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https://www.readbyqxmd.com/read/29331802/hair-cortisol-and-work-stress-importance-of-workload-and-stress-model-jdcs-or-eri
#1
Leander van der Meij, Nikkie Gubbels, Jaap Schaveling, Mercedes Almela, Mark van Vugt
Hair cortisol concentrations (HCCs) are a potential physiological indicator of work related stress. However, studies that tested the relationship between HCC and self-reported stress in a work setting show mixed findings. This may be because few studies used worker samples that experience prolonged stress. Therefore, we compared a high workload sample (n = 81) and a normal workload sample (n = 91) and studied whether HCC was related to: (i) high job demands, low control, and low social support (JDCS model), and (ii) high effort, low reward, and high overcommitment (ERI model)...
December 26, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29331800/nucleus-accumbens-mu-opioid-receptors-regulate-context-specific-social-preferences-in-the-juvenile-rat
#2
Caroline J W Smith, Kevin B Wilkins, Sara Li, Maxwell T Tulimieri, Alexa H Veenema
The μ opioid receptor (MOR) in the nucleus accumbens (NAc) is involved in assigning pleasurable, or hedonic value to rewarding stimuli. Importantly, the hedonic value of a given rewarding stimulus likely depends on an individual's current motivational state. Here, we examined the involvement of MORs in the motivation to interact with a novel or a familiar (cage mate) conspecific in juvenile rats. First, we demonstrated that the selective MOR antagonist CTAP administered into the NAc reduces social novelty preference of juvenile males, by decreasing the interaction time with the novel conspecific and increasing the interaction time with the cage mate...
December 30, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29331446/intolerance-of-uncertainty-neural-and-psychophysiological-correlates-of-the-perception-of-uncertainty-as-threatening
#3
REVIEW
Ema Tanovic, Dylan G Gee, Jutta Joormann
Intolerance of uncertainty (IU) reflects the perception of uncertainty as threatening, regardless of the true probability of threat. IU is elevated in various forms of psychopathology, uniquely associated with anxiety and depression symptoms after controlling for related constructs, and prospectively predicts symptoms. Given the ubiquity of uncertainty in daily life and the clinical implications of IU, recent work has begun to investigate the neural and psychophysiological correlates of IU. This review summarizes the existing literature and integrates findings within a mechanistic neural model of responding to uncertainty...
January 6, 2018: Clinical Psychology Review
https://www.readbyqxmd.com/read/29330488/motor-skill-learning-and-reward-consumption-differentially-affect-vta-activation
#4
Susan Leemburg, Tara Canonica, Andreas Luft
Dopamine release from the ventral tegmental area (VTA) terminals in the primary motor cortex (M1) enables motor skill acquisition. Here, we test the hypothesis that dopaminergic VTA neurons projecting to M1 are activated when rewards are obtained during motor skill acquisition, but not during task execution at plateau performance, or by rewards obtained without performing skilled movements. Rats were trained to perform a skilled reaching task for 3 days (acquisition) or 7 days (plateau). In combination with retrograde labelling of VTA-to-M1 projection neurons, double immunofluorescence for c-fos and tyrosine hydroxylase (TH) was used to assess activation of dopaminergic and non-dopaminergic VTA neurons...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330137/the-intersection-of-stress-and-reward-bnst-modulation-of-aversive-and-appetitive-states
#5
REVIEW
Sarah Ch'ng, Jingjing Fu, Robyn M Brown, Stuart J McDougall, Andrew J Lawrence
The bed nucleus of the stria terminalis (BNST) is widely acknowledged as a brain structure that regulates stress and anxiety states, as well as aversive and appetitive behaviours. The diverse roles of the BNST are afforded by its highly modular organisation, neurochemical heterogeneity, and complex intrinsic and extrinsic circuitry. There has been growing interest in the BNST in relation to psychopathologies such as anxiety and addiction. Although research on the human BNST is still in its infancy, there have been extensive preclinical studies examining the molecular signature and hodology of the BNST and their involvement in stress and reward seeking behaviour...
January 9, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29329692/potential-psychological-neural-mechanisms-in-binge-eating-disorder-implications-for-treatment
#6
REVIEW
Hedy Kober, Rebecca G Boswell
Binge Eating Disorder (BED) is a newly-established eating disorder diagnosis in the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). Although systematic research on BED is in its infancy and many studies feature small samples, several observations emerge. First, we review diagnostic, developmental, and socio-demographic features of BED. Next, although BED and obesity are linked and frequently co-occur, we review data suggesting that BED is a distinct phenotype. Importantly, we take a mechanism-focused approach and propose four psychological processes with neurobiological bases that may uniquely differentiate BED from obesity: emotion reactivity, food-cue reactivity, food craving, and cognitive control...
December 23, 2017: Clinical Psychology Review
https://www.readbyqxmd.com/read/29329417/effects-of-alcohol-cues-on-mrs-glutamate-levels-in-the-anterior-cingulate
#7
Hu Cheng, Derek Kellar, Allison Lake, Peter Finn, George V Rebec, Shalmali Dharmadhikari, Ulrike Dydak, Sharlene Newman
Growing evidence suggests that glutamate neurotransmission plays a critical role in alcohol addiction. Cue-induced change of glutamate has been observed in animal studies but never been investigated in humans. This work investigates cue-induced change in forebrain glutamate in individuals with alcohol use disorder (AUD). A total of 35 subjects (17 individuals with AUD and 18 healthy controls) participated in this study. The glutamate concentration was measured with single-voxel 1H-MR spectroscopy at the dorsal anterior cingulate...
January 10, 2018: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/29328997/synthesis-biological-evaluation-and-molecular-modeling-of-novel-thienopyrimidinone-and-triazolothienopyrimidinone-derivatives-as-dual-anti-inflammatory-antimicrobial-agents
#8
Adnan A Bekhit, Ahmed M Farghaly, Ragab M Shafik, Mona M A Elsemary, Alaa El-Din A Bekhit, Aida A Guemei, Mai S El-Shoukrofy, Tamer M Ibrahim
New thienopyrimidinone and triazolothienopyrimidinone derivatives have been synthesized. These compounds were subjected to anti-inflammatory and antimicrobial activity screening aiming to identify new candidates that have dual anti-inflammatory and antimicrobial activities. Compounds 5, 7 and 10a showed minimal ulcerogenic effect and high selectivity towards human recombinant COX-2 over COX-1 enzyme. Their docking outcome correlated with their biological activity and assured the high selectivity binding towards COX-2...
January 4, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29326273/spatial-representations-of-self-and-other-in-the-hippocampus
#9
Teruko Danjo, Taro Toyoizumi, Shigeyoshi Fujisawa
An animal's awareness of its location in space depends on the activity of place cells in the hippocampus. How the brain encodes the spatial position of others has not yet been identified. We investigated neuronal representations of other animals' locations in the dorsal CA1 region of the hippocampus with an observational T-maze task in which one rat was required to observe another rat's trajectory to successfully retrieve a reward. Information reflecting the spatial location of both the self and the other was jointly and discretely encoded by CA1 pyramidal cells in the observer rat...
January 12, 2018: Science
https://www.readbyqxmd.com/read/29326098/cognitive-and-behavioral-skills-exercises-completed-by-patients-with-major-depression-during-smartphone-cognitive-behavioral-therapy-secondary-analysis-of-a-randomized-controlled-trial
#10
Toshi A Furukawa, Masaru Horikoshi, Hirokazu Fujita, Naohisa Tsujino, Ran Jinnin, Yuki Kako, Sei Ogawa, Hirotoshi Sato, Nobuki Kitagawa, Yoshihiro Shinagawa, Yoshio Ikeda, Hissei Imai, Aran Tajika, Yusuke Ogawa, Tatsuo Akechi, Mitsuhiko Yamada, Shinji Shimodera, Norio Watanabe, Masatoshi Inagaki, Akio Hasegawa
BACKGROUND: A strong and growing body of evidence has demonstrated the effectiveness of cognitive behavioral therapy (CBT), either face-to-face, in person, or as self-help via the Internet, for depression. However, CBT is a complex intervention consisting of several putatively effective components, and how each component may or may not contribute to the overall effectiveness of CBT is poorly understood. OBJECTIVE: The aim of this study was to investigate how the users of smartphone CBT use and benefit from various components of the program...
January 11, 2018: JMIR Mental Health
https://www.readbyqxmd.com/read/29325757/the-role-of-fatty-acids-and-their-endocannabinoid-like-derivatives-in-the-molecular-regulation-of-appetite
#11
REVIEW
Renger F Witkamp
Intake, absorption and synthesis of fatty acids, including those produced by the intestinal microbiota are tightly monitored via specific receptors and, indirectly through their conversion into a variety of signalling molecules. The resulting information is integrated and translated to different physiological processes, including the regulation of appetite and satiation. Direct chemosensing of fatty acids takes place via interaction with free fatty acid (FFA) and other receptors. These are present in the oronasal cavity and along the entire gastrointestinal tract, in various other tissues, and, for some receptors also in brain...
January 8, 2018: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29325557/bidirectional-associations-between-mothers-feeding-practices-and-child-eating-behaviours
#12
Elena Jansen, Kate E Williams, Kimberley M Mallan, Jan M Nicholson, Lynne A Daniels
BACKGROUND: This study examined bidirectional relationships between maternal feeding practices and child food responsiveness and satiety responsiveness from 2 to 5 years. METHODS: Mothers (N = 207) reported their own feeding practices and child eating behaviours using validated questionnaires at child ages 2, 3.7, and 5 years. Cross-lagged analyses were conducted to test for bidirectional effects, adjusting for child BMI z-score (based on measured weight and height) at 14 months...
January 11, 2018: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/29324862/taking-two-to-tango-fmri-analysis-of-improvised-joint-action-with-physical-contact
#13
Léa A S Chauvigné, Michel Belyk, Steven Brown
Many forms of joint action involve physical coupling between the participants, such as when moving a sofa together or dancing a tango. We report the results of a novel two-person functional MRI study in which trained couple dancers engaged in bimanual contact with an experimenter standing next to the bore of the magnet, and in which the two alternated between being the leader and the follower of joint improvised movements. Leading showed a general pattern of self-orientation, being associated with brain areas involved in motor planning, navigation, sequencing, action monitoring, and error correction...
2018: PloS One
https://www.readbyqxmd.com/read/29324797/sex-dependent-impact-of-early-life-stress-and-adult-immobilization-in-the-attribution-of-incentive-salience-in-rats
#14
Silvia Fuentes, Javier Carrasco, Abigail Hatto, Juan Navarro, Antonio Armario, Manel Monsonet, Jordi Ortiz, Roser Nadal
Early life stress (ELS) induces long-term effects in later functioning and interacts with further exposure to other stressors in adulthood to shape our responsiveness to reward-related cues. The attribution of incentive salience to food-related cues may be modulated by previous and current exposures to stressors in a sex-dependent manner. We hypothesized from human data that exposure to a traumatic (severe) adult stressor will decrease the attribution of incentive salience to reward-associated cues, especially in females, because these effects are modulated by previous ELS...
2018: PloS One
https://www.readbyqxmd.com/read/29324640/heart-rate-variability-frequency-domain-alterations-among-healthy-nurses-exposed-to-prolonged-work-stress
#15
Rossana Borchini, Giovanni Veronesi, Matteo Bonzini, Francesco Gianfagna, Oriana Dashi, Marco Mario Ferrario
The deregulation of the autonomic nervous system assessed through the heart rate variability (HRV) analysis is a promising pathway linking work stress and cardiovascular diseases. We aim to investigate the associations between HRV High Frequency (HF) and Low Frequency (LF) powers and work stress in a sample of 36 healthy nurses. Perceived work stress was assessed twice one year apart, using the Job Content and Effort Reward Imbalance questionnaires. This allows to classify nurses in three exposure groups: "prolonged high stress" (PHS), "recent high stress" (RHS) and "stable low stress" (SLS)...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29324369/early-life-social-stress-and-resting-state-functional-connectivity-in-postpartum-rat-anterior-cingulate-circuits
#16
Benjamin C Nephew, Marcelo Febo, Wei Huang, Luis M Colon-Perez, Laurellee Payne, Guillaume L Poirier, Owen Greene, Jean A King
INTRODUCTION: Continued development and refinement of resting state functional connectivity (RSFC) fMRI techniques in both animal and clinical studies has enhanced our comprehension of the adverse effects of stress on psychiatric health. The objective of the current study was to assess both maternal behavior and resting state functional connectivity (RSFC) changes in these animals when they were dams caring for their own young. It was hypothesized that ECSS exposed dams would express depressed maternal care and exhibit similar (same networks), yet different specific changes in RSFC (different individual nuclei) than reported when they were adult females...
January 2, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29324299/boys-with-conduct-problems-and-callous-unemotional-traits-neural-response-to-reward-and-punishment-and-associations-with-treatment-response
#17
Amy L Byrd, Samuel W Hawes, Jeffrey D Burke, Rolf Loeber, Dustin A Pardini
Abnormalities in reward and punishment processing are implicated in the development of conduct problems (CP), particularly among youth with callous-unemotional (CU) traits. However, no studies have examined whether CP children with high versus low CU traits exhibit differences in the neural response to reward and punishment. A clinic-referred sample of CP boys with high versus low CU traits (ages 8-11; n = 37) and healthy controls (HC; n = 27) completed a fMRI task assessing reward and punishment processing...
December 15, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/29323519/pigeons-in-control-of-their-actions-learning-and-performance-in-stop-signal-and-change-signal-tasks
#18
Christina Meier, Stephen E G Lea, Ian P L McLaren
In human participants, 2 paradigms commonly assumed to measure the executive-control processes involved in response inhibition are the stop-signal and change-signal tasks. There is, however, also considerable evidence that performance in these tasks can be mediated by associative processes. To assess which components of inhibitory response control might be associative, we developed analogues of these tasks for pigeons. We trained pigeons to peck quickly at 1 of 2 keys of different colors to obtain a food reward...
January 2018: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/29323515/suboptimal-choice-reward-predictive-signals-and-temporal-information
#19
Paul J Cunningham, Timothy A Shahan
Suboptimal choice refers to preference for an alternative offering a low probability of food (suboptimal alternative) over an alternative offering a higher probability of food (optimal alternative). Numerous studies have found that stimuli signaling probabilistic food play a critical role in the development and maintenance of suboptimal choice. However, there is still much debate about how to characterize how these stimuli influence suboptimal choice. There is substantial evidence that the temporal information conveyed by a food-predictive signal governs its function as both a Pavlovian conditioned stimulus and as an instrumental conditioned reinforcer...
January 2018: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/29323504/protective-behavioral-strategies-mediate-the-relationship-between-behavioral-economic-risk-factors-and-alcohol-related-problems
#20
Andrew T Voss, Kathryn E Soltis, Ashley A Dennhardt, Matthew P Martens, James G Murphy
Behavioral economic measures of alcohol reward value and future orientation have received support as predictors of alcohol consumption, alcohol-related problems, and response to intervention. Protective behavioral strategies (PBS) have been shown to be a significant mediator between a variety of risk factors and alcohol-related problems. The current article examines direct and mediating associations between measures of alcohol reward value (proportionate substance-related activity participation and enjoyment) and future orientation, use of PBS, and alcohol-related problems...
January 11, 2018: Experimental and Clinical Psychopharmacology
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