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https://www.readbyqxmd.com/read/28226432/reinforcement-learning-for-stabilizing-an-inverted-pendulum-naturally-leads-to-intermittent-feedback-control-as-in-human-quiet-standing
#1
Kenjiro Michimoto, Yasuyuki Suzuki, Ken Kiyono, Yasushi Kobayashi, Pietro Morasso, Taishin Nomura, Kenjiro Michimoto, Yasuyuki Suzuki, Ken Kiyono, Yasushi Kobayashi, Pietro Morasso, Taishin Nomura, Ken Kiyono, Pietro Morasso, Kenjiro Michimoto, Yasushi Kobayashi, Yasuyuki Suzuki, Taishin Nomura
Intermittent feedback control for stabilizing human upright stance is a promising strategy, alternative to the standard time-continuous stiffness control. Here we show that such an intermittent controller can be established naturally through reinforcement learning. To this end, we used a single inverted pendulum model of the upright posture and a very simple reward function that gives a certain amount of punishments when the inverted pendulum falls or changes its position in the state space. We found that the acquired feedback controller exhibits hallmarks of the intermittent feedback control strategy, namely the action of the feedback controller is switched-off intermittently when the state of the pendulum is located near the stable manifold of the unstable saddle-type upright equilibrium of the inverted pendulum with no active control: this action provides an opportunity to exploit transiently converging dynamics toward the unstable upright position with no help of the active feedback control...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223097/the-roles-of-the-orbitofrontal-cortex-via-the-habenula-in-non-reward-and-depression-and-in-the-responses-of-serotonin-and-dopamine-neurons
#2
Edmund T Rolls
Cortical regions such as the orbitofrontal cortex involved in reward and in non-reward and which are implicated in depression, and the amygdala, are connected to the habenula via the striatum and pallidum, and via subcortical limbic structures. The habenula in turn projects to the raphe nuclei, the source of the serotonin-containing neurons that project to the forebrain. It is proposed that this provides a route for cortical signals related to reward, and to not obtaining expected rewards, to influence the serotonin-containing neuronal system that is influenced by many antidepressant treatments...
February 14, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28221079/cue-induced-food-seeking-after-punishment-is-associated-with-increased-fos-expression-in-the-lateral-hypothalamus-and-basolateral-and-medial-amygdala
#3
Erin J Campbell, David J Barker, Helen M Nasser, Konstantin Kaganovsky, Christopher V Dayas, Nathan J Marchant
In humans, relapse to unhealthy eating habits following dieting is a significant impediment to obesity treatment. Food-associated cues are one of the main triggers of relapse to unhealthy eating during self-imposed abstinence. Here we report a behavioral method examining cue-induced relapse to food seeking following punishment-induced suppression of food taking. We trained male rats to lever press for food pellets that were delivered after a 10-s conditional stimulus (CS) (appetitive). Following training, 25% of reinforced lever presses resulted in the presentation of a compound stimulus consisting of a novel CS (aversive) and the appetitive CS followed by a pellet and footshock...
February 20, 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/28220867/other-regarding-attention-focus-modulates-third-party-altruistic-choice-an-fmri-study
#4
Bastian David, Yang Hu, Frank Krüger, Bernd Weber
Third-party altruistic decision-making has been shown to be modulated by other-regarding attention (e.g., focusing on the offender's crime or the victim's situation especially in judicial judgment). However, the neural mechanisms underlying this modulation remain poorly understood. In this fMRI study, participants voluntarily decided if they wanted to punish the first-party offender or help the second-party victim using their own monetary endowment in an unfair context. Particularly, before deciding they were asked to focus on the (un)fairness of the offender proposing the offer (offender-focused block, OB), the feeling of the victim receiving this offer (victim-focused block, VB), or without any specific focus (baseline block, BB)...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28214772/i-could-have-done-otherwise-availability-of-counterfactual-comparisons-informs-the-sense-of-agency
#5
Eugenia Kulakova, Nima Khalighinejad, Patrick Haggard
Personal control and agency are closely associated with the counterfactual notion that a person could have done otherwise (CDO). In both philosophy and law, this counterfactual evaluation determines responsibility and punishment, yet little is known about its influence on agents' experience during action. We used a risky decision-making task to study how counterfactual evaluations influenced participants' sense of agency. Two factors were manipulated independently: the presence/absence of counterfactual comparisons between actions and the presence/absence of counterfactual comparisons between outcomes of these actions...
February 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28209377/how-do-parents-label-their-physical-disciplinary-practices-a-focus-on-the-definition-of-corporal-punishment
#6
Sabrina Fréchette, Elisa Romano
The lack of consensus about the definition of corporal punishment (CP) contributes to the varying research findings and fuels the debate surrounding its use. Related to the problem of definitional variability is also the possibility that some parents may not be aware that their physical disciplinary strategies (PDS) are forms of CP. As a first step to move beyond the debate and to tailor educational efforts to change cultural norms and parents' behaviors, the objective of the current study was to clarify what parents self-label as CP...
February 13, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28205567/opposing-effects-of-reward-and-punishment-on-human-vigor
#7
Benjamin Griffiths, Ulrik R Beierholm
The vigor with which humans and animals engage in a task is often a determinant of the likelihood of the task's success. An influential theoretical model suggests that the speed and rate at which responses are made should depend on the availability of rewards and punishments. While vigor facilitates the gathering of rewards in a bountiful environment, there is an incentive to slow down when punishments are forthcoming so as to decrease the rate of punishments, in conflict with the urge to perform fast to escape punishment...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28202205/american-parents-attitudes-and-beliefs-about-corporal-punishment-an-integrative-literature-review
#8
Ellen M Chiocca
Research on American parents' beliefs about the use of corporal punishment (CP) shows widespread approval of this child-rearing practice. This review integrated 25 research articles to gain a better understanding of what American parents believe about the use of CP as a method of child-rearing, where they get their information about CP, and if American parents' beliefs about CP translate to the actual use of CP. The results showed that the main factors that influence a parent's endorsement of CP is the belief that CP is normative and expected when raising a child; is a necessary part of parenting, even for infants; and that certain stressors involving interactions between the parent, child, and environment can elicit the use of CP...
February 12, 2017: Journal of Pediatric Health Care
https://www.readbyqxmd.com/read/28202158/conservative-protestantism-and-attitudes-toward-corporal-punishment-1986-2014
#9
John P Hoffmann, Christopher G Ellison, John P Bartkowski
Research indicates that conservative Protestants are highly supportive of corporal punishment. Yet, Americans' support for this practice has waned during the past several decades. This study aggregates repeated cross-sectional data from the General Social Surveys (GSS) to consider three models that address whether attitudes toward spanking among conservative Protestants shifted relative to those of other Americans from 1986 to 2014. Although initial results reveal a growing gap between conservative Protestants and the broader American public, we find that average levels of support have remained most robust among less educated conservative Protestants, with some erosion among more highly educated conservative Protestants...
March 2017: Social Science Research
https://www.readbyqxmd.com/read/28197009/jainism-its-relevance-to-psychiatric-practice-with-special-reference-to-the-practice-of-sallekhana
#10
Ottilingam Somasundaram, A G Tejus Murthy, D Vijaya Raghavan
Jainism is one of the oldest religions of India. Since the founding of the religion, Jainism has given prominence to Sallekhana, death by ritual fasting facing north, as exemplified in the deaths of Bhadrabahu and Chandragupta Maurya. The controversy whether this religious form of starvation is related to suicide is debated since the time of the early Jain teachers. History is replete with instances where kings and warriors who have failed in their duty punish themselves for their sin and welcome death as expiation...
October 2016: Indian Journal of Psychiatry
https://www.readbyqxmd.com/read/28196108/post-traumatic-stress-disorder-symptom-burden-and-gender-each-affect-generalization-in-a-reward-and-punishment-learning-task
#11
Milen L Radell, Kevin D Beck, Mark W Gilbertson, Catherine E Myers
Post-traumatic stress disorder (PTSD) can develop following exposure to a traumatic event. Re-experiencing, which includes intrusive memories or flashbacks of the trauma, is a core symptom cluster of PTSD. From an associative learning perspective, this cluster may be attributed to cues associated with the trauma, which have come to elicit symptoms in a variety of situations encountered in daily life due to a tendency to overgeneralize. Consistent with this, prior studies have indicated that both individuals with clinically diagnosed with PTSD, and those with self-reported symptoms who may not meet full diagnostic criteria, show changes in generalization...
2017: PloS One
https://www.readbyqxmd.com/read/28193130/religious-coping-and-types-and-sources-of-information-used-in-making-prostate-cancer-treatment-decisions
#12
Janice V Bowie, Caryn N Bell, Altovise Ewing, Ballington Kinlock, Ashley Ezema, Roland J Thorpe, Thomas A LaVeist
Treatment experiences for prostate cancer survivors can be challenging and dependent on many clinical and psychosocial factors. One area that is less understood is the information needs and sources men utilize. Among these is the influence of religion as a valid typology and the value it may have on treatment decisions. The objective of this study was to assess the relationship between race, religion, and cancer treatment decisions in African American men compared with White men. Data were from the Diagnosis and Decisions in Prostate Cancer Treatment Outcomes Study that consisted of 877 African American and White men...
February 1, 2017: American Journal of Men's Health
https://www.readbyqxmd.com/read/28191986/studies-of-learned-helplessness-in-honey-bees-apis-mellifera-ligustica
#13
Christopher W Dinges, Christopher A Varnon, Lisa D Cota, Stephen Slykerman, Charles I Abramson
The current study reports 2 experiments investigating learned helplessness in the honey bee (Apis mellifera ligustica). In Experiment 1, we used a traditional escape method but found the bees' activity levels too high to observe changes due to treatment conditions. The bees were not able to learn in this traditional escape procedure; thus, such procedures may be inappropriate to study learned helplessness in honey bees. In Experiment 2, we used an alternative punishment, or passive avoidance, method to investigate learned helplessness...
February 13, 2017: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/28190701/parental-perception-and-factors-associated-with-treatment-strategies-for-primary-nocturnal-enuresis
#14
Thomson T Tai, Brent T Tai, Yu-Jun Chang, Kuo-Hsuan Huang
OBJECTIVE: The aim was to investigate the factors influencing parents seeking reasonable managements for their child and their overall outlook toward primary nocturnal enuresis (PNE). STUDY DESIGN: We recruited 93 children with PNE from enuresis clinics and requested their parents to complete questionnaires regarding their child's medical history and behavior, their methods for coping with PNE, and their perception of enuresis. Logistic regression models were applied to investigate factors influencing the parents to adopt a positive approach toward enuresis and to subsequently seek a medical consultation...
January 30, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28187166/human-punishment-is-not-primarily-motivated-by-inequality
#15
Jesse Marczyk
Previous theorizing about punishment has suggested that humans desire to punish inequality per se. However, the research supporting such an interpretation contains important methodological confounds. The main objective of the current experiment was to remove those confounds in order to test whether generating inequality per se is punished. Participants were recruited from an online market to take part in a wealth-alteration game with an ostensible second player. The participants were given an option to deduct from the other player's payment as punishment for their behavior during the game...
2017: PloS One
https://www.readbyqxmd.com/read/28185881/the-association-between-endogenous-testosterone-level-and-behavioral-flexibility-in-young-men-evidence-from-stimulus-outcome-reversal-learning
#16
Esther K Diekhof, Susanne Kraft
The capacity to flexibly adapt responding to unexpected changes in the environment is crucial for survival. Several neurotransmitters have been implicated in stimulus-outcome reversal learning. Yet, it remains an open question whether inter-individual differences in the neuroactive hormone testosterone may also be related to this type of behavioral flexibility. In this study we assessed the association between endogenous testosterone level and reversal learning in young healthy men. We used an observer reversal learning task, in which subjects viewed computer-based decisions between two stimuli, of which one was currently rewarded while the other one was punished...
February 6, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28185670/the-relationship-between-childhood-sexual-abuse-and-mental-health-outcomes-among-males-results-from-a-nationally-representative-united-states-sample
#17
Sarah Turner, Tamara Taillieu, Kristene Cheung, Tracie O Afifi
BACKGROUND: Few studies have examined the associations between childhood sexual abuse (CSA), co-occurrence with other types of maltreatment and adult mental health outcomes, specifically among males. The objectives of this study were to: 1) determine the prevalence of males who have experienced a) childhood maltreatment without CSA; b) CSA without other forms of childhood maltreatment; and c) CSA along with other forms of childhood maltreatment; and 2) determine the relationship between CSA among males and mood, anxiety, substance and personality disorders and suicide attempts...
February 6, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28184070/the-legal-and-moral-perceptions-of-clinical-and-non-clinical-undergraduates-regarding-substance-use-a-pilot-project
#18
J Puryer, A Rowley, J Saimbi, A Waylen
Introduction Heavy alcohol and illicit drug use has been documented amongst medical and dental professionals and educational programs have been developed to attempt to reduce such behaviour in clinical undergraduates. This pilot study aims to investigate the legal and moral perceptions of substance use in clinical and non-clinical undergraduates.Method A cross-sectional self-report questionnaire was administered to 107 clinical and non-clinical undergraduates to investigate their moral and legal perceptions of alcohol and illicit substance use...
February 10, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28183402/the-effects-of-acute-inflammation-on-cognitive-functioning-and-emotional-processing-in-humans-a-systematic-review-of-experimental-studies
#19
REVIEW
Jessica Bollen, Leanne Trick, David Llewellyn, Chris Dickens
OBJECTIVE: The cognitive neuropsychological model of depression proposes that negative biases in the processing of emotionally salient information have a central role in the development and maintenance of depression. We have conducted a systematic review to determine whether acute experimental inflammation is associated with changes to cognitive and emotional processing that are thought to cause and maintain depression. METHODS: We identified experimental studies in which healthy individuals were administered an acute inflammatory challenge (bacterial endotoxin/vaccination) and standardised tests of cognitive function were performed...
March 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/28182529/sleepy-punishers-are-harsh-punishers
#20
Kyoungmin Cho, Christopher M Barnes, Cristiano L Guanara
The degree of punishment assigned to criminals is of pivotal importance for the maintenance of social order and cooperation. Nonetheless, the amount of punishment assigned to transgressors can be affected by factors other than the content of the transgressions. We propose that sleep deprivation in judges increases the severity of their sentences. We took advantage of the natural quasi-manipulation of sleep deprivation during the shift to daylight saving time in the spring and analyzed archival data from judicial punishment handed out in the U...
February 2017: Psychological Science
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