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Cognitive Error

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https://www.readbyqxmd.com/read/28641496/guanfacine-attenuates-adverse-effects-of-dronabinol-thc-on-working-memory-in-adolescent-onset-heavy-cannabis-users-a-pilot-study
#1
David S Mathai, Manuela Holst, Christopher Rodgman, Colin N Haile, Jake Keller, Mariyah Z Hussain, Thomas R Kosten, Thomas F Newton, Christopher D Verrico
The cannabinoid-1 receptor (CB1R) agonist Δ9-tetrahydrocannabinol (THC), the main psychoactive constituent of cannabis, adversely effects working memory performance in humans. The α2A-adrenoceptor (AR) agonist guanfacine improves working memory performance in humans. The authors aimed to determine the effects of short-term (6 days) treatment with guanfacine on adverse cognitive effects produced by THC. Employing a double-blind, placebo-controlled crossover design, the cognitive, subjective, and cardiovascular effects produced by oral THC (20 mg) administration were determined twice in the same cannabis users: once after treatment with placebo and once after treatment with guanfacine (3 mg/day)...
June 23, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28638334/frontal-theta-dynamics-during-response-conflict-in-long-term-mindfulness-meditators
#2
Han-Gue Jo, Peter Malinowski, Stefan Schmidt
Mindfulness meditators often show greater efficiency in resolving response conflicts than non-meditators. However, the neural mechanisms underlying the improved behavioral efficiency are unclear. Here, we investigated frontal theta dynamics-a neural mechanism involved in cognitive control processes-in long-term mindfulness meditators. The dynamics of EEG theta oscillations (4-8 Hz) recorded over the medial frontal cortex (MFC) were examined in terms of their power (MFC theta power) and their functional connectivity with other brain areas (the MFC-centered theta network)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28637152/how-physical-therapists-instruct-patients-with-stroke-an-observational-study-on-attentional-focus-during-gait-rehabilitation-after-stroke
#3
Elmar Kal, Henrieke van den Brink, Han Houdijk, John van der Kamp, Paulien Helena Goossens, Coen van Bennekom, Erik Scherder
PURPOSE: People without neurological impairments show superior motor learning when they focus on movement effects (external focus) rather than on movement execution itself (internal focus). Despite its potential for neurorehabilitation, it remains unclear to what extent external focus strategies are currently incorporated in rehabilitation post-stroke. Therefore, we observed how physical therapists use attentional focus when treating gait of rehabilitating patients with stroke. METHODS: Twenty physical therapist-patient couples from six rehabilitation centers participated...
February 24, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28634459/cognitive-correlates-of-different-mentalizing-abilities-in-individuals-with-high-and-low-trait-schizotypy-findings-from-an-extreme-group-design
#4
Krisztina Kocsis-Bogár, Simone Kotulla, Susanne Maier, Martin Voracek, Kristina Hennig-Fast
Mentalizing or Theory of Mind (ToM) deficits in schizophrenia have been studied to great extent, but studies involving samples of trait schizotypy yield ambiguous results. Executive functions like cognitive inhibition, cognitive flexibility, and agency are all prerequisites of mentalizing, and it is assumed that the impairment of these functions contributes to ToM deficits in schizophrenia. Whether these impairments influence the ToM performance of people with high trait schizotypy remains unclear. Although impaired self-agency has repeatedly been identified in people with schizotypy, its role in mentalizing is yet to be investigated...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28634438/computational-models-of-anterior-cingulate-cortex-at-the-crossroads-between-prediction-and-effort
#5
Eliana Vassena, Clay B Holroyd, William H Alexander
In the last two decades the anterior cingulate cortex (ACC) has become one of the most investigated areas of the brain. Extensive neuroimaging evidence suggests countless functions for this region, ranging from conflict and error coding, to social cognition, pain and effortful control. In response to this burgeoning amount of data, a proliferation of computational models has tried to characterize the neurocognitive architecture of ACC. Early seminal models provided a computational explanation for a relatively circumscribed set of empirical findings, mainly accounting for EEG and fMRI evidence...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28633628/olfactory-testing-in-consecutive-patients-referred-with-suspected-dementia
#6
Ib Thrane Christensen, Elna-Marie Larsson, Ida E Holm, Ole B F Nielsen, Stig Andersen
BACKGROUND: Alzheimer's disease (AD) is the most common cause of dementia and early and accurate diagnosis is important. Olfactory dysfunction is an early sign of AD. The contribution by test of olfactory function has been surveyed in AD vs a line of conditions but remains to be settled in the workup of unselected patients referred with suspected dementia. METHODS: We performed a two-step investigation: first, a comparative study of healthy controls and probable AD patients to test the applicability of the chosen scents (cuisine study); second, a study of consecutive patients referred to our geriatric outpatient clinic for suspected dementia with the investigating personnel blinded to the results of the Olfactory Test (blinded study)...
June 20, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28631987/development-of-a-scale-of-executive-functioning-for-the-rbans
#7
Robert J Spencer, Katherine A Kitchen Andren, Kathryn A Tolle
The Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) is a cognitive battery that contains scales of several cognitive abilities, but no scale in the instrument is exclusively dedicated to executive functioning. Although the subtests allow for observation of executive-type errors, each error is of fairly low base rate, and healthy and clinical normative data are lacking on the frequency of these types of errors, making their significance difficult to interpret in isolation. The aim of this project was to create an RBANS executive errors scale (RBANS EE) with items comprised of qualitatively dysexecutive errors committed throughout the test...
February 22, 2017: Applied Neuropsychology. Adult
https://www.readbyqxmd.com/read/28631965/short-term-test-retest-reliability-of-the-impact-in-healthy-young-athletes
#8
Amanda M O'Brien, Joseph E Casey, Rachel M Salmon
The present study examined the short-term test-retest reliability of the Immediate Post-concussion Assessment and Cognitive Testing (ImPACT) variables with healthy 11- to 14-year-old athletes. 53 young athletes (Mage = 12.4 years, 9 female) were administered the ImPACT on two separate occasions two weeks apart. Participants were instructed to complete the Post-Concussion Symptom Scale (PCSS) and the baseline computerized neurocognitive test during both the baseline and retest phases. Intraclass correlation (ICC), standard error of measurement (SEM), and reliable change index (RCI) were used as reliability metrics...
February 22, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28630456/rare-disruptive-variants-in-the-disc1-interactome-and-regulome-association-with-cognitive-ability-and-schizophrenia
#9
S Teng, P A Thomson, S McCarthy, M Kramer, S Muller, J Lihm, S Morris, D C Soares, W Hennah, S Harris, L M Camargo, V Malkov, A M McIntosh, J K Millar, D H Blackwood, K L Evans, I J Deary, D J Porteous, W R McCombie
Schizophrenia (SCZ), bipolar disorder (BD) and recurrent major depressive disorder (rMDD) are common psychiatric illnesses. All have been associated with lower cognitive ability, and show evidence of genetic overlap and substantial evidence of pleiotropy with cognitive function and neuroticism. Disrupted in schizophrenia 1 (DISC1) protein directly interacts with a large set of proteins (DISC1 Interactome) that are involved in brain development and signaling. Modulation of DISC1 expression alters the expression of a circumscribed set of genes (DISC1 Regulome) that are also implicated in brain biology and disorder...
June 20, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28630450/concurrent-talking-in-immersive-virtual-reality-on-the-dominance-of-visual-speech-cues
#10
Mar Gonzalez-Franco, Antonella Maselli, Dinei Florencio, Nikolai Smolyanskiy, Zhengyou Zhang
Humans are good at selectively listening to specific target conversations, even in the presence of multiple concurrent speakers. In our research, we study how auditory-visual cues modulate this selective listening. We do so by using immersive Virtual Reality technologies with spatialized audio. Exposing 32 participants to an Information Masking Task with concurrent speakers, we find significantly more errors in the decision-making processes triggered by asynchronous audiovisual speech cues. More precisely, the results show that lips on the Target speaker matched to a secondary (Mask) speaker's audio severely increase the participants' comprehension error rates...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28629417/use-of-mobile-and-cordless-phones-and-change-in-cognitive-function-a-prospective-cohort-analysis-of-australian-primary-school-children
#11
Chhavi Raj Bhatt, Geza Benke, Catherine L Smith, Mary Redmayne, Christina Dimitriadis, Anna Dalecki, Skye Macleod, Malcolm R Sim, Rodney J Croft, Rory Wolfe, Jordy Kaufman, Michael J Abramson
BACKGROUND: Some previous studies have suggested an association between children's use of mobile phones (MPs)/cordless phones (CPs) and development of cognitive function. We evaluated possible longitudinal associations between the use of MPs and CPs in a cohort of primary school children and effects on their cognitive function. METHODS: Data on children's socio-demographics, use of MPs and CPs, and cognitive function were collected at baseline (2010-2012) and follow-up (2012-2013)...
June 19, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28629404/white-matter-lesions-characterise-brain-involvement-in-moderate-to-severe-chronic-obstructive-pulmonary-disease-but-cerebral-atrophy-does-not
#12
Catherine A Spilling, Paul W Jones, James W Dodd, Thomas R Barrick
BACKGROUND: Brain pathology is relatively unexplored in chronic obstructive pulmonary disease (COPD). This study is a comprehensive investigation of grey matter (GM) and white matter (WM) changes and how these relate to disease severity and cognitive function. METHODS: T1-weighted and fluid-attenuated inversion recovery images were acquired for 31 stable COPD patients (FEV1 52.1% pred., PaO2 10.1 kPa) and 24 age, gender-matched controls. T1-weighted images were segmented into GM, WM and cerebrospinal fluid (CSF) tissue classes using a semi-automated procedure optimised for use with this cohort...
June 19, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28627905/mind-wandering-in-healthy-aging-and-early-stage-alzheimer-s-disease
#13
Mate Gyurkovics, David A Balota, Jonathan D Jackson
OBJECTIVE: The frequency of mind-wandering (MW) decreases as a function of age in healthy individuals. One possible explanation is that MW is a resource-dependent process, and cognitive resources decline with age. The present study provides the first investigation of MW in the earliest stages of Alzheimer's disease (AD) to further examine the resource model and discontinuities between healthy aging and AD. METHOD: Three large cohorts completed the Sustained Attention to Response Task (SART): a healthy middle-aged group (mean age = 61...
June 19, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28626050/admission-brain-cortical-volume-an-independent-determinant-of-poststroke-cognitive-vulnerability
#14
Sharmila Sagnier, Gwenaëlle Catheline, Bixente Dilharreguy, Fanny Munsch, Antoine Bigourdan, Mathilde Poli, Sabrina Debruxelles, Stéphane Olindo, Pauline Renou, François Rouanet, Vincent Dousset, Thomas Tourdias, Igor Sibon
BACKGROUND AND PURPOSE: Several markers of poststroke cognitive impairment have been reported. The role of brain cortical volume remains uncertain. The aim of this study was to evaluate the influence of brain cortical volume on cognitive outcomes using a voxel-based morphometry approach in subjects without prestroke dementia. METHODS: Ischemic stroke patients were prospectively recruited 24 to 72 hours post-stroke (M0). Cognition was evaluated at M0, 3 months, and 1 year (M12) using the Montreal Cognitive Assessment, the Isaacs set test, and the Zazzo's cancellation task...
June 16, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28625936/do-medical-french-students-know-how-to-properly-score-a-mini-mental-state-examination
#15
Intza Hernandorena, Sophie Chauvelier, Jean-Sébastien Vidal, Matthieu Piccoli, Joséphine Coulon, Laurence Hugonot-Diener, Anne-Sophie Rigaud, Olivier Hanon, Emmanuelle Duron
The mini mental state examination (MMSE) is a validated tool to assess global cognitive function. Training is required before scoring. Inaccurate scoring can lead to inappropriate medical decisions. In France, MMSE is usually scored by medical students. To assess if medical French students know how to properly score a mini mental state examination. Two « physician-patient » role playings performed by 2 specialized physicians, were performed in front of University Paris V medical students. Role playing A: Scoring of a MMSE according to a script containing five tricks; Role playing B: Find the 5 errors committed in a pre-filled MMSE form, according to the second script...
June 1, 2017: Gériatrie et Psychologie Neuropsychiatrie du Vieillissement
https://www.readbyqxmd.com/read/28625494/acute-stress-shifts-the-balance-between-controlled-and-automatic-processes-in-prospective-memory
#16
Marcus Möschl, Moritz Walser, Franziska Plessow, Thomas Goschke, Rico Fischer
In everyday life we frequently rely on our abilities to postpone intentions until later occasions (prospective memory; PM) and to deactivate completed intentions even in stressful situations. Yet, little is known about the effects of acute stress on these abilities. In the present work we investigated the impact of acute stress on PM functioning under high task demands. 1) Different from previous studies, in which intention deactivation required mostly low processing demands, we used salient focal PM cues to induce high processing demands during intention-deactivation phases...
June 15, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28623869/changing-predictions-stable-recognition-children-s-representations-of-downward-incline-motion
#17
Michael Hast, Christine Howe
Various studies to-date have demonstrated children hold ill-conceived expressed beliefs about the physical world such as that one ball will fall faster than another because it is heavier. At the same time, they also demonstrate accurate recognition of dynamic events. How these representations relate is still unresolved. This study examined 5- to 11-year-olds' (N = 130) predictions and recognition of motion down inclines. Predictions were typically in error, matching previous work, but children largely recognized correct events as correct and rejected incorrect ones...
June 17, 2017: British Journal of Developmental Psychology
https://www.readbyqxmd.com/read/28623779/the-honest-truth-about-deception-demographic-cognitive-and-neural-correlates-of-child-repeated-deceptive-behavior
#18
Sandra Thijssen, Andrea Wildeboer, Marinus H van IJzendoorn, Ryan L Muetzel, Sandra J E Langeslag, Vincent W V Jaddoe, Frank C Verhulst, Henning Tiemeier, Marian J Bakermans-Kranenburg, Tonya White
This study examined situational, psychological, and neurobiological factors associated with deceptive behavior in 8-year-old children. By assessing deception in low- and high-risk conditions, we differentiated between children displaying some dishonesty and children who deceived repeatedly, and we assessed the correlates of deception in 163 children. A large majority of the children were deceptive in the low-risk condition (n=121, 74.2%), but most children refrained from deception when at risk for getting caught (69 of 121)...
June 14, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28622557/the-executive-profile-of-children-with-benign-epilepsy-of-childhood-with-centrotemporal-spikes-and-temporal-lobe-epilepsy
#19
Ellen M Lima, Patricia Rzezak, Catarina A Guimarães, Maria A Montenegro, Marilisa M Guerreiro, Kette D Valente
RATIONALE: Benign Epilepsy of Childhood with Centrotemporal Spikes (BECTS) and temporal lobe epilepsy (TLE) represent two distinct models of focal epilepsy of childhood. In both, there is evidence of executive dysfunction. The purpose of the present study was to identify particular deficits in the executive function that would distinguish children with BECTS from children with TLE. METHODS: We prospectively evaluated 19 consecutive children and adolescents with TLE with hippocampal sclerosis (HS) (57...
June 13, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28621460/older-adults-display-diminished-error-processing-and-response-in-a-continuous-tracking-task
#20
Francisco L Colino, Harvey Howse, Angela Norton, Robert Trska, Anthony Pluta, Stephen J C Luehr, Todd C Handy, Olave E Krigolson
Advancing age is often accompanied by a decline in motor control that results in a decreased ability to successfully perform motor tasks. While there are multiple factors that contribute to age-related deficits in motor control, one unexplored possibility is that age-related deficits in our ability to evaluate motor output result in an increase in motor errors. In line with this, previous work from our laboratory demonstrated that motor errors evoked an error-related negativity (ERN)-a component of the human ERP associated with error evaluation originating within the human medial-frontal cortex...
June 16, 2017: Psychophysiology
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