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Executive functions

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https://www.readbyqxmd.com/read/28346865/repetitive-transcranial-magnetic-stimulation-for-the-treatment-of-executive-function-deficits-in-autism-spectrum-disorder-clinical-trial-approach
#1
Stephanie H Ameis, Zafiris J Daskalakis, Daniel M Blumberger, Pushpal Desarkar, Irene Drmic, Donald J Mabbott, Meng-Chuan Lai, Paul E Croarkin, Peter Szatmari
OBJECTIVE: Executive function (EF) deficits in patients with autism spectrum disorder (ASD) are ubiquitous and understudied. Further, there are no effective, neuroscience-based treatments to address this impairing feature of ASD. Repetitive transcranial magnetic stimulation (rTMS) has demonstrated promise in addressing EF deficits in adult neuropsychiatric disorders. This article will outline the design of a novel randomized-controlled trial of bilateral, 20 Hz, rTMS applied to the dorsolateral prefrontal cortex (DLPFC) for treatment of EF deficits in ASD that is currently ongoing...
March 27, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28346759/commentary-what-s-in-a-word-or-words-on-the-relations-among-self-regulation-self-control-executive-functioning-effortful-control-cognitive-control-impulsivity-risk-taking-and-inhibition-for-developmental-psychopathology-reflections-on-nigg-2017
#2
Nancy Eisenberg
In Nigg's excellent article, he deals with a variety of complex conceptual issues related to the constructs of self-regulation and executive functioning (EF). Overall, I agree that the terminology proposed by Nigg should be adopted; moreover, the conceptual distinctions he provides should help the field to move forward with regard to the understanding of varied constructs related to self-regulation. In the spirit of further clarification, I questioned Nigg's suggestions that (a) working memory should be considered as part of the construct of top-down regulation and (b) planning is a higher level component of EF but not part of effortful control...
April 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28346535/caudwell-xtreme-everest-a-prospective-study-of-the-effects-of-environmental-hypoxia-on-cognitive-functioning
#3
Konstadina Griva, Jan Stygall, Mark H Wilson, Daniel Martin, Denny Levett, Kay Mitchell, Monty Mythen, Hugh E Montgomery, Mike P Grocott, Golnar Aref-Adib, Mark Edsell, Tracie Plant, Chris Imray, Debbie Cooke, Jane Harrington, Maryam Khosravi, Stanton P Newman
BACKGROUND: The neuropsychological consequences of exposure to environmental hypobaric hypoxia (EHH) remain unclear. We thus investigated them in a large group of healthy volunteers who trekked to Mount Everest base camp (5,300 m). METHODS: A neuropsychological (NP) test battery assessing memory, language, attention, and executive function was administered to 198 participants (age 44.5±13.7 years; 60% male). These were studied at baseline (sea level), 3,500 m (Namche Bazaar), 5,300 m (Everest Base Camp) and on return to 1,300 m (Kathmandu) (attrition rate 23...
2017: PloS One
https://www.readbyqxmd.com/read/28346402/large-scale-design-of-robust-genetic-circuits-with-multiple-inputs-and-outputs-for-mammalian-cells
#4
Benjamin H Weinberg, N T Hang Pham, Leidy D Caraballo, Thomas Lozanoski, Adrien Engel, Swapnil Bhatia, Wilson W Wong
Engineered genetic circuits for mammalian cells often require extensive fine-tuning to perform as intended. We present a robust, general, scalable system, called 'Boolean logic and arithmetic through DNA excision' (BLADE), to engineer genetic circuits with multiple inputs and outputs in mammalian cells with minimal optimization. The reliability of BLADE arises from its reliance on recombinases under the control of a single promoter, which integrates circuit signals on a single transcriptional layer. We used BLADE to build 113 circuits in human embryonic kidney and Jurkat T cells and devised a quantitative, vector-proximity metric to evaluate their performance...
March 27, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28343334/design-and-test-of-a-microsoft-kinect-based-system-for-delivering-adaptive-visual-feedback-to-stroke-patients-during-training-of-upper-limb-movement
#5
Daniel Simonsen, Mirjana B Popovic, Erika G Spaich, Ole Kæseler Andersen
The present paper describes the design and test of a low-cost Microsoft Kinect-based system for delivering adaptive visual feedback to stroke patients during the execution of an upper limb exercise. Eleven sub-acute stroke patients with varying degrees of upper limb function were recruited. Each subject participated in a control session (repeated twice) and a feedback session (repeated twice). In each session, the subjects were presented with a rectangular pattern displayed on a vertical mounted monitor embedded in the table in front of the patient...
March 25, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28342751/reproducibility-of-four-frequently-used-local-heating-protocols-to-assess-cutaneous-microvascular-function
#6
Kirsty A Roberts, Thijs van Gent, Nicola D Hopkins, Helen Jones, Ellen A Dawson, Richard Draijer, Howard H Carter, Ceri L Atkinson, Daniel J Green, Dick H J Thijssen, David A Low
BACKGROUND: Skin microvascular responses to local heating are frequently used to assess microvascular function. Several local heating protocols have been developed, all varying slightly in execution. The aim of this study was to determine the inter-day reproducibility of the four most commonly used local heating protocols in healthy young subjects. METHODS: Fifteen, healthy males (28±5yrs, BMI 25±2kg/m(2)) attended two experimental trials 2-7days apart. During each trial, baseline and maximal thermally stimulated forearm skin responses were examined simultaneously at four sites on the dominant forearm using laser Doppler flowmetry (LDF)...
March 22, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28342697/recent-publications-from-the-alzheimer-s-disease-neuroimaging-initiative-reviewing-progress-toward-improved-ad-clinical-trials
#7
REVIEW
Michael W Weiner, Dallas P Veitch, Paul S Aisen, Laurel A Beckett, Nigel J Cairns, Robert C Green, Danielle Harvey, Clifford R Jack, William Jagust, John C Morris, Ronald C Petersen, Andrew J Saykin, Leslie M Shaw, Arthur W Toga, John Q Trojanowski
INTRODUCTION: The Alzheimer's Disease Neuroimaging Initiative (ADNI) has continued development and standardization of methodologies for biomarkers and has provided an increased depth and breadth of data available to qualified researchers. This review summarizes the 450+ publications using ADNI data during 2014 and 2015. METHODS: We used standard searches to find publications using ADNI data. RESULTS: (1) Structural and functional changes, including subtle changes to hippocampal shape and texture, atrophy in areas outside of hippocampus, and disruption to functional networks, are detectable in presymptomatic subjects before hippocampal atrophy; (2) In subjects with abnormal β-amyloid deposition (Aβ+), biomarkers become abnormal in the order predicted by the amyloid cascade hypothesis; (3) Cognitive decline is more closely linked to tau than Aβ deposition; (4) Cerebrovascular risk factors may interact with Aβ to increase white-matter (WM) abnormalities which may accelerate Alzheimer's disease (AD) progression in conjunction with tau abnormalities; (5) Different patterns of atrophy are associated with impairment of memory and executive function and may underlie psychiatric symptoms; (6) Structural, functional, and metabolic network connectivities are disrupted as AD progresses...
March 22, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28342644/steeper-slope-of-age-related-changes-in-white-matter-microstructure-and-processing-speed-in-bipolar-disorder
#8
Sheena I Dev, Tanya T Nguyen, Benjamin S McKenna, Ashley N Sutherland, Hauke Bartsch, Rebecca J Theilmann, Lisa T Eyler
OBJECTIVES: Bipolar disorder (BD) is associated with compromised white matter (WM) integrity and deficits in processing speed (PS). Few studies, however, have investigated age relationships with WM structure and cognition to understand possible changes in brain health over the lifespan. This investigation explored whether BD and healthy counterpart (HC) participants exhibited differential age-related associations with WM and cognition, which may be suggestive of accelerated brain and cognitive aging...
February 16, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28342166/second-language-exposure-functional-communication-and-executive-function-in-children-with-and-without-autism-spectrum-disorder-asd
#9
Grace Iarocci, Sarah M Hutchison, Gillian O'Toole
Parents and professionals are concerned that second language exposure may delay communication in children with ASD. In this study 174 youth (6-16 years) with and without ASD, exposed to a second language, were compared on executive function (EF) and functional communication (FC) with their peers without exposure. There were no significant differences between groups on age, IQ, and socioeconomic status. Parents reported on language exposure and rated EF and FC skills within everyday social contexts. The findings indicated that second language exposure in children with ASD is not associated with delay in cognitive and functional communication skills rather there was evidence of a reduced clinical impact as indexed by a lower percentage of children whose FC and EF ratings fell within the clinical range...
March 24, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28342165/formal-thought-disorder-and-executive-functioning-in-children-and-adolescents-with-autism-spectrum-disorder-old-leads-and-new-avenues
#10
Tim Ziermans, Hanna Swaab, Alexander Stockmann, Esther de Bruin, Sophie van Rijn
Formal thought disorder (FTD) is a disruption in the flow of thought and a common feature in psychotic disorders and autism spectrum disorder (ASD). Executive dysfunction has often been associated with FTD, yet for ASD convincing evidence is lacking. This study investigated FTD and three core executive functions in 50 young children and adolescents with high-functioning ASD and 56 matched controls. Higher overall levels of FTD marked ASD compared to controls. Furthermore, in ASD decreased performance on verbal working memory was correlated with increased FTD ratings and explained a significant amount of variance of objective and subjective FTD...
March 24, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28341210/chronic-kidney-disease-and-subclinical-brain-infarction-increase-the-risk-of-vascular-cognitive-impairment-the-sefuri-study
#11
Hiroshi Yao, Yuko Araki, Yuki Takashima, Akira Uchino, Takefumi Yuzuriha, Manabu Hashimoto
BACKGROUND AND PURPOSE: The purpose of this study was to determine the complex associations among chronic kidney disease (CKD), subclinical brain infarction (SBI), and cognitive impairment. METHODS: We used structural equation modeling (SEM) to examine the complex relationships among CKD, SBI, and cognitive function with Mini-Mental State Examination (MMSE; global function) and modified Stroop test (executive function) in a population-based cohort of 560 non-demented elderly subjects...
February 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28341151/mice-heterozygous-for-an-inactivated-allele-of-the-schizophrenia-associated-brd1-gene-display-selective-cognitive-deficits-with-translational-relevance-to-schizophrenia
#12
Per Qvist, Anto P Rajkumar, John P Redrobe, Mette Nyegaard, Jane H Christensen, Ole Mors, Gregers Wegener, Michael Didriksen, Anders D Børglum
Schizophrenia is a debilitating brain disorder characterized by disturbances of emotion, perception and cognition. Cognitive impairments predict functional outcome in schizophrenia and are detectable even in the prodromal stage of the disorder. However, our understanding of the underlying neurobiology is limited and procognitive treatments remain elusive. We recently demonstrated that mice heterozygous for an inactivated allele of the schizophrenia-associated Brd1 gene (Brd1(+/-) mice) display behaviors reminiscent of schizophrenia, including impaired social cognition and long-term memory...
March 21, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28340673/the-advent-of-vascularized-composite-allotransplantation
#13
REVIEW
Curtis L Cetrulo, Zhi Yang Ng, Jonathan M Winograd, Kyle R Eberlin
Modern microsurgical techniques have made possible a broad spectrum of novel means for the reconstruction of complex bone and soft tissue defects. These techniques, in combination with developments in transplant immunology, have led to successful hand and facial allotransplantation and achievement of the highest rung in the reconstructive ladder - truly replacing like with like. The utilization of contemporary microsurgical technique in the context of vascularized composite allotransplantation (VCA) (1) permits successful technical execution and feasibility of VCA, (2) facilitates the study of immunologic tolerance in VCA preclinical models, and (3) optimizes functional VCA outcomes...
April 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28340582/optimisation-of-an-exemplar-oculomotor-model-using-multi-objective-genetic-algorithms-executed-on-a-gpu-cpu-combination
#14
Eleftherios Avramidis, Ozgur E Akman
BACKGROUND: Parameter optimisation is a critical step in the construction of computational biology models. In eye movement research, computational models are increasingly important to understanding the mechanistic basis of normal and abnormal behaviour. In this study, we considered an existing neurobiological model of fast eye movements (saccades), capable of generating realistic simulations of: (i) normal horizontal saccades; and (ii) infantile nystagmus - pathological ocular oscillations that can be subdivided into different waveform classes...
March 24, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28340321/exploring-the-relationship-between-cognition-and-functional-verbal-reasoning-in-adults-with-severe-traumatic-brain-injury-at-six-months-post-injury
#15
Petra Avramović, Belinda Kenny, Emma Power, Skye McDonald, Robyn Tate, Louise Hunt, Sheila MacDonald, Rob Heard, Leanne Togher
OBJECTIVE(S): This study aims to determine the association between cognitive impairment and functional verbal reasoning in adults with severe traumatic brain injury (TBI), at six months post-injury. METHOD(S): 38 participants with severe TBI were assessed using the four tasks on the Functional Assessment of Verbal Reasoning and Executive Strategies (FAVRES) [1] and a battery of neuropsychological tests at 6 months post injury in a cross-sectional observational study...
March 24, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28340315/systematic-behavioural-observation-of-executive-performance-after-brain-injury
#16
Mark W Lewis, Duncan R Babbage, Janet M Leathem
OBJECTIVE: To develop an ecologically valid measure of executive functioning (i.e. Planning and Organization, Executive Memory, Initiation, Cognitive Shifting, Impulsivity, Sustained and Directed Attention, Error Detection, Error Correction and Time Management) during a functional chocolate brownie cooking task. METHODS: In Study 1, the inter-rater reliability of a novel behavioural observation assessment method was assessed with 10 people with traumatic brain injury (TBI)...
March 24, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28340244/bupropion-administration-increases-resting-state-functional-connectivity-in-dorso-medial-prefrontal-cortex
#17
Ewelina Rzepa, Zola Dean, Ciara McCabe
Background: Patients on the selective serotonergic re-uptake inhibitors (SSRI) like citalopram report emotional blunting. We have shown previously that citalopram reduces resting-state functional connectivity (RSFC) in healthy volunteers in a number of brain regions including the dorso-medial prefrontal cortex, which may be related to its clinical effects. Bupropion is a dopaminergic and noradrenergic re-uptake inhibitor (DNRI) and is not reported to cause emotional blunting. However how bupropion affects RSFC in healthy controls remains unknown...
March 11, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28340237/pain-and-cognition-in-multiple-sclerosis
#18
R Scherder, N Kant, E Wolf, A C M Pijnenburg, E Scherder
Objective. : The goal of the present study was to examine the relationship between pain and cognition in patients with multiple sclerosis. Design. : Cross-sectional. Setting. : Nursing home and personal environment of the investigators. Subjects. : Two groups of participants were included: 91 patients with multiple sclerosis and 80 matched control participants. Methods. : The level of pain was measured by the following pain scales: Number of Words Chosen-Affective, Colored Analogue Scale for pain intensity and suffering from pain, and the Faces Pain Scale...
March 15, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28340050/naps-enhance-executive-attention-in-preschool-aged-children
#19
Amanda Cremone, Jennifer M McDermott, Rebecca M C Spencer
Executive attention is impaired following sleep loss in school-aged children, adolescents, and adults. Whether naps improve attention relative to nap deprivation in preschool-aged children is unknown. The aim of this study was to compare executive attention in preschool children following a nap and an interval of wake.  Sixty-nine children, 35-70 months of age, completed a Flanker task to assess executive attention following a nap and an equivalent interval of wake.  Overall, accuracy was greater after the nap compared with the wake interval...
March 13, 2017: Journal of Pediatric Psychology
https://www.readbyqxmd.com/read/28339998/executive-functioning-in-pediatric-chronic-pain-do-deficits-exist
#20
Karen E Weiss, Cynthia Harbeck-Weber, Michael J Zaccariello, Jacqueline N Kimondo, Tracy E Harrison, Barbara K Bruce
Objective. : Despite ample research documenting deficits in executive functioning for adults with chronic pain, the literature on pediatric patients with chronic pain is limited and provides mixed results. The current study sought to further investigate the nature of executive dysfunction in this population and also examine the relationships between pain intensity, duration, and catastrophizing with sustained attention, working memory, and self- and parent-report of executive functioning...
March 6, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
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