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https://www.readbyqxmd.com/read/28214730/risk-aversion-and-religious-behaviour-analysis-using-a-sample-of-danish-twins
#1
Jytte Seested Nielsen, Mickael Bech, Kaare Christensen, Astrid Kiil, Niels Christian Hvidt
Economics offers an analytical framework to consider human behaviour including religious behaviour. Within the realm of Expected Utility Theory, religious belief and activity could be interpreted as an insurance both for current life events and for afterlife rewards. Based on that framework, we would expect that risk averse individuals would demand a more generous protection plan which they may do by devoting more effort and resources into religious activities such as church attendance and prayer, which seems to be in accordance with previous empirical results...
February 12, 2017: Economics and Human Biology
https://www.readbyqxmd.com/read/28214679/estradiol-is-a-critical-regulator-of-food-reward-behavior
#2
Jennifer E Richard, Lorena López-Ferreras, Rozita H Anderberg, Kajsa Olandersson, Karolina P Skibicka
Food intake is reduced by estrogenic hormones, levels of which vary throughout life and fluctuate throughout the ovarian cycle in females. However, estrogens have also been shown to increase reward derived from drugs of abuse, where motivational properties of drugs and progression to addiction are potentiated by estrogens. Whether reward derived from food, and specifically motivational properties of food, are altered by estrogens remains unknown. Here we investigated the effect of the estrous cycle on food reward behavior and show estrous cycle dictated variability in food motivation, measured by progressive ratio operant conditioning, in female rats...
January 28, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28213443/changes-in-appetitive-associative-strength-modulates-nucleus-accumbens-but-not-orbitofrontal-cortex-neuronal-ensemble-excitability
#3
Joseph Ziminski, Sabine Hessler, Gabriella Margetts-Smith, Meike C Sieburg, Hans S Crombag, Eisuke Koya
Cues that predict the availability of food rewards influence motivational states and elicit food-seeking behaviors. If a cue no longer predicts food availability, animals may adapt accordingly by inhibiting food seeking responses. Sparsely activated sets of neurons, coined neuronal ensembles, have been shown to encode the strength of reward-cue associations. While alterations in intrinsic excitability have been shown to underlie many learning and memory processes, little is known about these properties specifically on cue-activated neuronal ensembles...
February 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28213203/ghrelin-s-control-of-food-reward-and-body-weight-in-the-lateral-hypothalamic-area-is-sexually-dimorphic
#4
Lorena López-Ferreras, Jennifer E Richard, Rozita H Anderberg, Fredrik H Nilsson, Kajsa Olandersson, Scott E Kanoski, Karolina P Skibicka
Ghrelin is a stomach-produced hormone that stimulates ingestive behavior and increases motivated behavior to obtain palatable foods. Ghrelin receptors (growth hormone secretagogue receptors; Ghsr) are expressed in the lateral hypothalamic area (LHA), and LHA-targeted ghrelin application increases ingestive behavior in male rodents. However, the effects of LHA ghrelin signaling in females are unexplored. Here we investigated whether LHA ghrelin signaling is necessary and sufficient for control of ingestive and motivated behavior for food in male and female rats...
February 14, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28212947/affective-valence-of-neurons-in-the-vicinity-of-the-rat-amygdala-single-unit-activity-in-response-to-a-conditioned-behavior-and-vocal-sound-playback
#5
Hiroko Kagawa, Yoshimasa Seki, Kazuo Okanoya
We recorded single unit activity within and around the rat amygdala while rats were engaged in an operant task (which included both reward and aversive trials) and during playback of ultrasonic vocalizations (USVs) to determine if there existed neurons which responded to two different types of either positive contexts (i.e., water reward and positively associated 50kHz vocalizations) or negative contexts (i.e., white noise and negatively associated 22kHz vocalizations). Ultimately, we wanted to determine if these two contexts (operant condition task and vocal sounds) could be represented as either positive or negative in a single neuron...
February 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28212944/acute-and-long-term-effects-of-adolescent-methylphenidate-on-decision-making-and-dopamine-receptor-mrna-expression-in-the-orbitofrontal-cortex
#6
Leslie R Amodeo, Eliza Jacobs-Brichford, Matthew S McMurray, Jamie D Roitman
Though commonly used as a treatment for ADHD, the psychostimulant methylphenidate (MPH) is also misused and abused in adolescence in both clinical and general populations. Although MPH acts via pathways activated by other drugs of abuse, the short- and long-term effects of MPH on reward processing in learning and decision-making are not clearly understood. We examined the effect of adolescent MPH treatment on a battery of reward-directed behaviors both in adolescence during its administration and in adulthood after its discontinuation...
February 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28212873/temperament-and-character-personality-dimensions-in-nitrate-tilt-induced-vasovagal-syncope-patients
#7
Vincenzo Russo, Ahmed AlTurki, Anna Rago, Riccardo Proietti, Guillaume Chaussé, Alessio Maria Monteleone, Pasquale Scognamiglio, Palmiero Monteleone, Gerardo Nigro
INTRODUCTION: Vasovagal syncope (VVS) is a clinical syndrome characterized by transient loss of consciousness and postural tone that is due to a temporary and spontaneously self-terminating global cerebral hypoperfusion. It is known that personality modulates the individual's sensitivity to stressors, and emotional arousal and psychologic uncertainty are conditions contributing to vasodepressor syncope. Therefore it is postulated that personality characteristics of VVS patients could have a role in the pathophysiology of VVS...
February 14, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28212600/persistence-of-social-inequalities-in-modern-welfare-states-explanation-of-a-paradox
#8
Johan P Mackenbach
AIMS: Social-epidemiological explanations of health inequalities usually take the existence of social inequality as a given and ignore the fundamental questions of why social inequality exists in the first place and why it is so persistent. I review here theories of the explanation of social inequality to identify the processes and/or structures responsible for its persistence. METHODS: This paper is a review of the relevant sociological literature. RESULTS: The sociological literature suggests that what persists over long periods of time is not a specific manifestation of social inequality but a 'meta-phenomenon': the fact that there are different social positions, that these social positions give access to different levels of resources in some graded way and that the distribution of individuals over social positions follows rules that create inequalities in the opportunities for achieving a more advantaged social position...
March 2017: Scandinavian Journal of Public Health
https://www.readbyqxmd.com/read/28212464/oxytocin-reduces-ethanol-self-administration-in-mice
#9
Courtney E King, William C Griffin, Lauryn N Luderman, Malcolm M Kates, Jacqueline F McGinty, Howard C Becker
BACKGROUND: Excessive ethanol consumption remains an important health concern and effective treatments are lacking. The central oxytocin system has emerged as a potentially important therapeutic target for alcohol and drug addiction. These studies tested the hypothesis that oxytocin reduces ethanol consumption. METHODS: Male C57BL/6J mice were given access to ethanol (20% v/v) using a model of binge-like drinking ("drinking-in-the-dark") that also included the use of lickometer circuits to evaluate the temporal pattern of intake as well as 2-bottle choice drinking in the home cage...
February 17, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28212425/job-satisfaction-and-determinant-factors-among-midwives-working-at-health-facilities-in-addis-ababa-city-ethiopia
#10
Eyasu Tamru Bekru, Amsale Cherie, Antehun Alemayehu Anjulo
BACKGROUND: Midwives are the primary source of care and support for mothers and newborns at the most vulnerable time in their lives.The Ethiopian National Reproductive Health Strategy targeted reduction of Maternal Mortality rate to 267/100,000 live births in the years 2006-2015. Midwives play a crucial role in the care of pregnant women, from the first antenatal visit right through to the delivery and the postpartum period. METHODOLOGY: Institution based cross-sectional study was carried out from March 2015 to April 2015 in Addis Ababa city, Ethiopia to assess job satisfaction and its determinants among midwives working at government health facilities...
2017: PloS One
https://www.readbyqxmd.com/read/28212422/probability-matching-in-perceptrons-effects-of-conditional-dependence-and-linear-nonseparability
#11
Michael R W Dawson, Maya Gupta
Probability matching occurs when the behavior of an agent matches the likelihood of occurrence of events in the agent's environment. For instance, when artificial neural networks match probability, the activity in their output unit equals the past probability of reward in the presence of a stimulus. Our previous research demonstrated that simple artificial neural networks (perceptrons, which consist of a set of input units directly connected to a single output unit) learn to match probability when presented different cues in isolation...
2017: PloS One
https://www.readbyqxmd.com/read/28211841/predictors-of-employment-status-among-adults-with-autism-spectrum-disorder
#12
Alisha Ohl, Mira Grice Sheff, Sarah Little, Jamie Nguyen, Kelly Paskor, Aliza Zanjirian
BACKGROUND: In the United States, adults with Autism Spectrum Disorder (ASD) experience high rates of unemployment and underemployment in relation to adults with other disabilities and the general population. Yet there is little research examining their employment experiences and the predictors of employment status. OBJECTIVE: The purpose of this study was to examine the employment characteristics and histories of both employed and unemployed adults with ASD, and the factors that contributed to their employment status...
February 17, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28211496/the-use-of-bright-and-dark-types-of-humour-is-rooted-in-the-brain
#13
Ilona Papousek, Willibald Ruch, Christian Rominger, Elisabeth Kindermann, Katharina Scheidl, Günter Schulter, Andreas Fink, Elisabeth M Weiss
The ways in which humour can be used are related to the manifold interpersonal functions humour can serve, some of which are positive, and some negative. In the present study, phasic changes in the functional coupling of prefrontal and posterior cortex (EEG coherence) during other people's auditory displays of happy and sad mood were recorded to predict people's typical use of humour in social interactions. Greater use of benevolent humour, the intentions of which are in keeping with the characteristics of "laughing-with" humour, was associated with greater decreases of prefrontal-posterior coupling during the processing of happy laughter...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28210998/on-t%C3%AF-he-distinction-between-value-driven-attention-and-selection-history-evidence-from-individuals-with-depressive-symptoms
#14
Brian A Anderson, Michelle Chiu, Michelle M DiBartolo, Stephanie L Leal
When predictive of extrinsic reward as targets, stimuli rapidly acquire the ability to automatically capture attention. Attentional biases for former targets of visual search also can develop without reward feedback but typically require much longer training. These learned biases towards former targets often are conceptualized within a single framework and might differ merely in degree. That is, both are the result of the reinforcement of selection history, with extrinsic reward for correct report of the target providing greater reinforcement than correct report alone...
February 16, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28210781/adolescent-cocaine-exposure-enhances-goal-tracking-behavior-and-impairs-hippocampal-cell-genesis-selectively-in-adult-bred-low-responder-rats
#15
M Julia García-Fuster, Aram Parsegian, Stanley J Watson, Huda Akil, Shelly B Flagel
RATIONALE: Environmental challenges during adolescence, such as drug exposure, can cause enduring behavioral and molecular changes that contribute to life-long maladaptive behaviors, including addiction. Selectively bred high-responder (bHR) and low-responder (bLR) rats represent a unique model for assessing the long-term impact of adolescent environmental manipulations, as they inherently differ on a number of addiction-related traits. bHR rats are considered "addiction-prone," whereas bLR rats are "addiction-resilient," at least under baseline conditions...
February 16, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28209979/fractionating-impulsivity-neuropsychiatric-implications
#16
REVIEW
Jeffrey W Dalley, Trevor W Robbins
The ability to make decisions and act quickly without hesitation can be advantageous in many settings. However, when persistently expressed, impulsive decisions and actions are considered risky, maladaptive and symptomatic of such diverse brain disorders as attention-deficit hyperactivity disorder, drug addiction and affective disorders. Over the past decade, rapid progress has been made in the identification of discrete neural networks that underlie different forms of impulsivity - from impaired response inhibition and risky decision making to a profound intolerance of delayed rewards...
February 17, 2017: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/28209978/a-distributed-hierarchical-and-recurrent-framework-for-reward-based-choice
#17
REVIEW
Laurence T Hunt, Benjamin Y Hayden
Many accounts of reward-based choice argue for distinct component processes that are serial and functionally localized. In this Opinion article, we argue for an alternative viewpoint, in which choices emerge from repeated computations that are distributed across many brain regions. We emphasize how several features of neuroanatomy may support the implementation of choice, including mutual inhibition in recurrent neural networks and the hierarchical organization of timescales for information processing across the cortex...
February 17, 2017: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/28209759/revisiting-seed-and-soil-examining-the-primary-tumor-and-cancer-cell-foraging-in-metastasis
#18
Amber E de Groot, Sounak Roy, Joel S Brown, Kenneth J Pienta, Sarah R Amend
Metastasis is the consequence of a cancer cell that disperses from the primary tumor, travels throughout the body, and invades and colonizes a distant site.  Based on Paget's 1889 hypothesis, the majority of modern metastasis research focuses on the properties of the metastatic "seed and soil," but the implications of the primary tumor "soil" have been largely neglected. The rare lethal metastatic "seed" arises as a result of the selective pressures in the primary tumor. Optimal foraging theory describes how cancer cells adopt a mobile foraging strategy to balance predation risk and resource reward...
February 16, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28209737/gaba-cells-in-the-central-nucleus-of-the-amygdala-promote-cataplexy
#19
Matthew B Snow, Jimmy J Fraigne, Gabrielle Thibault-Messier, Victoria L Chuen, Aren Thomasian, Richard L Horner, John Peever
Cataplexy is a hallmark of narcolepsy characterized by the sudden uncontrollable onset of muscle weakness or paralysis during wakefulness. It can occur spontaneously, but is typically triggered by positive emotions such as laughter. Although cataplexy was identified over 130 years ago, its neural mechanism remains unclear. Here, we show that a newly identified GABA circuit within the central nucleus of the amygdala (CeA) promotes cataplexy. We used behavioral, electrophysiological, immunohistochemical, and chemogenetic strategies to selectively target and manipulate CeA activity in narcoleptic (orexin(-/-) ) mice to determine its functional role in controlling cataplexy...
February 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28209520/deconstructing-empathy-neuroanatomical-dissociations-between-affect-sharing-and-prosocial-motivation-using-a-patient-lesion-model
#20
Suzanne M Shdo, Kamalini G Ranasinghe, Kelly A Gola, Clinton J Mielke, Paul V Sukhanov, Bruce L Miller, Katherine P Rankin
Affect sharing and prosocial motivation are integral parts of empathy that are conceptually and mechanistically distinct. We used a neurodegenerative disease (NDG) lesion model to more directly examine the neural correlates of these two aspects of real-world empathic responding. The study enrolled 275 participants, including 44 healthy older controls and 231 patients diagnosed with one of five neurodegenerative diseases (75 Alzheimer's disease, 58 behavioral variant frontotemporal dementia (bvFTD), 42 semantic variant primary progressive aphasia (svPPA), 28 progressive supranuclear palsy, and 28 non-fluent variant (nfvPPA)...
February 13, 2017: Neuropsychologia
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