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Negative reinforcement

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https://www.readbyqxmd.com/read/28071747/deficits-in-reinforcement-learning-but-no-link-to-apathy-in-patients-with-schizophrenia
#1
Matthias N Hartmann-Riemer, Steffen Aschenbrenner, Magdalena Bossert, Celina Westermann, Erich Seifritz, Philippe N Tobler, Matthias Weisbrod, Stefan Kaiser
Negative symptoms in schizophrenia have been linked to selective reinforcement learning deficits in the context of gains combined with intact loss-avoidance learning. Fundamental mechanisms of reinforcement learning and choice are prediction error signaling and the precise representation of reward value for future decisions. It is unclear which of these mechanisms contribute to the impairments in learning from positive outcomes observed in schizophrenia. A recent study suggested that patients with severe apathy symptoms show deficits in the representation of expected value...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070254/the-efficacy-of-contingency-management-on-cocaine-craving-using-prize-based-reinforcement-of-abstinence-in-cocaine-users
#2
Bijan Pirnia, Seyed Kazem Rasoulzadeh Tabatabaei, Abbas Tavallaii, Ali Akbar Soleimani, Kambiz Pirnia
INTRODUCTION: Contingency management (CM) is one of the most common therapies in the domain of drug addiction. This study has been carried out with the purpose of evaluating the efficacy of contingency management intervention. METHOD: In an experimental design, between December 15, 2014 and November 20, 2015, fifty men (between 18 and 31 with an average age of 24.6) with a history of cocaine use, were selected voluntarily and were randomly assigned into two groups of CM and control group...
November 2016: Electronic Physician
https://www.readbyqxmd.com/read/28069895/brassinosteroid-induced-transcriptional-repression-and-dephosphorylation-dependent-protein-degradation-negatively-regulate-bin2-interacting-aif2-a-br-signaling-negative-regulator-bhlh-transcription-factor
#3
Yoon Kim, Ji-Hye Song, Seon-U Park, You-Seung Jeong, Soo-Hwan Kim
Brassinosteroids (BRs) are plant polyhydroxy-steroids that play important roles in plant growth and development via extensive signal integration through direct interactions between regulatory components of different signaling pathways. Recent studies have shown that diverse helix-loop-helix/basic helix-loop-helix (HLH/bHLH) family proteins are actively involved in control of BR signaling pathways and interact with other signaling pathways. In this study, we show that ATBS1-INTERACTING FACTOR 2 (AIF2), a nuclear-localized atypical bHLH transcription factor, specifically interacts with BRASSINOSTEROID-INSENSITIVE 2 (BIN2) among other BR-signaling molecules...
January 9, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28053911/verruciform-xanthoma-in-the-hard-palate-a-case-report-and-literature-review
#4
Alexandre Simões Garcia, Otávio Pagin, Paulo Sérgio da Silva Santos, Denise Tostes Oliveira
Oral verruciform xanthoma (OVX) is an uncommon lesion that appears on the oral mucosa. The aim of this paper was to discuss the probable etiopathogenesis of OVX in the hard palate, reinforcing the importance of including this lesion in the differential diagnosis of verrucous lesions. A 43-year-old male smoker presented with a painless lesion with a verrucous surface and erythematous spots on the hard palate. Excisional biopsy revealed oral mucosa consisting of hyperkeratosis, acanthosis, and elongated rete pegs...
December 2016: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/28050629/antireward-compulsivity-and-addiction-seminal-contributions-of-dr-athina-markou-to-motivational-dysregulation-in-addiction
#5
REVIEW
George F Koob
RATIONALE AND OBJECTIVES: Addiction is defined as a chronically relapsing disorder characterized by compulsive drug seeking that is hypothesized to derive from multiple sources of motivational dysregulation. METHODS AND RESULTS: Dr. Athina Markou made seminal contributions to our understanding of the neurobiology of addiction with her studies on the dysregulation of reward function using animal models with construct validity. Repeated overstimulation of the reward systems with drugs of abuse decreases reward function, characterized by brain stimulation reward and presumbably reflecting dysphoria-like states...
January 3, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28045999/haplotypes-of-the-hla-g-3-untranslated-region-respond-to-endogenous-factors-of-hla-g-and-hla-g-cell-lines-differentially
#6
Isabelle Poras, Layale Yaghi, Gustavo Martelli-Palomino, Celso T Mendes-Junior, Yara Costa Netto Muniz, Natalia F Cagnin, Bibiana Sgorla de Almeida, Erick C Castelli, Edgardo D Carosella, Eduardo A Donadi, Philippe Moreau
The immune checkpoint HLA-G prevents maternal rejection of the fetus and contributes in cancer invasion and acceptance of allografts. The 5' and 3' regulatory regions of the HLA-G gene are polymorphic and balancing selection probably maintains this variability. It is proposed that nucleotide variations may affect the level of HLA-G expression. To investigate this issue we aimed to analyze how haplotypes of the 3' untranslated region (3'UTR) with highest worldwide frequencies, namely UTR-1, UTR-2, UTR-3, UTR-4, UTR-5, UTR-18 and UTR-7, impact the expression of a luciferase reporter gene in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28042705/the-role-of-pain-behaviour-and-family-caregiver-responses-in-the-link-between-pain-catastrophising-and-pain-intensity-a-moderated-mediation-model
#7
Somayyeh Mohammadi, Mohsen Dehghani, Robbert Sanderman, Mariët Hagedoorn
OBJECTIVES: This study investigated the mediating role of pain behaviours in the association between pain catastrophising and pain intensity and explored the moderating role of family caregivers' responses to pain in the link between pain behaviours and pain intensity. METHODS: The sample consisted of 154 chronic pain patients and their family caregivers. Patients completed questionnaires regarding pain intensity, pain catastrophising, pain behaviours and their caregivers' responses to their pain...
January 1, 2017: Psychology & Health
https://www.readbyqxmd.com/read/28040431/overshadowing-depends-on-cue-and-reinforcement-sensitivity-but-not-schizotypy
#8
Clare Pickett, Helen J Cassaday, Peter A Bibby
There is evidence for impaired selective learning mechanisms in individuals high in schizotypy. Overshadowing provides a direct test of selective learning based on cue salience and has previously been reported to be impaired in relation to schizotypy scores. The present study tested for overshadowing using food allergy and Lego construction task variants. Both variants used the same number of conditioned stimulus (CS) cues and the same number of learning trials. CS cues were trained in compound pairs or in isolation and overshadowing was subsequently tested on trials followed by negative versus positive outcomes...
December 28, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/28040324/metabolomics-and-lipidomics-analyses-by-1-h-nuclear-magnetic-resonance-of-schizophrenia-patient-serum-reveal-potential-peripheral-biomarkers-for-diagnosis
#9
Ljubica Tasic, João G M Pontes, Michelle S Carvalho, Guilherme Cruz, Carolines Dal Mas, Sumit Sethi, Mariana Pedrini, Lucas B Rizzo, Maiara Zeni-Graiff, Elson Asevedo, Acioly L T Lacerda, Rodrigo A Bressan, Ronei Jesus Poppi, Elisa Brietzke, Mirian A F Hayashi
Using (1)H NMR-based metabolomics in association to chemometrics analysis, we analyzed here the metabolic differences between schizophrenia patients (SCZ) compared to healthy controls (HCs). HCs and SCZ patients underwent clinical interview using the Structured Clinical Interview for DSM Disorders (SCID). SCZ patients were further assessed by Positive and Negative Syndrome Scale (PANSS), Calgary Depression Scale, Global Assessment of Functioning Scale (GAF), and Clinical Global Impressions Scale (CGI). Using the principal component analysis (PCA) and supervised partial least-squares discriminate analysis (PLS-DA) in obtained NMR data, a clear group separation between HCs and SCZ patients was achieved...
December 28, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/28039229/the-role-of-diastolic-stress-testing-in-the-evaluation-for-hfpef-a-simultaneous-invasive-echocardiographic-study
#10
Masaru Obokata, Garvan C Kane, Yogesh N V Reddy, Thomas P Olson, Vojtech Melenovsky, Barry A Borlaug
BACKGROUND: -Diagnosis of heart failure (HF) with preserved ejection fraction (HFpEF) is challenging and relies largely on demonstration of elevated cardiac filling pressures (pulmonary capillary wedge pressure, PCWP). Current guidelines recommend use of natriuretic peptides (NT-proBNP) and rest/exercise echocardiography (E/e' ratio) to make this determination. Data to support this practice is conflicting. METHODS: -Simultaneous echocardiographic-catheterization studies were prospectively conducted at rest and during exercise in subjects with invasively-proven HFpEF (n=50) and participants with dyspnea but no identifiable cardiac pathology (n=24)...
December 30, 2016: Circulation
https://www.readbyqxmd.com/read/28031302/a-review-of-10-years-of-vasectomy-programming-and-research-in-low-resource-settings
#11
REVIEW
Dominick Shattuck, Brian Perry, Catherine Packer, Dawn Chin Quee
Vasectomy is a highly effective and safe contraceptive method for couples who want to stop childbearing, but only 2.4% of men around the world use this method. We conducted an extensive review of the vasectomy research literature and programmatic reports, published between April 2005 and April 2015, to synthesize barriers and facilitators to vasectomy adoption. Of the more than 230 documents initially retrieved in our search, we ultimately included 75 documents in our review and synthesized the findings according to the Supply-Enabling Environment-Demand (SEED) Programming Model...
December 23, 2016: Global Health, Science and Practice
https://www.readbyqxmd.com/read/28027230/use-of-poly-4-hydroxybutyrate-mesh-to-optimize-soft-tissue-support-in-mastopexy-a-single-site-study
#12
William P Adams, Arikha C Moses
BACKGROUND: The ptotic breast is surgically rejuvenated through a mastopexy procedure. Recurrent ptosis or other negative changes to the breast shape are not uncommon following mastopexy, as the tissue laxity and skin quality that contributed to ptosis are not surgically corrected. The purpose of this study was to assess the postsurgical changes in the breasts of patients who underwent a primary mastopexy procedure with soft-tissue reinforcement using a long-term poly-4-hydroxybutyrate resorbable scaffold (i...
January 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28025973/lateral-habenula-involvement-in-impulsive-cocaine-seeking
#13
Agustin Zapata, Eun-Kyung Hwang, Carl R Lupica
The Lateral Habenula (LHb) is a brain structure receiving inputs from limbic forebrain areas and innervating major midbrain monoaminergic nuclei. Evidence indicates LHb involvement in sleep control, reward-based decision making, avoidance of punishment, and responses to stress. Additional work has established that the LHb mediates negative feedback in response to aversive events. Since a hallmark of drug addiction is the inability to limit drug use despite negative consequences, we hypothesize that LHb dysfunction may play a role in the lack of control over drug seeking...
December 27, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28018898/economic-costs-associated-with-motorbike-accidents-in-kathmandu-nepal
#14
Diksha Sapkota, Bihungum Bista, Shiva Raj Adhikari
BACKGROUND: Road traffic accidents, considered as global tragedies, are in increasing trend; however, the safety situation is very severe in developing countries incurring substantial amount of human, economic, and social costs. Motorcycle crashes, the commonest form, occur mostly in economically active population. However, there is limited number of studies on economic burden of motorcycle crashes. This study aims to estimate the total cost and disability-adjusted life years (DALYs) lost due to motorbike accidents among victims of Kathmandu Valley...
2016: Frontiers in Public Health
https://www.readbyqxmd.com/read/28018206/the-role-of-multiple-neuromodulators-in-reinforcement-learning-that-is-based-on-competition-between-eligibility-traces
#15
Marco A Huertas, Sarah E Schwettmann, Harel Z Shouval
The ability to maximize reward and avoid punishment is essential for animal survival. Reinforcement learning (RL) refers to the algorithms used by biological or artificial systems to learn how to maximize reward or avoid negative outcomes based on past experiences. While RL is also important in machine learning, the types of mechanistic constraints encountered by biological machinery might be different than those for artificial systems. Two major problems encountered by RL are how to relate a stimulus with a reinforcing signal that is delayed in time (temporal credit assignment), and how to stop learning once the target behaviors are attained (stopping rule)...
2016: Frontiers in Synaptic Neuroscience
https://www.readbyqxmd.com/read/28008556/associations-of-affective-responses-during-free-living-physical-activity-and-future-physical-activity-levels-an-ecological-momentary-assessment-study
#16
Yue Liao, Chih-Ping Chou, Jimi Huh, Adam Leventhal, Genevieve Dunton
PURPOSE: Affective response during physical activity may influence motivation to perform future physical activity behavior. However, affective response during physical activity is often assessed under controlled laboratory conditions. The current study used ecological momentary assessment (EMA) to capture affective responses during free-living physical activity performed by adults, and determined whether these affective responses predict future moderate-to-vigorous physical activity (MVPA) levels after 6 and 12 months...
December 22, 2016: International Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28007761/functional-%C3%AE-opioid-galanin-receptor-heteromers-in-the-ventral-tegmental-area
#17
Estefanía Moreno, César Quiroz, William Rea, Ning-Sheng Cai, Josefa Mallol, Antoni Cortés, Carme Lluís, Enric I Canela, Vicent Casadó, Sergi Ferré
: The neuropeptide galanin has been shown to interact with the opioid system. More specifically, galanin counteracts the behavioral effects of the systemic administration of μ-opioid receptor (MOR) agonists. Yet the mechanism responsible for this galanin-opioid interaction has remained elusive. Using biophysical techniques in mammalian transfected cells we found evidence for selective heteromerization of MOR and the galanin receptor subtype Gal1 (Gal1R). Also in transfected cells, a synthetic peptide selectively disrupted MOR-Gal1R heteromerization as well as specific interactions between MOR and Gal1R ligands: a negative crosstalk, by which galanin counteracted MAPK activation induced by the endogenous MOR agonist endomorphin-1, and a cross-antagonism, by which a MOR antagonist counteracted MAPK activation induced by galanin...
December 22, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28007490/gut-brain-nutrient-sensing-in-food-reward
#18
Ari Shechter, Gary J Schwartz
For the past several decades, vagal and hormonal gut-brain negative feedback signaling mechanisms that promote satiety and subsequent suppression of food intake have been explored. In addition, a separate positive feedback process termed "appetition," involving postoral signaling from the gut to the brain, has been shown to promote food intake and produce flavor-nutrient preference conditioning. Afferent fibers emerging from the vagus nerve form the main pathway by which information is relayed from the abdominal viscera to the hindbrain and eventually other higher brain regions involved in food intake...
December 20, 2016: Appetite
https://www.readbyqxmd.com/read/28001276/effects-of-prematurity-on-language-acquisition-and-auditory-maturation-a-systematic-review
#19
Inaê Costa Rechia, Luciéle Dias Oliveira, Anelise Henrich Crestani, Eliara Pinto Vieira Biaggio, Ana Paula Ramos de Souza
Purpose: To verify which damages prematurity causes to hearing and language. Research strategies: We used the decriptors language/linguagem, hearing/audição, prematurity/prematuridade in databases LILACS, MEDLINE, Cochrane Library and Scielo. Selection criteria: randomized controlled trials, non-randomized intervention studies and descriptive studies (cross-sectional, cohort, case-control projects). Data analysis: The articles were assessed independently by two authors according to the selection criteria...
November 2016: CoDAS
https://www.readbyqxmd.com/read/27997912/analysis-of-the-indicating-value-of-cardiac-troponin-i-tumor-necrosis-factor-%C3%AE-interleukin-18-mir-1-and-mir-146b-for-viral-myocarditis-among-children
#20
Dahui Wang, Taijun Li, Hongjie Cui, Yanming Zhang
BACKGROUND/AIMS: The primary objective of this study is to evaluate the diagnosis effect of serum protein factors and microRNAs for children suffering from viral myocarditis (VMC). METHODS: The expression levels of serum cardiac troponin I (cTnI), interleukin-18 (IL-18) and tumor necrosis factor-α (TNF-α) in both VMC and control groups were examined by using the Elisa Kit. The expression levels of miR-1 and miR-146b were measured through RT-PCR. Subsequently, the Receiver Operating Characteristic (ROC) curves were drawn based on the diagnostic results of VMC...
2016: Cellular Physiology and Biochemistry
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