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Motivational states and learning

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https://www.readbyqxmd.com/read/27884551/resting-state-abnormalities-in-heroin-dependent-individuals
#1
REVIEW
Niki Pandria, Leda Kovatsi, Ana B Vivas, Panagiotis D Bamidis
Drug addiction is a major health problem worldwide. Recent neuroimaging studies have shed light into the underlying mechanisms of drug addiction as well as its consequences to the human brain. The most vulnerable, to heroin addiction, brain regions have been reported to be specific prefrontal, parietal, occipital, and temporal regions, as well as, some subcortical regions. The brain regions involved are usually linked with reward, motivation/drive, memory/learning, inhibition as well as emotional control and seem to form circuits that interact with each other...
November 21, 2016: Neuroscience
https://www.readbyqxmd.com/read/27881123/reflective-practice-and-its-role-in-facilitating-creative-responses-to-dilemmas-within-clinical-communication-a-qualitative-analysis
#2
Gabriele Lutz, Gudrun Roling, Bettina Berger, Friedrich Edelhäuser, Christian Scheffer
BACKGROUND: Good communication is a major factor in delivering high quality in care. Research indicates that current communication skills training alone might not sufficiently enable students to find context-specific creative solutions to individual complex personal and interpersonal challenges in the clinical context. This study explores medical students' experiences with real communication dilemmas in a facilitated group setting. The aims were to gain a better understanding of whether and, if so, how reflective practice can enhance students' ability to find creative individual solutions in difficult communication situations and to identify factors within the reflective setting that foster their creative competency...
November 24, 2016: BMC Medical Education
https://www.readbyqxmd.com/read/27837333/individual-differences-in-food-cue-responsivity-are-associated-with-acute-and-repeated-cocaine-induced-vocalizations-but-not-cue-induced-vocalizations
#3
Jordan A Tripi, Micheal L Dent, Paul J Meyer
RATIONALE: Individuals prone to attribute incentive salience to food-associated stimuli ("cues") are also more sensitive to cues during drug seeking and drug taking. This may be due in part to a difference in sensitivity to the affective or other stimulus properties of the drug. In rats, these properties are associated with 50-kHz ultrasonic vocalizations (USVs), in that they are elicited during putative positive affective and motivational states, including in response to drugs of abuse...
November 11, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27803652/goal-directed-behavior-and-instrumental-devaluation-a-neural-system-level-computational-model
#4
Francesco Mannella, Marco Mirolli, Gianluca Baldassarre
Devaluation is the key experimental paradigm used to demonstrate the presence of instrumental behaviors guided by goals in mammals. We propose a neural system-level computational model to address the question of which brain mechanisms allow the current value of rewards to control instrumental actions. The model pivots on and shows the computational soundness of the hypothesis for which the internal representation of instrumental manipulanda (e.g., levers) activate the representation of rewards (or "action-outcomes", e...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27783863/hpa-axis-interactions-with-behavioral-systems
#5
Amy E B Packard, Ann E Egan, Yvonne M Ulrich-Lai
Perhaps the most salient behaviors that individuals engage in involve the avoidance of aversive experiences and the pursuit of pleasurable experiences. Engagement in these behaviors is regulated to a significant extent by an individual's hormonal milieu. For example, glucocorticoid hormones are produced by the hypothalamic-pituitary-adrenocortical (HPA) axis, and influence most aspects of behavior. In turn, many behaviors can influence HPA axis activity. These bidirectional interactions not only coordinate an individual's physiological and behavioral states to each other, but can also tune them to environmental conditions thereby optimizing survival...
September 15, 2016: Comprehensive Physiology
https://www.readbyqxmd.com/read/27777128/learning-about-activity-and-understanding-nutrition-for-child-health-launch-rationale-design-and-implementation-of-a-randomized-clinical-trial-of-a-family-based-pediatric-weight-management-program-for-preschoolers
#6
Lori J Stark, Stephanie Spear Filigno, Christopher Bolling, Megan B Ratcliff, Jessica C Kichler, Shannon L Robson, Stacey L Simon, Mary Beth McCullough, Lisa M Clifford, Cathleen O Stough, Cynthia Zion, Richard F Ittenbach
Obesity affects nearly 2 million preschool age children in the United States and is not abating. However, research on interventions for already obese preschoolers is limited. To address this significant gap in the literature, we developed an intervention targeting obesity reduction in 2 to 5year olds, Learning about Activity and Understanding Nutrition for Child Health (LAUNCH). This paper describes the rationale, design, participant enrollment, and implementation of a 3-arm randomized, parallel-group clinical trial comparing LAUNCH to a motivational-interviewing intervention (MI) and standard care (STC), respectively...
October 21, 2016: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/27775913/unsupervised-topic-hypergraph-hashing-for-efficient-mobile-image-retrieval
#7
Lei Zhu, Jialie Shen, Liang Xie, Zhiyong Cheng
Hashing compresses high-dimensional features into compact binary codes. It is one of the promising techniques to support efficient mobile image retrieval, due to its low data transmission cost and fast retrieval response. However, most of existing hashing strategies simply rely on low-level features. Thus, they may generate hashing codes with limited discriminative capability. Moreover, many of them fail to exploit complex and high-order semantic correlations that inherently exist among images. Motivated by these observations, we propose a novel unsupervised hashing scheme, called topic hypergraph hashing (THH), to address the limitations...
October 21, 2016: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/27764214/evidence-that-illness-compatible-cues-are-rewarding-in-women-recovered-from-anorexia-nervosa-a-study-of-the-effects-of-dopamine-depletion-on-eye-blink-startle-responses
#8
Caitlin B O'Hara, Alexandra Keyes, Bethany Renwick, Katrin E Giel, Iain C Campbell, Ulrike Schmidt
In anorexia nervosa (AN), motivational salience is attributed to illness-compatible cues (e.g., underweight and active female bodies) and this is hypothesised to involve dopaminergic reward circuitry. We investigated the effects of reducing dopamine (DA) transmission on the motivational processing of AN-compatible cues in women recovered from AN (AN REC, n = 17) and healthy controls (HC, n = 15). This involved the acute phenylalanine and tyrosine depletion (APTD) procedure and a startle eye-blink modulation (SEM) task...
2016: PloS One
https://www.readbyqxmd.com/read/27747818/it-s-not-what-you-expect-feedback-negativity-is-independent-of-reward-expectation-and-affective-responsivity-in-a-non-probabilistic-task
#9
Jonathan M Highsmith, Karl L Wuensch, Tuan Tran, Alexandra J Stephenson, D Erik Everhart
ERP studies commonly utilize gambling-based reinforcement tasks to elicit feedback negativity (FN) responses. This study used a pattern learning task in order to limit gambling-related fallacious reasoning and possible affective responses to gambling, while investigating relationships between the FN components between high and low reward expectation conditions. Eighteen undergraduates completed measures of reinforcement sensitivity, trait and state affect, and psychophysiological recording. The pattern learning task elicited a FN component for both high and low win expectancy conditions, which was found to be independent of reward expectation and showed little relationship with task and personality variables...
April 18, 2016: Brain Informatics
https://www.readbyqxmd.com/read/27736881/forgetting-in-reinforcement-learning-links-sustained-dopamine-signals-to-motivation
#10
Ayaka Kato, Kenji Morita
It has been suggested that dopamine (DA) represents reward-prediction-error (RPE) defined in reinforcement learning and therefore DA responds to unpredicted but not predicted reward. However, recent studies have found DA response sustained towards predictable reward in tasks involving self-paced behavior, and suggested that this response represents a motivational signal. We have previously shown that RPE can sustain if there is decay/forgetting of learned-values, which can be implemented as decay of synaptic strengths storing learned-values...
October 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27728875/different-contribution-of-glucocorticoids-in-the-basolateral-amygdala-to-the-formation-and-expression-of-opiate-withdrawal-associated-memories
#11
Daniel García-Pérez, Szilamer Ferenczi, Krisztina J Kovács, M Luisa Laorden, M Victoria Milanés, Cristina Núñez
Drug-withdrawal aversive memories generate a motivational state leading to compulsive drug taking, with plasticity changes in the basolateral amygdala (BLA) being essential in aversive motivational learning. The conditioned-place aversion (CPA) paradigm allows for measuring the negative affective component of drug withdrawal. First, CPA triggers association between negative affective consequences of withdrawal with context (memory consolidation). Afterwards, when the animals are re-exposed to the paired environment, they avoid it due to the association between the context and aversive memories (memory retrieval)...
September 28, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27725799/loss-of-catecholaminergic-neuromodulation-of-persistent-forms-of-hippocampal-synaptic-plasticity-with-increasing-age
#12
Hannah Twarkowski, Denise Manahan-Vaughan
Neuromodulation by means of the catecholaminergic system is a key component of motivation-driven learning and behaviorally modulated hippocampal synaptic plasticity. In particular, dopamine acting on D1/D5 receptors and noradrenaline acting on beta-adrenergic receptors exert a very potent regulation of forms of hippocampal synaptic plasticity that last for very long-periods of time (>24 h), and occur in conjunction with novel spatial learning. Antagonism of these receptors not only prevents long-term potentiation (LTP) and long-term depression (LTD), but prevents the memory of the spatial event that, under normal circumstances, leads to the perpetuation of these plasticity forms...
2016: Frontiers in Synaptic Neuroscience
https://www.readbyqxmd.com/read/27717938/experience-of-using-hippotherapy-in-complex-effects-on-muscle-spirals-in-children-with-spastic-forms-of-cerebral-palsy
#13
Evhen Y Strashko, Аnna A Kapustianska, Lyudmyla E Bobyreva
Matters of physical and medical rehabilitation of children with organic lesions of the nervous system, in particular, with cerebral palsy, are actual in countries around the world. Hippotherapy is neurophysiologically oriented therapy using horses. Determine whether a combination of hippotherapy as a method of rehabilitation in the aftermath of outpatient comprehensive impact on MS on a stationary phase; Study of the effect of hippotherapy as securing and preparation method for learning new postures and movements in children with spastic cerebral palsy forms; The study of the possible optimization of psychophysical state, activation motivations of patients; Determination of the optimal timing of hippotherapy sessions, the number of procedures, the study of possible fatigue factor children...
2016: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/27716859/friendship-operationalizing-the-intangible-to-improve-friendship-based-outcomes-for-individuals-with-autism-spectrum-disorder
#14
Erinn H Finke
Purpose: Individuals with autism spectrum disorder (ASD) have social deficits that affect making and maintaining friends. Many empirically tested methods to address these social deficits are available, yet difficulties related to the establishment and maintenance of authentic friendships persist. Method: This viewpoint article (a) briefly reviews the current state of the science relative to social and friendship skills training for individuals with ASD, (b) considers the potential links (or lack thereof) between current social and friendship skill interventions for individuals with ASD and outcomes related to making and maintaining friends, (c) examines how friendship-related outcomes might be maximized, and (d) proposes a framework for intervention planning that may promote these valued outcomes...
November 1, 2016: American Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/27681153/political-economy-of-decentralising-hiv-and-aids-treatment-services-to-primary-healthcare-facilities-in-three-nigerian-states
#15
Chinyere Mbachu, Obinna Onwujekwe, Nkoli Ezumah, Olayinka Ajayi, Olusola Sanwo, Benjamin Uzochukwu
Decentralisation is defined as the dispersion, distribution or transfer of resources, functions and decision-making power from a central authority to regional and local authorities. It is usually accompanied by assignment of accountability and responsibility for results. Fundamental to understanding decentralisation is learning what motivates central governments to give up power and resources to local governments, and the practical significance of this on their positions regarding decentralisation. This study examined key political and institutional influences on role-players' capacity to support decentralisation of HIV and AIDS treatment services to primary healthcare facilities, and implications for sustainability...
September 2016: African Journal of AIDS Research: AJAR
https://www.readbyqxmd.com/read/27678418/using-foreign-virtual-patients-with-medical-students-in-germany-are-cultural-differences-evident-and-do-they-impede-learning
#16
Jens Walldorf, Tina Jähnert, Norman B Berman, Martin R Fischer
BACKGROUND: Learning with virtual patients (VPs) is considered useful in medical education for fostering clinical reasoning. As the authoring of VPs is highly demanding, an international exchange of cases might be desirable. However, cultural differences in foreign VPs might hamper learning success. OBJECTIVE: We investigated the need for support for using VPs from the United States at a German university, with respect to language and cultural differences. Our goal was to better understand potential implementation barriers of a intercultural VP exchange...
2016: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/27676221/detection-of-mild-traumatic-brain-injury-by-machine-learning-classification-using-resting-state-functional-network-connectivity-and-fractional-anisotropy
#17
Victor M Vergara, Andrew R Mayer, Eswar Damaraju, Kent A Kiehl, Vince Calhoun
Traumatic brain injury (TBI) may adversely affect a person's thinking, memory, personality, and behavior. While mild TBI (mTBI) diagnosis is challenging, there is a risk for long-term psychiatric, neurologic, and psychosocial problems in some patients that motivates the search for new and better biomarkers. Recently, diffusion magnetic resonance imaging (dMRI) has shown promise in detecting mTBI, but its validity is still being investigated. Resting state functional network connectivity (rsFNC) is another approach that is emerging as a promising option for the diagnosis of mTBI...
November 21, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27628300/cigarette-smoking-and-depression-comorbidity-systematic-review-and-proposed-theoretical-model
#18
REVIEW
Amanda R Mathew, Lee Hogarth, Adam M Leventhal, Jessica W Cook, Brian Hitsman
BACKGROUND AND AIMS: Despite decades of research on co-occurring smoking and depression, cessation rates remain consistently lower for depressed smokers than for smokers in the general population, highlighting the need for theory-driven models of smoking and depression. This paper provides a systematic review with a particular focus upon psychological states that disproportionately motivate smoking in depression, and frame an incentive learning theory account of smoking-depression co-occurrence...
September 15, 2016: Addiction
https://www.readbyqxmd.com/read/27614948/the-experimental-analysis-of-the-interruptive-interfering-and-identity-distorting-effects-of-chronic-pain
#19
Johan W S Vlaeyen, Stephen Morley, Geert Crombez
Pain is an unpleasant sensory and emotional experience urging the individual to take action to restore the integrity of the body. The transition from a common episode of acute pain to a state of intermittent or chronic pain has been a constant preoccupation of researchers and clinicians alike. In this review, we approach chronic pain from a modern learning perspective that incorporates cognitive, affective, behavioral and motivational aspects. We view pain as a biologically hard-wired signal of bodily harm that competes with other demands in the person's environment...
November 2016: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/27613004/moral-learning-as-intuitive-theory-revision
#20
Marjorie Rhodes, Henry Wellman
We argue that moral learning, like much of conceptual development more generally, involves development and change in children's intuitive theories of the world. Children's intuitive theories involve coherent and abstract representations of the world, which point to domain-specific, unobservable causal-explanatory entities. From this perspective, children rely on intuitive sociological theories (in particular, an abstract expectation that group memberships constrain people's obligations), and their intuitive psychological theories (including expectations that mental states motivate individual behavior) to predict, explain, and evaluate morally-relevant action...
September 6, 2016: Cognition
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