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Disorder diminished motivation

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https://www.readbyqxmd.com/read/29771559/body-mass-index-across-adolescence-and-substance-use-problems-in-early-adulthood
#1
Ashley N Gearhardt, Rebecca Waller, Jennifer M Jester, Luke W Hyde, Robert A Zucker
Excessive substance use and obesity are underpinned by a number of shared risk factors (e.g., reward dysfunction, impulsivity). Food and drugs of abuse engage similar reward-related neural circuitry and the food-drug competition hypothesis proposes that excess consumption of food may diminish desire for drugs of abuse by competing for neural receptors associated with reward and motivation. Adolescence is a high-risk period for both increased substance use and excessive weight gain. In the present study, the authors tested whether, consistent with the food-drug competition hypothesis, elevated body mass index (BMI) across adolescence predicted fewer substance use problems in young adulthood...
May 2018: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/29737638/preventing-morphine-reinforcement-with-high-frequency-deep-brain-stimulation-of-the-lateral-hypothalamic-area
#2
Mojdeh Fattahi, Ghorbangol Ashabi, Seyed Morteza Karimian, Esmail Riahi
Deep brain stimulation (DBS) has been proposed as a promising intervention for patients with treatment-refractory substance use disorder. Here, we investigated if high-frequency DBS in the lateral hypothalamic area (LHA) could affect drug-induced reinforcement. Rats were bilaterally implanted with bipolar stimulation electrodes in the LHA and trained to the morphine conditioned place preference. DBS (monophasic square pulses, 130 Hz, 100-microsecond pulse duration and 150 μA) was applied during the morphine-pairing trials (30 minutes daily for 4 days) or drug-free postconditioning test (15 minutes) to determine its effect on the acquisition or expression of morphine reward, respectively...
May 8, 2018: Addiction Biology
https://www.readbyqxmd.com/read/29573379/dopamine-dysregulation-hypothesis-the-common-basis-for-motivational-anhedonia-in-major-depressive-disorder-and-schizophrenia
#3
Jan Józef Szczypiński, Mateusz Gola
Abnormalities in reward processing are crucial symptoms of major depressive disorder (MDD) and schizophrenia (SCH). Recent neuroscientific findings regarding MDD have led to conclusions about two different symptoms related to reward processing: motivational and consummatory anhedonia, corresponding, respectively, to impaired motivation to obtain rewards ('wanting'), and diminished satisfaction from consuming them ('liking'). One can ask: which of these is common for MDD and SCH. In our review of the latest neuroscientific studies, we show that MDD and SCH do not share consummatory anhedonia, as SCH patients usually have unaltered liking...
March 24, 2018: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/29423135/altered-reward-system-reactivity-for-personalized-circumscribed-interests-in-autism
#4
Gregor Kohls, Ligia Antezana, Maya G Mosner, Robert T Schultz, Benjamin E Yerys
Background: Neurobiological research in autism spectrum disorders (ASD) has paid little attention on brain mechanisms that cause and maintain restricted and repetitive behaviors and interests (RRBIs). Evidence indicates an imbalance in the brain's reward system responsiveness to social and non-social stimuli may contribute to both social deficits and RRBIs. Thus, this study's central aim was to compare brain responsiveness to individual RRBI (i.e., circumscribed interests), with social rewards (i...
2018: Molecular Autism
https://www.readbyqxmd.com/read/29230398/insulin-signaling-deficiency-produces-immobility-in-caenorhabditis-elegans-that-models-diminished-motivation-states-in-man-and-responds-to-antidepressants
#5
Julie Dagenhardt, Angeline Trinh, Halen Sumner, Jeffrey Scott, Eric Aamodt, Donard S Dwyer
Defects in insulin signaling have been reported in schizophrenia and major depressive disorder, which also share certain negative symptoms such as avolition, anhedonia, and apathy. These symptoms reflect diminished motivational states, which have been modeled in rodents as increased immobility in the forced swimming test. We have discovered that loss-of-function mutations in the insulin receptor ( daf-2 ) and syntaxin ( unc-64 ) genes in Caenorhabditis elegans , brief food deprivation, and exposure to DMSO produce immobility and avolition in non-dauer adults...
November 2017: Molecular Neuropsychiatry
https://www.readbyqxmd.com/read/29198090/-co-occurring-schizophrenia-and-substance-use-disorder-etiological-theories-and-challenges-in-israel
#6
REVIEW
Sharon Florentin, Sergey Raskin
A sizeable number of patients suffering from psychotic disorders, particularly schizophrenia, are also diagnosed with substance use disorder (SUD). These dual diagnosis (DD) patients are considered very difficult to treat and differ in some of their characteristics from patients with schizophrenia or SUD exclusively. They have a worse prognosis and require more complex treatment which needs to be integrated for both of the disorders. In Israel there is a lack of training, professionals and institutions specializing in treatment for this population...
November 2017: Harefuah
https://www.readbyqxmd.com/read/29137493/tolerance-in-internet-gaming-disorder-a-need-for-increasing-gaming-time-or-something-else
#7
Daniel L King, Madeleine C E Herd, Paul H Delfabbro
Background and aims The criterion of tolerance in DSM-5 Internet gaming disorder (IGD) refers to a need for increasing time spent gaming. However, this focus on "need for gaming time" may overlook some of the broader motivations, outcomes, or effects of gaming that underlie excessive play. This study aimed to explore regular and problematic gamers' experiences and perceptions of tolerance in IGD. Methods An online survey of 630 adult gamers yielded 1,417 text responses to open-ended questions. A thematic analysis of 23,373 words was conducted to extract dominant themes...
December 1, 2017: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/28981811/prospective-relationships-between-motivation-and-functioning-in-recovery-after-a-first-episode-of-schizophrenia
#8
Daniel Fulford, Danijela Piskulic, Jean Addington, John M Kane, Nina R Schooler, Kim T Mueser
Diminished motivation is associated with robust impairment in psychosocial functioning in schizophrenia (SZ). Little is known about the reciprocal relationships between motivation and functioning, particularly following a first episode of psychosis. We tested bidirectional associations between motivation and social and occupational functioning in the year following a first episode of SZ spectrum disorder among patients in the Recovery After an Initial Schizophrenia Episode-Early Treatment Program (RAISE-ETP) study...
February 15, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28888175/solitary-drinking-is-associated-with-specific-alcohol-problems-in-emerging-adults
#9
Matthew T Keough, Roisin M O'Connor, Sherry H Stewart
Hazardous drinking in emerging adulthood is associated with multiple domains of alcohol problems, which range in type and severity. Alcohol problems at the severe end of the spectrum (e.g., impaired control) may be early warning signs of alcohol use disorders (AUDs) among emerging adults. However, given the emphasis in the literature on predictors of overall problem risk, we still know very little about predictors of these specific (and severe) domains of alcohol problems in emerging adults. Many emerging adults drink at social events (e...
August 31, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28682229/-epigenetic-mechanisms-and-alcohol-use-disorders-a-potential-therapeutic-target
#10
Rémi Legastelois, Jérôme Jeanblanc, Catherine Vilpoux, Erika Bourguet, Mickael Naassila
Alcohol use disorder is a devastating illness with a profound health impact, and its development is dependent on both genetic and environmental factors. This disease occurs over time and requires changes in brain gene expression. There is converging evidence suggesting that the epigenetic processes may play a role in the alcohol-induced gene regulations and behavior such as the intervention of DNA methylation and histone acetylation. Histone acetylation, like histone methylation, is a highly dynamic process regulated by two classes of enzymes: histone acetyltransferases and histone deacetylases (HDACs)...
2017: Biologie Aujourd'hui
https://www.readbyqxmd.com/read/28630479/attention-cognitive-control-and-motivation-in-adhd-linking-event-related-brain-potentials-and-dna-methylation-patterns-in-boys-at-early-school-age
#11
Hartmut Heinrich, Juliane Grunitz, Valeska Stonawski, Stefan Frey, Simone Wahl, Björn Albrecht, Tamme W Goecke, Matthias W Beckmann, Johannes Kornhuber, Peter A Fasching, Gunther H Moll, Anna Eichler
In order to better understand the underpinnings of attention-deficit/hyperactivity disorder (ADHD), we targeted the relationship of attentional, cognitive control and motivational processes with DNA methylation patterns of 60 candidate genes in boys at early school age. Participants (6 to 8 years; N = 82) were selected from a German longitudinal cohort (FRANCES). ADHD-related behaviour was assessed via maternal ratings. Performance and event-related potential measures (inter alia Cue-P3 and Nogo-P3), which were recorded in a motivational go/nogo task, indicated diminished attentional orienting, reduced inhibitory response control and a larger motivational effect on performance in ADHD already at this relatively young age...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28555883/depression-symptom-dimensions-and-asymmetrical-frontal-cortical-activity-while-anticipating-reward
#12
Brady D Nelson, Ellen M Kessel, Daniel N Klein, Stewart A Shankman
Unipolar depression has been characterized as involving diminished approach motivation and reward sensitivity. A psychophysiological indicator of approach motivation involves an asymmetry in frontal EEG activity, such that greater left relative to right frontal cortical activity indicates increased approach motivation. Consistent with the perspective of reduced approach motivation tendencies, depression has been associated with decreased relative left frontal cortical activity. To date, supporting research has primarily relied on categorical diagnoses or composite symptom counts...
January 2018: Psychophysiology
https://www.readbyqxmd.com/read/28514402/-psychoemotional-and-autonomic-states-in-patients-with-cholelithiasis
#13
Ya M Vakhrushev, N A Khokhlacheva, N N Sergeeva
AIM: To investigate the psychoemotional and autonomic states of patients with biliary system diseases and to determine their significance in the development of cholelithiasis. SUBJECTS AND METHODS: A total of 396 patients with stage 1 cholelithiasis were examined. The results of hepatobiliary ultrasonography, multifractional duodenal probing, followed by macroscopic, microscopic, and biochemical examinations of bile (the total concentration of bile acids and cholesterol, by subsequently calculating the cholate-cholesterol ratio) were used to verify the diagnosis...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28456569/neural-correlates-of-cognitive-control-in-gambling-disorder-a-systematic-review-of-fmri-studies
#14
REVIEW
Lorenzo Moccia, Mauro Pettorruso, Franco De Crescenzo, Luisa De Risio, Luigi di Nuzzo, Giovanni Martinotti, Angelo Bifone, Luigi Janiri, Marco Di Nicola
Decreased cognitive control over the urge to be involved in gambling activities is a core feature of Gambling Disorder (GD). Cognitive control can be differentiated into several cognitive sub-processes pivotal in GD clinical phenomenology, such as response inhibition, conflict monitoring, decision-making, and cognitive flexibility. This article aims to systematically review fMRI studies, which investigated the neural mechanisms underlying diminished cognitive control in GD. We conducted a comprehensive literature search and collected neuropsychological and neuroimaging data investigating cognitive control in GD...
July 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28444963/the-influence-of-frontal-alpha-asymmetry-on-the-processing-of-approach-and-withdrawal-related-stimuli-a-multichannel-psychophysiology-study
#15
Dirk Adolph, Michael von Glischinski, André Wannemüller, Jürgen Margraf
The approach-withdrawal model of hemispheric activation suggests that left frontal cortical areas mediate approach, while right frontal cortical areas mediate withdrawal motivation. Within this framework, the present study investigates the association of frontal cortical asymmetry with attentional and emotional responses toward approach- and withdrawal-related emotional stimuli. Resting frontal asymmetry was measured from 43 students before they passively viewed negative, neutral, and positive emotional pictures...
April 26, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28306258/liquid-structure-of-bis-trifluoromethylsulfonyl-imide-based-ionic-liquids-assessed-by-ft-ir-spectroscopy
#16
Cassie Kimble, Christopher M Burba
Ionic liquids are a fertile and active area of research, in part, due to the unique properties these solvents offer over traditional molecular solvents. Because these properties are rooted in the fundamental ion-ion interactions that govern their liquid structure, there is a strong motivation to characterize the liquid structure of ionic liquids. Infrared spectroscopy is a standard analytical tool for assessing liquid structures, for the intramolecular vibrational modes of the ions composing the materials are often quite sensitive to their local potential energy environment...
March 29, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28114093/-cotard-s-syndrome-case-report-and-a-brief-review-of-literature
#17
REVIEW
N P Moschopoulos, S Kaprinis, J Nimatoudis
The term "Cotard's syndrome" is used to describe a number of clinical features, mostly hypochondriac and nihilistic delusions, the most characteristic of which are the ideas "I am dead" and "my internal organs do not exist". Besides, anxious and depressed mood, delusions of damnation, possession and immortality, suicidal and self-mutilating behavior are included. The first description of the syndrome was made in 1880 by Cotard, who presented the case of a female patient in a lecture. He originally named it "hypochondriac delusion", and some years later "delusion of negations", while it was named "Cotard delusion" after his death...
October 2016: Psychiatrikē, Psychiatriki
https://www.readbyqxmd.com/read/28032161/psychological-and-psychiatric-traits-in-post-bariatric-patients-asking-for-body-contouring-surgery
#18
COMPARATIVE STUDY
Chiara Pavan, Massimo Marini, Eleonora De Antoni, Carlotta Scarpa, Tito Brambullo, Franco Bassetto, Annapina Mazzotta, Vincenzo Vindigni
BACKGROUNDS: Obese patients, mainly females, feel uncomfortable and unsatisfied with their physical appearance; they have a wrong perception of their image and consequently diminish their self-esteem, sometimes showing difficulties in functional areas such as work, relationship, social activity. Beside health concerns, improving their appearance and body image are often common motives for weight loss in obese individuals and after weight loss about 30% of bariatric surgery patients undergo plastic surgical correction of excessive skin...
February 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/27926449/the-role-of-dopamine-in-the-pathophysiology-and-treatment-of-apathy
#19
REVIEW
T T-J Chong, M Husain
Disorders of diminished motivation, such as apathy, are common and prevalent across a wide range of medical conditions, including Parkinson's disease, Alzheimer's dementia, stroke, depression, and schizophrenia. Such disorders have a significant impact on morbidity and quality of life, yet their management lacks consensus and remains unsatisfactory. Here, we review laboratory and clinical evidence for the use of dopaminergic therapies in the treatment of apathy. Dopamine is a key neurotransmitter that regulates motivated decision making in humans and other species...
2016: Progress in Brain Research
https://www.readbyqxmd.com/read/27869058/relationship-of-amotivation-to-neurocognition-self-efficacy-and-functioning-in-first-episode-psychosis-a-structural-equation-modeling-approach
#20
W C Chang, V W Y Kwong, C L M Hui, S K W Chan, E H M Lee, E Y H Chen
BACKGROUND: Better understanding of the complex interplay among key determinants of functional outcome is crucial to promoting recovery in psychotic disorders. However, this is understudied in the early course of illness. We aimed to examine the relationships among negative symptoms, neurocognition, general self-efficacy and global functioning in first-episode psychosis (FEP) patients using structural equation modeling (SEM). METHOD: Three hundred and twenty-one Chinese patients aged 26-55 years presenting with FEP to an early intervention program in Hong Kong were recruited...
March 2017: Psychological Medicine
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