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https://www.readbyqxmd.com/read/28105890/multitasking-during-degraded-speech-recognition-in-school-age-children
#1
Tina M Grieco-Calub, Kristina M Ward, Laurel Brehm
Multitasking requires individuals to allocate their cognitive resources across different tasks. The purpose of the current study was to assess school-age children's multitasking abilities during degraded speech recognition. Children (8 to 12 years old) completed a dual-task paradigm including a sentence recognition (primary) task containing speech that was either unprocessed or noise-band vocoded with 8, 6, or 4 spectral channels and a visual monitoring (secondary) task. Children's accuracy and reaction time on the visual monitoring task was quantified during the dual-task paradigm in each condition of the primary task and compared with single-task performance...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/28104452/cystoviral-rna-directed-rna-polymerases-regulation-of-rna-synthesis-on-multiple-time-and-length-scales
#2
REVIEW
Sébastien Alphonse, Ranajeet Ghose
P2, an RNA-directed RNA polymerase (RdRP), is encoded on the largest of the three segments of the double-stranded RNA genome of cystoviruses. P2 performs the dual tasks of replication and transcription de novo on single-stranded RNA templates, and plays a critical role in the viral life-cycle. Work over the last few decades has yielded a wealth of biochemical and structural information on the functional regulation of P2, on its role in the spatiotemporal regulation of RNA synthesis and its variability across the Cystoviridae family...
January 16, 2017: Virus Research
https://www.readbyqxmd.com/read/28104413/cognitive-motor-dual-task-interference-a-systematic-review-of-neural-correlates
#3
REVIEW
Leone Carmela, Peter Feys, Lousin Moumdjian, Emanuele D'Amico, Mario Zappia, Patti Francesco
Cognitive-motor interference refers to dual-tasking (DT) interference (DTi) occurring when the simultaneous performance of a cognitive and a motor task leads to a percentage change in one or both tasks. Several theories exist to explain DTi in humans: the capacity-sharing, the bottleneck and the cross-talk theories. Numerous studies investigating whether a specific brain locus is associated with cognitive-motor DTi have been conducted, but not systematically reviewed. We aimed to review the evidences on brain activity associated with the cognitive-motor DT, in order to better understand the neurological basis of the CMi...
January 16, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28091178/behavioral-assessment-of-listening-effort-using-a-dual-task-paradigm
#4
Jean-Pierre Gagné, Jana Besser, Ulrike Lemke
Published investigations ( n = 29) in which a dual-task experimental paradigm was employed to measure listening effort during speech understanding in younger and older adults were reviewed. A summary of the main findings reported in the articles is provided with respect to the participants' age-group and hearing status. Effects of different signal characteristics, such as the test modality, on dual-task outcomes are evaluated, and associations with cognitive abilities and self-report measures of listening effort are described...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/28088064/improved-cognition-while-cycling-in-parkinson-s-disease-patients-and-healthy-adults
#5
Audrey A Hazamy, Lori J P Altmann, Elizabeth Stegemöller, Dawn Bowers, Hyo Keun Lee, Jonathan Wilson, Michael S Okun, Chris J Hass
Persons with Parkinson's disease (PD) are typically more susceptible than healthy adults to impaired performance when two tasks (dual task interference) are performed simultaneously. This limitation has by many experts been attributed to limitations in cognitive resources. Nearly all studies of dual task performance in PD employ walking or balance-based motor tasks, which are commonly impaired in PD. These tasks can be performed using a combination of one or two executive function tasks. The current study examined whether persons with PD would demonstrate greater dual task effects (DTEs) on cognition compared to healthy older adults (HOAs) during a concurrent cycling task...
January 11, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28080113/higher-order-cognitive-control-in-dual-tasks-evidence-from-task-pair-switching
#6
Patricia Hirsch, Sophie Nolden, Iring Koch
In the present study, we combined the psychological refractory period (PRP) paradigm with a novel task-pair switching logic which enabled us to isolate performance costs occurring at the global level of task-pairs. In Experiment 1, in which we used conceptually overlapping responses for Task 1 (T1) and Task 2 (T2), we generated 3 task-pairs by combining 1 of 3 visual tasks (T1) with an auditory task (T2). In addition to worse performance after a short SOA than a long SOA (i.e., PRP effect), we found impaired performance in n - 1 task-pair switches as compared to n - 1 task-pair repetitions (i...
January 12, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28079635/influences-of-age-obesity-and-adverse-drug-effects-on-balance-and-mobility-testing-scores-in-ambulatory-older-adults
#7
Eric Anson, Elizabeth Thompson, Brian L Odle, John Jeka, Zachary F Walls, Peter C Panus
BACKGROUND AND PURPOSE: The adverse effects of drugs may influence results on tests of mobility and balance, but the drug-specific impact is not identified when using these tests. We propose that a quantitative drug index (QDI) will assist in assessing fall risk based on these tests, when combined with other fall risk variables. METHODS: Fifty-seven community-dwelling older adults who could walk independently on a treadmill and had Mini-Mental State Examination (MMSE) scores equal to or greater than 24 participated...
January 10, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/28061431/effect-of-subthalamic-nucleus-deep-brain-stimulation-on-balance-in-parkinson-s-disease-a-static-posturographic-analysis
#8
Beatriz De la Casa-Fages, Fernando Alonso-Frech, Francisco Grandas
BACKGROUND: The effect of subthalamic deep brain stimulation on balance in Parkinson's disease remains unclear. OBJECTIVE: To evaluate the effect of subthalamic nucleus stimulation on balance in Parkinson's disease using posturography. METHODS: 16 patients (9 women) who underwent subthalamic deep brain stimulation [mean age 59.6 years (46-70); mean disease duration 15.6 years (7-25); mean duration of subthalamic stimulation 32.1 months (3...
December 29, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28056045/further-development-of-the-assessment-of-military-multitasking-performance-iterative-reliability-testing
#9
Margaret M Weightman, Karen L McCulloch, Mary V Radomski, Marsha Finkelstein, Amy S Cecchini, Leslie F Davidson, Kristin J Heaton, Laurel B Smith, Matthew R Scherer
The Assessment of Military Multitasking Performance (AMMP) is a battery of functional dual-tasks and multitasks based on military activities that target known sensorimotor, cognitive, and exertional vulnerabilities after concussion/mild traumatic brain injury (mTBI). The AMMP was developed to help address known limitations in post concussive return to duty assessment and decision making. Once validated, the AMMP is intended for use in combination with other metrics to inform duty-readiness decisions in Active Duty Service Members following concussion...
2017: PloS One
https://www.readbyqxmd.com/read/28055188/assembling-enzymatic-cascade-pathways-inside-virus-based-nanocages-using-dual-tasking-nucleic-acid-tags
#10
Melanie Brasch, Rindia M Putri, Mark V de Ruiter, Daniel Luque, Melissa S T Koay, José R Castón, Jeroen J L M Cornelissen
The packaging of proteins into discrete compartments is an essential feature for cellular efficiency. Inspired by Nature, we harness virus-like assemblies as artificial nanocompartments for enzyme-catalyzed cascade reactions. Using the negative charges of nucleic acid tags, we develop a versatile strategy to promote an efficient noncovalent co-encapsulation of enzymes within a single protein cage of cowpea chlorotic mottle virus (CCMV) at neutral pH. The encapsulation results in stable 21-22 nm sized CCMV-like particles, which is characteristic of an icosahedral T = 1 symmetry...
January 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28049003/cognitive-motor-interference-on-upper-extremity-motor-performance-in-a-robot-assisted-planar-reaching-task-among-patients-with-stroke
#11
Joon-Ho Shin, Gyulee Park, Duk Youn Cho
OBJECTIVE: To explore motor performance on two different cognitive tasks during robotic rehabilitation in which motor performance was longitudinally assessed. DESIGN: Prospective study SETTING: Rehabilitation hospital PARTICIPANTS: Patients with chronic stroke and upper extremity impairment (N=22) INTERVENTION: A total of 640 repetitions of robot-assisted planar reaching, five times a week for 4 weeks MAIN OUTCOME MEASURES: Longitudinal robotic evaluations regarding motor performance included smoothness, mean velocity, path error, and reach error by the type of cognitive task...
December 31, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28043057/a-narrative-review-of-texting-as-a-visually-dependent-cognitive-motor-secondary-task-during-locomotion
#12
REVIEW
T Krasovsky, P L Weiss, R Kizony
Typing while walking is an example of people's ability to interact with technology while engaged in real life activities. Indeed, an increasing number of studies have investigated the typing of text messages (texting) as a dual task during locomotion. The objective of this review is to (1) describe the task requirements of texting-while-walking, (2) evaluate the measurement and psychometric properties of texting as a dual task, and (3) formulate methodological recommendations for researchers who use and report on texting-while-walking...
December 22, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28041962/high-working-memory-load-impairs-the-effect-of-cognitive-reappraisal-on-emotional-response-evidence-from-an-event-related-potential-study
#13
Shuzhen Gan, Jianfeng Yang, Xuhai Chen, Xiuping Zhang, Yufang Yang
This study investigates how the working memory (WM) load influenced the efficacy of cognitive reappraisal, a frequently used strategy for emotion regulation. In a dual-task paradigm, the participants were required to perform a high-load or a low-load memory task and simultaneously reappraise aversive pictures with a negative or a neutral meaning. In the low-load condition, we found that the amplitude of emotion-enhanced late positive potential (LPP) was significantly decreased by neutral reappraisal compared to negative reappraisal...
December 30, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/28038440/the-effect-of-limited-cognitive-resources-on-communication-disturbances-in-serious-mental-illness
#14
P Le Thanh, Gina M Najolia, Kyle S Minor, Alex S Cohen
Semantically incoherent speech is a pernicious clinical feature of serious mental illness (SMI). The precise mechanisms underlying this deficit remain unclear. Prior studies have found that arousal of negative emotion exaggerates the severity of these communication disturbances; this has been coined "affective reactivity". Recent research suggests that "cognitive reactivity" may also occur, namely reflecting reduced "on-line" cognitive resources in SMI. We tested the hypothesis that communication disturbances manifest as a function of limited cognitive resources in SMI above and beyond that associated with state affectivity...
December 20, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/28038340/spatio-temporal-and-kinematic-gait-analysis-in-patients-with-frontotemporal-dementia-and-alzheimer-s-disease-through-3d-motion-capture
#15
Rosaria Rucco, Valeria Agosti, Francesca Jacini, Pierpaolo Sorrentino, Pasquale Varriale, Manuela De Stefano, Graziella Milan, Patrizia Montella, Giuseppe Sorrentino
Alzheimer's disease (AD) and behavioral variant of Frontotemporal Dementia (bvFTD) are characterized respectively by atrophy in the medial temporal lobe with memory loss and prefrontal and anterior temporal degeneration with dysexecutive syndrome. In this study, we hypothesized that specific gait patterns are induced by either frontal or temporal degeneration. To test this hypothesis, we studied the gait pattern in bvFTD (23) and AD (22) patients in single and dual task ("motor" and "cognitive") conditions...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28038330/the-effects-of-a-simultaneous-cognitive-or-motor-task-on-the-kinematics-of-walking-in-older-fallers-and-non-fallers
#16
Renato Campos Freire Júnior, Jaqueline Mello Porto, Nise Ribeiro Marques, Paola Errera Magnani, Daniela Cristina Carvalho de Abreu
Human gait has been widely investigated under dual-task conditions because it has been demonstrated to be an important way to uncover differences in gait biomechanics between older fallers and non-fallers. However, exactly how simultaneous tasks affect the kinematics of walking remains unclear. In the present study, gait kinematic properties of older fallers and non-fallers were compared under cognitive and motor dual-task conditions. The gait kinematic properties of interest were recorded under three different conditions: walking at preferred speed, walking when performing a cognitive task (naming animals), and walking when performing a motor task (transferring a coin from one pocket to the other)...
December 27, 2016: Human Movement Science
https://www.readbyqxmd.com/read/28031021/the-efficacy-of-treadmill-training-with-and-without-projected-visual-context-for-improving-walking-ability-and-reducing-fall-incidence-and-fear-of-falling-in-older-adults-with-fall-related-hip-fracture-a-randomized-controlled-trial
#17
Mariëlle W van Ooijen, Melvyn Roerdink, Marga Trekop, Thomas W J Janssen, Peter J Beek
BACKGROUND: The ability to adjust walking to environmental context is often reduced in older adults and, partly as result of this, falls are common in this population. A treadmill with visual context projected on its belt (e.g., obstacles and targets) allows for practicing step adjustments relative to that context, while concurrently exploiting the great amount of walking practice associated with conventional treadmill training. The present study was conducted to compare the efficacy of adaptability treadmill training, conventional treadmill training and usual physical therapy in improving walking ability and reducing fear of falling and fall incidence in older adults during rehabilitation from a fall-related hip fracture...
December 28, 2016: BMC Geriatrics
https://www.readbyqxmd.com/read/28028863/stress-and-gender-effects-on-prefrontal-cortex-oxygenation-levels-assessed-during-single-and-dual-task-walking-conditions
#18
Roee Holtzer, Chelsea Schoen, Eleni Demetriou, Jeannette R Mahoney, Meltem Izzetoglu, Cuiling Wang, Joe Verghese
The ability to walk is critical for functional independence and wellbeing. The pre-frontal cortex (PFC) plays a key role in cognitive control of locomotion, notably under attention-demanding conditions. Factors that influence brain responses to cognitive demands of locomotion, however, are poorly understood. Herein, we evaluated the individual and combined effects of gender and perceived stress on stride velocity and PFC Oxygenated Hemoglobin (HbO2 ) assessed during single and dual-task walking conditions. The experimental paradigm included Normal Walk (NW); Cognitive Interference (Alpha); and Walk-While-Talk (WWT) tasks...
December 28, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28028775/effects-of-a-no-go-task-2-on-task-1-performance-in-dual-tasking-from-benefits-to-costs
#19
Markus Janczyk, Lynn Huestegge
When two tasks are combined in a dual-task experiment, characteristics of Task 2 can influence Task 1 performance, a phenomenon termed the backward crosstalk effect (BCE). Besides instances depending on the (spatial) compatibility of both responses, a particularly interesting example was introduced by Miller (2006): If Task 2 was a no-go task (i.e., one not requiring any action at all), responses were slowed in Task 1. Subsequent work, however, also reported the opposite result-that is, faster Task 1 responses in cases of no-go Task 2 trials...
December 27, 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28024254/relation-between-temporal-perception-and-inhibitory-control-in-the-go-no-go-task
#20
Scott W Brown, Sara T Perreault
This research was designed to replicate and extend findings concerning bidirectional interference between concurrent timing and inhibition tasks reported previously. Subjects performed serial temporal production and Go/No-Go (GNG) tasks under single-task and dual-task conditions in two experiments. The degree of inhibitory control required in the GNG tasks was manipulated by varying the proportion of go and no-go stimuli (experiment 1) and by instructing subjects to devote different amounts of attention to the dual tasks (experiment 2)...
December 23, 2016: Acta Psychologica
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