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Neurocognitive and learning

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https://www.readbyqxmd.com/read/28818658/cue-dependent-inhibition-in-posttraumatic-stress-disorder-and-attention-deficit-hyperactivity-disorder
#1
Zachary W Adams, Michael Meinzer, Howard Mandel, Joshua Voltin, Blaine Caughron, Floyd R Sallee, Mark Hamner, Zhewu Wang
OBJECTIVE: Attention-deficit/hyperactivity disorder (ADHD) and posttraumatic stress disorder (PTSD) are common among military veterans, but the comorbidity of these two psychiatric disorders remains largely unstudied. Evaluating response inhibition and cue-dependent learning as behavioral and neurocognitive mechanisms underlying ADHD/PTSD can inform etiological models and development of tailored interventions. METHOD: A cued go/no-go task evaluated response inhibition in 160 adult males...
August 9, 2017: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/28809651/effectiveness-of-occupational-therapy-interventions-to-enhance-occupational-performance-for-adults-with-alzheimer-s-disease-and-related-major-neurocognitive-disorders-a-systematic-review
#2
Stacy Smallfield, Cindy Heckenlaible
OBJECTIVE: The purpose of this systematic review was to describe the evidence for the effectiveness of interventions designed to establish, modify, and maintain occupations for adults with Alzheimer's disease (AD) and related neurocognitive disorders. METHOD: Titles and abstracts of 2,597 articles were reviewed, of which 256 were retrieved for full review and 52 met inclusion criteria. U.S. Preventive Services Task Force levels of certainty and grade definitions were used to describe the strength of evidence...
September 2017: American Journal of Occupational Therapy: Official Publication of the American Occupational Therapy Association
https://www.readbyqxmd.com/read/28807191/cognitive-and-motor-performance-in-congolese-children-with-konzo-during-4-years-of-follow-up-a-longitudinal-analysis
#3
Michael J Boivin, Daniel Okitundu, Bumoko Makila-Mabe, Marie-Therese Sombo, Dieudonne Mumba, Alla Sikorskii, Banea Mayambu, Desire Tshala-Katumbay
BACKGROUND: Konzo is an irreversible upper-motor neuron disorder affecting children dependent on bitter cassava for food. The neurocognitive ability of children with konzo over time has yet to be fully documented. METHODS: We did a longitudinal study in a konzo outbreak zone continuously affected by konzo since 1990, in the district of Kahemba, southern Bandundu Province, Congo. We enrolled children with a record of neurological diagnosis of konzo in Kahemba town...
September 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28803867/dynamics-of-eeg-functional-connectivity-during-statistical-learning
#4
Brigitta Tóth, Karolina Janacsek, Ádám Takács, Andrea Kóbor, Zsófia Zavecz, Dezso Nemeth
Statistical learning is a fundamental mechanism of the brain, which extracts and represents regularities of our environment. Statistical learning is crucial in predictive processing, and in the acquisition of perceptual, motor, cognitive, and social skills. Although previous studies have revealed competitive neurocognitive processes underlying statistical learning, the neural communication of the related brain regions (functional connectivity, FC) has not yet been investigated. The present study aimed to fill this gap by investigating FC networks that promote statistical learning in humans...
August 10, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28800740/neurocognitive-sparing-of-desktop-microbeam-irradiation
#5
Soha Bazyar, Christina R Inscoe, Thad Benefield, Lei Zhang, Jianping Lu, Otto Zhou, Yueh Z Lee
BACKGROUND: Normal tissue toxicity is the dose-limiting side effect of radiotherapy. Spatial fractionation irradiation techniques, like microbeam radiotherapy (MRT), have shown promising results in sparing the normal brain tissue. Most MRT studies have been conducted at synchrotron facilities. With the aim to make this promising treatment more available, we have built the first desktop image-guided MRT device based on carbon nanotube x-ray technology. In the current study, our purpose was to evaluate the effects of MRT on the rodent normal brain tissue using our device and compare it with the effect of the integrated equivalent homogenous dose...
August 11, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28782983/neurocognitive-dysfunction-in-addiction-testing-hypotheses-of-diffuse-versus-selective-phenotypic-dysfunction-with-a-classification-based-approach
#6
Warren K Bickel, Lara N Moody, Celia R Eddy, Christopher T Franck
Neurocognitive dysfunctions are frequently identified in the addictions. These dysfunctions may indicate either diffuse dysfunction or may represent separate facets that have differential importance to the addiction phenotype. In a sample (n = 260) of alcohol and/or stimulant users and controls we measured responses across 7 diverse neurocognitive measures. These measures were Continuous Performance, Delay Discounting, Iowa Gambling, Stroop, Tower, Wisconsin Card Sorting, and Letter Number Sequencing. Comparisons were then made between the drug-dependent groups and controls using analysis of variance and also using a machine learning approach to classify participants based on task performance as substance-dependent or controls in 1 tree and as alcohol and/or stimulant users or controls in a second tree...
August 2017: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28758167/joint-data-harmonization-and-group-cardinality-constrained-classification
#7
Yong Zhang, Sang Hyun Park, Kilian M Pohl
To boost the power of classifiers, studies often increase the size of existing samples through the addition of independently collected data sets. Doing so requires harmonizing the data for demographic and acquisition differences based on a control cohort before performing disease specific classification. The initial harmonization often mitigates group differences negatively impacting classification accuracy. To preserve cohort separation, we propose the first model unifying linear regression for data harmonization with a logistic regression for disease classification...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28756110/a-comparative-meta-analysis-of-neurocognition-in-first-degree-relatives-of-patients-with-schizophrenia-and-bipolar-disorder
#8
E Bora
OBJECTIVE: Cognitive impairment is a familial and heritable aspect of major psychoses and might be a shared vulnerability marker for schizophrenia and BP. However, it is not clear whether some aspects of cognitive deficits are uniquely associated with risk for specific diagnoses. METHODS: A novel meta-analysis of cognitive functions in first-degree relatives of probands with bipolar disorder (BP-Rel) and schizophrenia (Sch-Rel) was conducted. Current meta-analysis included 20 studies and compared cognitive functions of 1341 Sch-Rel, 939 BP-Rel and 1427 healthy controls...
July 5, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28743240/whole-brain-radiotherapy-versus-stereotactic-radiosurgery-for-4-10-brain-metastases-a-phase-iii-randomised-multicentre-trial
#9
Jaap D Zindler, Anna M E Bruynzeel, Daniëlle B P Eekers, Coen W Hurkmans, Ans Swinnen, Philippe Lambin
BACKGROUND: Maintenance of quality of life is the primary goal during treatment of brain metastases (BM). This is a protocol of an ongoing phase III randomised multicentre study. This study aims to determine the exact additional palliative value of stereotactic radiosurgery (SRS) over whole brain radiotherapy (WBRT) in patients with 4-10 BM. METHODS: The study will include patients with 4-10 BM from solid primary tumours diagnosed on a high-resolution contrast-enhanced MRI scan with a maximum lesional diameter of 2...
July 25, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28735593/virtual-reality-in-the-assessment-and-treatment-of-psychosis-a-systematic-review-of-its-utility-acceptability-and-effectiveness
#10
M Rus-Calafell, P Garety, E Sason, T J K Craig, L R Valmaggia
Over the last two decades, there has been a rapid increase of studies testing the efficacy and acceptability of virtual reality in the assessment and treatment of mental health problems. This systematic review was carried out to investigate the use of virtual reality in the assessment and the treatment of psychosis. Web of Science, PsychInfo, EMBASE, Scopus, ProQuest and PubMed databases were searched, resulting in the identification of 638 articles potentially eligible for inclusion; of these, 50 studies were included in the review...
July 24, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28734837/neural-reuse-of-action-perception-circuits-for-language-concepts-and-communication
#11
REVIEW
Friedemann Pulvermüller
Neurocognitive and neurolinguistics theories make explicit statements relating specialized cognitive and linguistic processes to specific brain loci. These linking hypotheses are in need of neurobiological explanation. Recent mathematical models of human language mechanisms constrained by fundamental neuroscience principles and established knowledge about comparative neuroanatomy offer explanations for where, when and how language is processed in the human brain. In these models, network structure and connectivity along with action- and perception-induced correlation of neuronal activity co-determine neurocognitive mechanisms...
July 19, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28720484/long-term-enzyme-replacement-therapy-improves-neurocognitive-functioning-and-hippocampal-synaptic-plasticity-in-immune-tolerant-alpha-mannosidosis-mice
#12
Stijn Stroobants, Markus Damme, Ann Van der Jeugd, Ben Vermaercke, Claes Andersson, Jens Fogh, Paul Saftig, Judith Blanz, Rudi D'Hooge
Alpha-mannosidosis is a glycoproteinosis caused by deficiency of lysosomal acid alpha-mannosidase (LAMAN), which markedly affects neurons of the central nervous system (CNS), and causes pathognomonic intellectual dysfunction in the clinical condition. Cognitive improvement consequently remains a major therapeutic objective in research on this devastating genetic error. Immune-tolerant LAMAN knockout mice were developed to evaluate the effects of enzyme replacement therapy (ERT) by prolonged administration of recombinant human enzyme...
July 15, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28716964/a-glun2b-selective-nmdar-antagonist-reverses-synapse-loss-and-cognitive-impairment-produced-by-the-hiv-1-protein-tat
#13
Jonathan D Raybuck, Nicholas J Hargus, Stanley A Thayer
HIV-associated neurocognitive disorder (HAND) affects approximately half of HIV-infected patients. Loss of synaptic connections is a hallmark of many neurocognitive disorders, including HAND. The HIV-1 protein transactivator of transcription (Tat) disrupts synaptic connections both in vitro and in vivo and has been linked to impaired neurocognitive function in humans. In vitro studies have shown that ifenprodil, an antagonist selective for GluN2B-containing NMDARs, reverses synapse loss when applied after Tat...
July 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28707570/using-event-related-potentials-to-inform-the-neurocognitive-processes-underlying-knowledge-extension-through-memory-integration
#14
Nicole L Varga, Patricia J Bauer
To build a general knowledge base, it is imperative that individuals acquire, integrate, and further extend knowledge across experiences. For instance, in one episode an individual may learn that George Washington was the first president. In a separate episode he or she may then learn that Washington was the commander of the Continental Army. Integration of the information in memory may then support self-derivation of the new knowledge that the leader of the Continental Army was also the first president. Despite a considerable amount of fMRI research aimed at further elucidating the neuroanatomical regions supporting this ability, a consensus has yet to be reached with regards to the precise neurocognitive processes involved...
July 14, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28705227/sensorimotor-learning-neurocognitive-mechanisms-and-individual-differences
#15
REVIEW
R D Seidler, R G Carson
Here we provide an overview of findings and viewpoints on the mechanisms of sensorimotor learning presented at the 2016 Biomechanics and Neural Control of Movement (BANCOM) conference in Deer Creek, OH. This field has shown substantial growth in the past couple of decades. For example it is now well accepted that neural systems outside of primary motor pathways play a role in learning. Frontoparietal and anterior cingulate networks contribute to sensorimotor adaptation, reflecting strategic aspects of exploration and learning...
July 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28695791/lutein-and-zeaxanthin-influence-brain-function-in-older-adults-a-randomized-controlled-trial
#16
Cutter A Lindbergh, Lisa M Renzi-Hammond, Billy R Hammond, Douglas P Terry, Catherine M Mewborn, Antonio N Puente, L Stephen Miller
OBJECTIVES: The present study constitutes the first randomized controlled trial to investigate the relation of lutein (L) and zeaxanthin (Z) to brain function using functional magnetic resonance imaging (fMRI). It was hypothesized that L and Z supplementation in older adults would enhance neural efficiency (i.e., reduce activation) and cognitive performance on a verbal learning task relative to placebo. METHODS: A total of 44 community-dwelling older adults (mean age=72 years) were randomly assigned to receive either placebo or L+Z supplementation (12 mg/daily) for 1 year...
July 11, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28695777/the-limited-impact-that-cocaine-use-patterns-have-on-neurocognitive-functioning-in-individuals-with-cocaine-use-disorder
#17
James J Mahoney, Ari D Kalechstein, Thomas F Newton, Richard De La Garza
It is well-documented in the literature that cocaine use is associated with neurocognitive impairment. The manner in which patterns of cocaine use, such as years of use, recent use over the past month, and daily amount of cocaine use, moderate neurocognition has been studied in a relatively piecemeal manner. Hence, the purpose of the study was to evaluate whether cocaine use patterns modulate neurocognition in individuals with cocaine use disorder. Cocaine users who were cocaine-negative ( n=125) were divided into tertiles based on cocaine use patterns and the performances of the highest and lowest groups were compared on the following cognitive measures: Continuous Performance Task-II, n-back, and Hopkins Verbal Learning Task-Revised...
July 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28691604/parent-psychopathology-and-neurocognitive-functioning-in-children-with-adhd
#18
Sharifah Shameem Agha, Stanley Zammit, Anita Thapar, Kate Langley
OBJECTIVE: The objective of this study was to examine the association between parent mental health (ADHD and depression) and offspring performance on neurocognitive tasks in children with ADHD. METHOD: The clinical sample consisted of 570 children (85% males, mean age: 10.77 years) with ADHD who completed neurocognitive tasks measuring working memory, attention set-shifting, and motivational deficits. Questionnaire measures were used to assess ADHD and depression symptom presence in parents...
July 1, 2017: Journal of Attention Disorders
https://www.readbyqxmd.com/read/28689758/white-matter-microstructure-predicts-cognitive-training-induced-improvements-in-attention-and-executive-functioning-in-schizophrenia
#19
Karuna Subramaniam, Jeevit Gill, Melissa Fisher, Pratik Mukherjee, Srikantan Nagarajan, Sophia Vinogradov
We examined the relationship between white matter microstructure in schizophrenia using diffusion tensor imaging (DTI) and cognitive improvements induced by 70h (~16weeks) of cognitive training. We measured anatomical connectivity in 48 patients with schizophrenia (SZ) and 28 healthy control participants (HC) at baseline, and then examined the relationship between anatomical connectivity at baseline and training-induced cognitive gains in 30 SZ who performed diffusion imaging after completing 70h of training...
July 6, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28689673/the-anatomy-of-apathy-a-neurocognitive-framework-for-amotivated-behaviour
#20
C Le Heron, M A J Apps, M Husain
Apathy is a debilitating syndrome associated with many neurological disorders, including several common neurodegenerative diseases such as Parkinson's disease and Alzheimer's disease, and focal lesion syndromes such as stroke. Here, we review neuroimaging studies to identify anatomical correlates of apathy, across brain disorders. Our analysis reveals that apathy is strongly associated with disruption particularly of dorsal anterior cingulate cortex (dACC), ventral striatum (VS) and connected brain regions...
July 8, 2017: Neuropsychologia
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