poorly understood. In the present study, parents of zebra finches of both sexes were exposed to an increased foraging paradigm from 3 to 33days post hatching. Plasma and brains were collected from chicks at 3 developmental time points: post hatching days 25, 60 and adulthood. Plasma was assayed for testosterone (T), estradiol (E2), and corticosterone (CORT). The paraventricular nucleus of the hypothalamus was assessed for corticotrophin releasing factor (CRH) and glucocorticoid receptor (GR) expression...
August 3, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28755980/profiling-coping-strategies-in-male-and-female-rats-potential-neurobehavioral-markers-of-increased-resilience-to-depressive-symptoms
#5
Molly Kent, Massimo Bardi, Ashley Hazelgrove, Kaitlyn Sewell, Emily Kirk, Brooke Thompson, Kristen Trexler, Brennan Terhune-Cotter, Kelly Lambert
Coping strategies have been associated with differential stress responsivity, perhaps providing a valuable neurobiological marker for susceptibility to the emergence of depressogenic symptoms or vulnerability to other anxiety-related disorders. Rats profiled with a flexible coping phenotype, for example, exhibit increased neurobiological markers of emotional regulation compared to active and passive copers (Bardi et al., 2012; Lambert et al., 2014). In the current study, responses of male and female rats to prediction errors in a spatial foraging task (dry land maze; DLM) were examined after animals were exposed to chronic unpredictable stress (CUS)...
August 3, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28760691/elevated-cortisol-awakening-response-associated-with-early-life-stress-and-impaired-executive-function-in-healthy-adult-males
#6
Kevin Butler, Kristel Klaus, Laura Edwards, Kyla Pennington
Experiencing early life stress (ELS) and subsequent dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis may play a role in the aetiology of mental health disorders. However, the exact mechanisms linking HPA-axis dysregulation with the development of psychopathology have not been fully delineated. Progress in this area is hampered by the complex and often conflicting associations found between markers of HPA-axis function and risk factors for mental health disorders such as impaired executive function (EF) and ELS...
August 2, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28754307/within-person-changes-in-salivary-testosterone-and-physical-characteristics-of-puberty-predict-boys-daily-affect
#7
Kathrin Klipker, Cornelia Wrzus, Antje Rauers, Steven M Boker, Michaela Riediger
Recent investigations highlighted the role of within-person pubertal changes for adolescents' behavior. Yet, little is known about effects on adolescents' daily affect, particularly regarding the hormonal changes underlying physical changes during puberty. In a study with 148 boys aged 10 to 20years, we tested whether within-person physical and hormonal changes over eight months predicted everyday affect fluctuations, measured with experience sampling. As expected, greater within-person changes in testosterone (but not in dehydroepiandrosterone) were associated with higher affect fluctuations in daily life...
August 2, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28778538/on-estrogenic-masculinization-of-the-human-brain-and-behavior
#8
LETTER
Severi Luoto, Markus J Rantala
No abstract text is available yet for this article.
August 1, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28774680/response-to-tops-2017
#9
LETTER
James K Rilling
No abstract text is available yet for this article.
July 31, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28765081/intranasal-oxytocin-and-a-polymorphism-in-the-oxytocin-receptor-gene-are-associated-with-human-directed-social-behavior-in-golden-retriever-dogs
#10
Mia E Persson, Agaia J Trottier, Johan Bélteky, Lina S V Roth, Per Jensen
The oxytocin system may play an important role in dog domestication from the wolf. Dogs have evolved unique human analogue social skills enabling them to communicate and cooperate efficiently with people. Genomic differences in the region surrounding the oxytocin receptor (OXTR) gene have previously been associated with variation in dogs' communicative skills. Here we have utilized the unsolvable problem paradigm to investigate the effects of oxytocin and OXTR polymorphisms on human-directed contact seeking behavior in 60 golden retriever dogs...
July 29, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28765080/activation-of-extrasynaptic-%C3%AE-gabaa-receptors-globally-or-within-the-posterior-vta-has-estrous-dependent-effects-on-consumption-of-alcohol-and-estrous-independent-effects-on-locomotion
#11
Laverne C Melón, Zachary T Nolan, Delphine Colar, Eileen M Moore, Stephen L Boehm
Recent reports support higher than expected rates of binge alcohol consumption among women and girls. Unfortunately, few studies have assessed the mechanisms underlying this pattern of intake in females. Studies in males suggest that alcohol concentrations relevant to the beginning stages of binge intoxication may selectively target tonic GABAergic inhibition mediated by GABAA receptor subtypes expressing the δ-subunit protein (δ-GABAAR). Indeed, administration of agonists that interact with these δ-GABAAR prior to alcohol access can abolish binge drinking behavior in male mice...
July 29, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28676252/a-functional-mri-study-on-how-oxytocin-affects-decision-making-in-social-dilemmas-cooperate-as-long-as-it-pays-off-aggress-only-when-you-think-you-can-win
#12
Bruno Lambert, Carolyn H Declerck, Christophe Boone, Paul M Parizel
We investigate if the neuropeptide oxytocin (OT), known to moderate social behaviour, influences strategic decision making in social dilemmas by facilitating the integration of incentives and social cues. Participants (N=29) played two economic games with different incentive structures in the fMRI scanner after receiving OT or placebo (following a double blind, within-subject design). Pictures of angry or neutral faces (the social cues) were displayed alongside the game matrices. Consistent with a priori hypotheses based on the modulatory role of OT in mesolimbic dopaminergic brain regions, the results indicate that, compared to placebo, OT significantly increases the activation of the nucleus accumbens during an assurance (coordination) game that rewards mutual cooperation...
July 28, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28757313/within-subject-effects-and-the-social-habituation-function-of-oxytocin
#13
LETTER
Mattie Tops
No abstract text is available yet for this article.
July 27, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28757312/high-paternal-testosterone-may-protect-against-postpartum-depressive-symptoms-in-fathers-but-confer-risk-to-mothers-and-children
#14
Darby E Saxbe, Christine Dunkel Schetter, Clarissa D Simon, Emma K Adam, Madeleine U Shalowitz
Following the birth of an infant, decreases in testosterone and increases in depressive symptoms have been observed in fathers. Paternal testosterone may reflect fathers' investment in pair-bonding and paternal caregiving and, as such, may be associated with maternal and familial well-being. This study tests associations between paternal testosterone, paternal and maternal postpartum depressive symptoms, and subsequent family functioning. Within 149 couples, fathers provided testosterone samples when infants were approximately nine months old and both parents reported on postpartum depressive symptoms at two, nine, and 15months postpartum...
July 27, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28712589/exposure-to-a-contextually-neutral-stressor-potentiates-fear-conditioning-in-juvenile-rainbow-trout-oncorhynchus-mykiss
#15
Brandon S Demuth, Maud C O Ferrari, Lynn P Weber, David M Janz, Douglas P Chivers
Organisms faced with stressors deploy a suite of adaptive responses in the form of behavioral, physiological and cognitive modifications to overcome the challenge. Interactive effects of these responses are known to influence learning and memory processes and facilitation is thought to be dependent, in part, upon contextual relevance of the stressor to the learning task. Predation is one such stressor for prey animals, and their ability to manage reliable information about predators is essential for adaptive antipredator strategies...
July 27, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28750755/evening-salivary-cortisol-and-alpha-amylase-at-14months-and-neurodevelopment-at-4years-sex-differences
#16
Ainara Andiarena, Nekane Balluerka, Mario Murcia, Jesús Ibarluzea, Vivette Glover, Oscar Vegas
Stress system activity in early life can have long-term effects on neurodevelopment. The main aim of this study was to assess the association of child evening salivary cortisol and alpha-amylase basal levels at 14months of age with longer-term neuropsychological development at 4years in a low-risk population-based birth cohort derived from the INMA (Environment and Childhood) project in Spain. We included 186 parent-children pairs with information on both stress system activity and neurodevelopment. Both stress markers at 14months of age showed an association with neuropsychological development at 4years...
July 26, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28729017/daily-levels-and-rhythm-in-circulating-corticosterone-and-insulin-are-altered-with-photostimulated-seasonal-states-in-night-migratory-blackheaded-buntings
#17
Ila Mishra, Devraj Singh, Vinod Kumar
The circadian rhythms are involved in the photostimulation of seasonal responses in migratory blackheaded buntings. Here, we investigated whether changes in daily levels and rhythm in corticosterone (cort) and insulin secretions were associated with transitions in the photoperiodic seasonal states. Buntings were exposed to short days to maintain the winter (photosensitive) non-migratory state, and to long days for varying durations to induce the premigratory, migratory (shown by migratory restlessness at night, Zugunruhe) and summer non-migratory (photorefractory) states...
July 25, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28734725/estrogen-receptor-alpha-is-required-in-gabaergic-but-not-glutamatergic-neurons-to-masculinize-behavior
#18
Melody V Wu, Jessica Tollkuhn
Masculinization of the altricial rodent brain is driven by estrogen signaling during a perinatal critical period. Genetic deletion of estrogen receptor alpha (Esr1/ERα) results in altered hypothalamic-pituitary-gonadal (HPG) axis signaling and a dramatic reduction of male sexual and territorial behaviors. However, the role of ERα in masculinizing distinct classes of neurons remains unexplored. We deleted ERα in excitatory or inhibitory neurons using either a Vglut2 or Vgat driver and assessed male behaviors...
July 20, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28666923/allopregnanolone-levels-and-depressive-symptoms-during-pregnancy-in-relation-to-single-nucleotide-polymorphisms-in-the-allopregnanolone-synthesis-pathway
#19
Charlotte Hellgren, Erika Comasco, Alkistis Skalkidou, Inger Sundström-Poromaa
Allopregnanolone, a neurosteroid whose levels rise throughout gestation, putatively stabilizes antenatal mood. The present study aimed to investigate associations of plasma allopregnanolone to antenatal depressive symptoms, as well as to genetic and obstetric factors. Allopregnanolone plasma levels from 284 pregnant women were measured around gestational week 18. Haplotype tag single nucleotide polymorphisms in the aldo-keto reductase family 1, members C2 and C4 (AKR1C2, AKR1C4), and steroid 5 alpha-reductase 1 and 2 (SRD5A1, and SRD5A2) genes were genotyped in a larger sample of pregnant women (n=1351)...
July 20, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28733175/probing-the-neural-circuits-of-sex-and-aggression-with-precision-genetics-commentary-on-estrogen-receptor-alpha-is-required-in-gabaergic-but-not-glutamatergic-neurons-to-masculinize-behavior-by-wu-and-tollkuhn
#20
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