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Executive functions

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https://www.readbyqxmd.com/read/28231626/default-mode-network-deactivation-to-smoking-cue-relative-to-food-cue-predicts-treatment-outcome-in-nicotine-use-disorder
#1
Claire E Wilcox, Eric D Claus, Vince D Calhoun, Srinivas Rachakonda, Rae A Littlewood, Jessica Mickey, Pamela B Arenella, Natalie Goodreau, Kent E Hutchison
Identifying predictors of treatment outcome for nicotine use disorders (NUDs) may help improve efficacy of established treatments, like varenicline. Brain reactivity to drug stimuli predicts relapse risk in nicotine and other substance use disorders in some studies. Activity in the default mode network (DMN) is affected by drug cues and other palatable cues, but its clinical significance is unclear. In this study, 143 individuals with NUD (male n = 91, ages 18-55 years) received a functional magnetic resonance imaging scan during a visual cue task during which they were presented with a series of smoking-related or food-related video clips prior to randomization to treatment with varenicline (n = 80) or placebo...
February 23, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28230732/effects-of-acute-blueberry-flavonoids-on-mood-in-children-and-young-adults
#2
Sundus Khalid, Katie L Barfoot, Gabrielle May, Daniel J Lamport, Shirley A Reynolds, Claire M Williams
Epidemiological evidence suggests that consumption of flavonoids (usually via fruits and vegetables) is associated with decreased risk of developing depression. One plausible explanation for this association is the well-documented beneficial effects of flavonoids on executive function (EF). Impaired EF is linked to cognitive processes (e.g., rumination) that maintain depression and low mood; therefore, improved EF may reduce depressionogenic cognitive processes and improve mood. Study 1: 21 young adults (18-21 years old) consumed a flavonoid-rich blueberry drink and a matched placebo in a counterbalanced cross-over design...
February 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28230419/the-association-between-physical-performance-and-executive-function-in-a-sample-of-rural-older-adults-from-south-carolina-usa
#3
Ryan S Falck, Sara Wilcox, John R Best, Jessica L Chandler, Teresa Liu-Ambrose
BACKGROUND: Mobility and executive functions (EFs) decline with age, although associations between mobility and EFs are less clear. This study examined relationships between different mobility measures and EFs among rural older adults. METHODS: This cross-sectional study recruited 56 older adults (60+ years) in rural South Carolina. Mobility was assessed via gait speed, timed up-and-go, chair stand, and as a composite physical performance score (PPS). EFs was assessed via Trail Making Test, semantic fluency, and phonemic fluency...
March 2017: Experimental Aging Research
https://www.readbyqxmd.com/read/28230407/explaining-discrepancies-in-assessment-protocols-trait-relevance-and-functional-equivalence
#4
Hedwig Teglasi, Jessica Ritzau, Catherine Sanders, Margaret J Kim, Arianna Scott
Inconsistencies among independent sources of information about psychological constructs are widely documented, but not adequately explained. Measurement error as the primary explanation, though historically popular, is no longer tenable. Yet, even as assessors acknowledge that various measures of the same construct are not necessarily interchangeable, there are no agreed upon frameworks to discern the unique contribution of each measure in multiinformant and multimethod assessment protocols. In this study, we focus on the relevance of the target trait in its measured contexts and on the functional equivalence of the trait across its measures (similar self-regulatory requirements for trait expression) as driving relations between scores...
February 23, 2017: Psychological Assessment
https://www.readbyqxmd.com/read/28229986/executive-function-training-for-children-with-attention-deficit-hyperactivity-disorder
#5
Lan Shuai, David Daley, Yu-Feng Wang, Jin-Song Zhang, Yan-Ting Kong, Xin Tan, Ning Ji
BACKGROUND: Accumulating evidence indicates that attention deficit hyperactivity disorder (ADHD) is associated with core deficits in executive function (EF) which predicts poorer academic and occupational functioning. This makes early intervention targeting EF impairments important to prevent long-term negative outcomes. Cognitive training is a potential ADHD treatment target. The present study aimed to explore the efficacy, feasibility, and acceptability of a cognitive training program (targeting child's multiple EF components and involving parent support in daily life), as a nonpharmacological intervention for children with ADHD...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28229372/measuring-inhibition-and-cognitive-flexibility-in-friedreich-ataxia
#6
Louise A Corben, Felicity Klopper, Monique Stagnitti, Nellie Georgiou-Karistianis, John L Bradshaw, Gary Rance, Martin B Delatycki
Friedreich ataxia (FRDA) is an autosomal recessive neurodegenerative disorder with subtle impact on cognition. Inhibitory processes and cognitive flexibility were examined in FRDA by assessing the ability to suppress a predictable verbal response. We administered the Hayling Sentence Completion Test (HSCT), the Trail Making Test, and the Stroop Test to 43 individuals with FRDA and 42 gender- and age-matched control participants. There were no significant group differences in performance on the Stroop or Trail Making Test whereas significant impairment in cognitive flexibility including the ability to predict and inhibit a pre-potent response as measured in the HSCT was evident in individuals with FRDA...
February 22, 2017: Cerebellum
https://www.readbyqxmd.com/read/28228789/long-term-outcome-of-grade-iii-and-iv-chondral-injuries-of-the-knee-treated-with-steadman-microfracture-technique
#7
Marco Pellegrino, Ermanno Trinchese, Michele Bisaccia, Giuseppe Rinonapoli, Luigi Meccariello, Gabriele Falzarano, Antonio Medici, Luigi Piscitelli, Pellegrino Ferrara, Auro Caraffa
INTRODUCTION: The aim of our study is to demonstrate the effectiveness of Steadman microfracture technique in the management of high-grade chondral defects at the level of the knee by clinical follow-ups at eleven years. MATERIALS AND METHODS: This is a study conducted on fifteen patients suffering from Outerbridge grade III and IV chondral lesions of the knee, who underwent Steadman microfracture surgery between 2003 and 2004. Selective exclusion criteria to prevent that other treatments or comorbidities could invalidate the results were used...
September 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/28228567/prolonged-sleep-duration-as-a-marker-of-early-neurodegeneration-predicting-incident-dementia
#8
Andrew J Westwood, Alexa Beiser, Nikita Jain, Jayandra J Himali, Charles DeCarli, Sanford H Auerbach, Matthew P Pase, Sudha Seshadri
OBJECTIVE: To evaluate the association between sleep duration and the risk of incident dementia and brain aging. METHODS: Self-reported total hours of sleep were examined in the Framingham Heart Study (n = 2,457, mean age 72 ± 6 years, 57% women) as a 3-level variable: <6 hours (short), 6-9 hours (reference), and >9 hours (long), and was related to the risk of incident dementia over 10 years, and cross-sectionally to total cerebral brain volume (TCBV) and cognitive performance...
February 22, 2017: Neurology
https://www.readbyqxmd.com/read/28227858/compensation-of-pulsation-artifacts-during-optical-imaging-with-and-without-cranial-chamber
#9
Alejandro Romero-Santiago, Philipp Flotho, Karsten Schwerdtfeger, Jacek Szczygielski, Matthias Hulser, Lars Haab, Daniel J Strauss, Alejandro Romero-Santiago, Philipp Flotho, Karsten Schwerdtfeger, Jacek Szczygielski, Matthias Hulser, Lars Haab, Daniel J Strauss, Daniel J Strauss, Alejandro Romero-Santiago, Jacek Szczygielski, Karsten Schwerdtfeger, Philipp Flotho, Lars Haab, Matthias Hulser
Functional Optical Imaging (OI) through the opened skull forms a group of Neuroimaging techniques characterized by a high temporal and spatial resolution on a meso-to macroscopic scale. State of the art OI experiments are generally difficult to execute, with a very timely surgical preparation preceding the experiment, that requires a skilled surgeon to mount a sealed imaging chamber onto the skull. The chamber reduces brain pulsation artifacts and swelling of the brain through movement restriction. In this work, we present preliminary results of a novel approach that does not rely on the usage of an imaging chamber with the goal to facilitate heavily the surgical animal preparation and to allow straightforward joint Electroencephalography - Optical Imaging recordings in the future...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227798/upper-limb-kinematics-of-adults-with-cerebral-palsy-on-bilateral-functional-tasks
#10
Carina Lott, Michelle J Johnson, Carina Lott, Michelle J Johnson, Carina Lott, Michelle J Johnson
Adults with cerebral palsy (CP) often show upper limb impairments which impact their ability to execute activities of daily living (ADLs). Three adults with CP and five healthy adults performed three types of bilateral and unilateral ADLs: drink, pour, and pick and place tasks. An affordable bilateral assessment system (BiAS) was used to measure wrist kinematic trajectories. Four metrics, total completion time, maximum velocity, smoothness, and phase difference, were used to evaluate each functional task. Overall, adults with CP took a longer time than the healthy subjects to complete all unilateral functional tasks with their non-dominant hand...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227769/identifying-the-effects-of-visceral-interoception-on-human-brain-connectome-a-multivariate-analysis-of-covariance-of-fmri-data
#11
Behnaz Jarrahi, Dante Mantini, Behnaz Jarrahi, Dante Mantini, Behnaz Jarrahi, Dante Mantini
Sources of variations in the neural circuitry of the human brain and interrelationship between intrinsic connectivity networks (ICNs) are still a matter of debate and ongoing research. Here, we applied a multivariate analysis of covariance (MANCOVA) based on high-dimensional independent component analysis (ICA) to identify the effects of interoception and related variables on human brain connectome. Fifteen healthy right-handed subjects (all females, age range 21 - 48 years; mean age = 30.3, SD = 8.7 years) underwent a blood-oxygen-level-dependent (BOLD) functional magnetic resonance imaging (fMRI) that included continuous intravesical saline infusion and drainage...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227534/quantifying-the-human-finger-reachable-space
#12
Trieu H Pham, Pubudu N Pathirana, Trieu H Pham, Pubudu N Pathirana, Trieu H Pham, Pubudu N Pathirana
Describing the flexibility of the hand using the reachable space concept has drawn the attention of many researchers in recent years. Existing approaches involving numerical techniques to obtain the reachable space are generally computationally expensive. In this study, we propose a resource-friendly approach to determine and quantify the bidimensional reachable space of the finger. The fundamental idea of the approach connects to a set of arc formulae for the boundary of the reachable space. These formulae of the boundary result a unique description to calculate the area of the reachable space using Green's theorem...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227510/feasibility-of-an-ultra-low-power-digital-signal-processor-platform-as-a-basis-for-a-fully-implantable-brain-computer-interface-system
#13
Po T Wang, Keulanna Gandasetiawan, Colin M McCrimmon, Alireza Karimi-Bidhendi, Charles Y Liu, Payam Heydari, Zoran Nenadic, An H Do, Po T Wang, Keulanna Gandasetiawan, Colin M McCrimmon, Alireza Karimi-Bidhendi, Charles Y Liu, Payam Heydari, Zoran Nenadic, An H Do, An H Do, Zoran Nenadic, Colin M McCrimmon, Keulanna Gandasetiawan, Payam Heydari, Alireza Karimi-Bidhendi, Po T Wang, Charles Y Liu
A fully implantable brain-computer interface (BCI) can be a practical tool to restore independence to those affected by spinal cord injury. We envision that such a BCI system will invasively acquire brain signals (e.g. electrocorticogram) and translate them into control commands for external prostheses. The feasibility of such a system was tested by implementing its benchtop analogue, centered around a commercial, ultra-low power (ULP) digital signal processor (DSP, TMS320C5517, Texas Instruments). A suite of signal processing and BCI algorithms, including (de)multiplexing, Fast Fourier Transform, power spectral density, principal component analysis, linear discriminant analysis, Bayes rule, and finite state machine was implemented and tested in the DSP...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227407/recursive-feature-elimination-for-biomarker-discovery-in-resting-state-functional-connectivity
#14
Hariharan Ravishankar, Radhika Madhavan, Rakesh Mullick, Teena Shetty, Luca Marinelli, Suresh E Joel, Hariharan Ravishankar, Radhika Madhavan, Rakesh Mullick, Teena Shetty, Luca Marinelli, Suresh E Joel, Suresh E Joel, Teena Shetty, Luca Marinelli, Rakesh Mullick, Hariharan Ravishankar, Radhika Madhavan
Biomarker discovery involves finding correlations between features and clinical symptoms to aid clinical decision. This task is especially difficult in resting state functional magnetic resonance imaging (rs-fMRI) data due to low SNR, high-dimensionality of images, inter-subject and intra-subject variability and small numbers of subjects compared to the number of derived features. Traditional univariate analysis suffers from the problem of multiple comparisons. Here, we adopt an alternative data-driven method for identifying population differences in functional connectivity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227196/low-cost-and-efficient-kurtosis-based-deflationary-ica-method-application-to-mrs-sources-separation-problem
#15
M Saleh, A Karfoul, A Kachenoura, L Senhadji, L Albera, M Saleh, A Karfoul, A Kachenoura, L Senhadji, L Albera, L Albera, L Senhadji, A Kachenoura, M Saleh, A Karfoul
Improving the execution time and the numerical complexity of the well-known kurtosis-based maximization method, the RobustICA, is investigated in this paper. A Newton-based scheme is proposed and compared to the conventional RobustICA method. A new implementation using the nonlinear Conjugate Gradient one is investigated also. Regarding the Newton approach, an exact computation of the Hessian of the considered cost function is provided. The proposed approaches and the considered implementations inherit the global plane search of the initial RobustICA method for which a better convergence speed for a given direction is still guaranteed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226907/exploring-various-orientation-measurement-approaches-applied-to-a-serious-game-system-for-functional-rehabilitation
#16
Halim Tannous, Dan Istrate, Aziz Benlarbi-Delai, Julien Sarrazin, Mohamad Idriss, Marie-Christine Ho Ba Tho, Tien Tuan Dao, Halim Tannous, Dan Istrate, Aziz Benlarbi-Delai, Julien Sarrazin, Mohamad Idriss, Marie-Christine Ho Ba Tho, Tien Tuan Dao, Tien Tuan Dao, Halim Tannous, Julien Sarrazin, Marie-Christine Ho Ba Tho, Mohamad Idriss, Dan Istrate, Aziz Benlarbi-Delai
Serious games have been established as a complementary tool for conventional rehabilitation. This trend proved to be beneficial for both experts and patients since the first are able to assign and monitor virtual reality games for their patients to be executed at home, and the latter are greatly motivated by the challenges of these games rather than the repeatable and boring rehabilitation movements. In a previous work, we proposed a serious game for lower limb rehabilitation of the musculoskeletal system using the Microsoft Kinect(TM) camera and a virtual environment...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225843/-poverty-and-mental-disability-in-the-criminal-law-the-invisibles
#17
Ezequiel N Mercurio
In recent decades neuroscience research show the negative consequences of poverty in cognitive development. Environmental factors, such as material deprivation, exposure to stressful situations, violence, nutritional deprivation, environmental toxins may shape the developing brain. The changes of the structure and function of the brain since prenatal stages and their consequences can remain stable throughout the life cycle except early interventions are made. Research investigating have found significant link between child poverty and function and structural brain focusing on prefrontal cortex (i...
May 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28225838/-mental-simulation-in-frontotemporal-dementia
#18
Daniel G Politis, Wanda Y Rubinstein, María E Tabernero
: There is a common network for perception and execution of actions necessary for the acquisition of Theory of Mind, and the mirror neuron system could be the neural substrate. OBJECTIVE: To study the presence of apraxia and their relationship to Theory of Mind in patients with behavioral variant of Frontotemporal Dementia. METHODS: 24 patients were assessed, and the cognitive praxis assessment battery and theory of mind were administered...
May 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28223949/how-you-move-is-what-i-see-planning-an-action-biases-a-partner-s-visual-search
#19
Dominik Dötsch, Cordula Vesper, Anna Schubö
Activating action representations can modulate perceptual processing of action-relevant dimensions, indicative of a common-coding of perception and action. When two or more agents work together in joint action, individual agents often need to consider not only their own actions and their effects on the world, but also predict the actions of a co-acting partner. If in these situations the action of a partner is represented in a functionally equivalent way to the agent's own actions, one may also expect interaction effects between action and perception across jointly acting individuals...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28223926/frontal-functional-connectivity-of-electrocorticographic-delta-and-theta-rhythms-during-action-execution-versus-action-observation-in-humans
#20
Claudio Babiloni, Claudio Del Percio, Susanna Lopez, Giancarlo Di Gennaro, Pier P Quarato, Luigi Pavone, Roberta Morace, Andrea Soricelli, Giuseppe Noce, Vincenzo Esposito, Vittorio Gallese, Giovanni Mirabella
We have previously shown that in seven drug-resistant epilepsy patients, both reaching-grasping of objects and the mere observation of those actions did desynchronize subdural electrocorticographic (ECoG) alpha (8-13 Hz) and beta (14-30) rhythms as a sign of cortical activation in primary somatosensory-motor, lateral premotor and ventral prefrontal areas (Babiloni et al., 2016a). Furthermore, that desynchronization was greater during action execution than during its observation. In the present exploratory study, we reanalyzed those ECoG data to evaluate the proof-of-concept that lagged linear connectivity (LLC) between primary somatosensory-motor, lateral premotor and ventral prefrontal areas would be enhanced during the action execution compared to the mere observation due to a greater flow of visual and somatomotor information...
2017: Frontiers in Behavioral Neuroscience
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