Results 11 - 20 of 1,234

Event-based prospective memory and executive control of working memory

by Richard L. Marsh, Jason L. Hicks, Richard L. Marsh, Jason L. Hicks, Department Of Psychol - Journal of Experimental Psychology: Learning, Memory, and Cognition , 1998
"... In 5 experiments, the character of concurrent cognitive processing was manipulated during an event-based prospective memory task. High- and low-load conditions that differed only in the difficulty of the concurrent task were tested in each experiment. In Experiments 1 and 2, attention-demanding task ..."
Abstract - Cited by 64 (15 self) - Add to MetaCart
In 5 experiments, the character of concurrent cognitive processing was manipulated during an event-based prospective memory task. High- and low-load conditions that differed only in the difficulty of the concurrent task were tested in each experiment. In Experiments 1 and 2, attention-demanding

Are anticorrelated networks in the brain relevant to schizophrenia? Schizophr

by Peter Williamson - Bull , 2007
"... Most models of schizophrenia are based on basal ganglia-thalamocortical (BGTC) neuronal circuits or brain struc-tures that project to them. Two new neuronal networks have been described which include many of the brain regions associated with BGTC neuronal circuits. These net-works have been characte ..."
Abstract - Cited by 18 (1 self) - Add to MetaCart
characterized with a new brain-imaging technique based on low-frequency fluctuations of the blood oxygen level–dependent (BOLD) signal. The new network associated with attention-demanding tasks is referred to as the task-related network and the network associated with stimulus-independent thought during

Oxygen Level and LFP in Task-Positive and Task-Negative Areas: Bridging BOLD fMRI and Electrophysiology

by William J Bentley , Jingfeng M Li , Abraham Z Snyder , Marcus E Raichle , Lawrence H Snyder , Jingfeng M Li
"... Abstract The human default mode network (DMN) shows decreased blood oxygen level dependent (BOLD) signals in response to a wide range of attention-demanding tasks. Our understanding of the specifics regarding the neural activity underlying these "tasknegative" BOLD responses remains incom ..."
Abstract - Add to MetaCart
Abstract The human default mode network (DMN) shows decreased blood oxygen level dependent (BOLD) signals in response to a wide range of attention-demanding tasks. Our understanding of the specifics regarding the neural activity underlying these "tasknegative" BOLD responses remains

Differential Attention-Dependent Response Modulation across Cell Classes in Macaque Visual Area V4

by Jude F. Mitchell, Kristy A. Sundberg, John H. Reynolds - NEURON , 2007
"... The cortex contains multiple cell types, but studies of attention have not distinguished between them, limiting understanding of the local circuits that transform attentional feedback into improved visual processing. Parvalbumin-expressing inhibitory interneurons can be distinguished from pyramidal ..."
Abstract - Cited by 53 (6 self) - Add to MetaCart
neurons based on their briefer action potential durations. We recorded neurons in area V4 as monkeys performed an attention-demanding task. We find that the distribution of action potential durations is strongly bimodal. Neurons with narrow action potentials have higher firing rates and larger attention

Differences in function and safety between medicare functional classification

by PhD Brian J Hafner , ; , MD Douglas G Smith
"... Abstract-The functional differences between persons with amputation who are classified as Medicare Functional Classification Level (MFCL)-2 and -3 include the abilities to walk at various cadences and to negotiate environmental barriers outside the home. This study compared the effect of active mic ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
microprocessor control and passive mechanical control of the prosthetic knee on function and safety in 17 subjects with transfemoral amputation (8 MFCL-2 and 9 MFCL-3). Assessed functional tasks included hill and stair descent, an attentional demand task, and an obstacle course. Self-reported measures included

SYSTEMATIC REVIEW Changes in Standing and Walking Performance Under Dual-Task Conditions Across the Lifespan

by Jan Ruffieux, Martin Keller, Benedikt Lauber, Wolfgang Taube , 2015
"... The Author(s) 2015. This article is published with open access at Springerlink.com Abstract Simultaneous performance of a postural and a concurrent task is rather unproblematic as long as the pos-tural task is executed in an automatic way. However, in si-tuations where postural control requires mor ..."
Abstract - Add to MetaCart
more central processing, cognitive resources may be exceeded by the addition of an attentionally demanding task. This may lead to interference between the two tasks, manifested in a decreased performance in one or both tasks (dual-task costs). Owing to changes in attentional demands of postural tasks

Autonomic Prediction of Error-related ERP Components in Perceptual and Conceptual Tasks in Older and Younger Adults

by Karen J. Mathewson , 2002
"... In studies of cognitive processing, the allocation of attention has been consistently linked to subtle, phasic adjustments in autonomic control. Both autonomic control of heart rate and control of the allocation of attention are known to decline with age. It is not known, however, whether characteri ..."
Abstract - Add to MetaCart
characteristic individual differences in autonomic control and the ability to control attention are closely linked. To test this, a measure of parasympathetic function, vagal tone (VT) was computed from cardiac recordings from older and younger adults taken before and during performance of two attention-demanding

Journal of Rehabil itation Research & Development Effects of vibrating insoles on standing balance in diabetic neuropathy

by Juha M. Hijmans, Wiebren Zijlstra, At L. Hof, Klaas Postema
"... Abstract—This study investigated the effects on standing bal-ance of random vibrations applied to the plantar side of the feet by vibrating insoles in subjects with neuropathy and nondisabled subjects. In four different conditions (eyes open or closed and with or without an attention-demanding task ..."
Abstract - Add to MetaCart
Abstract—This study investigated the effects on standing bal-ance of random vibrations applied to the plantar side of the feet by vibrating insoles in subjects with neuropathy and nondisabled subjects. In four different conditions (eyes open or closed and with or without an attention-demanding task

Primary visual cortex activity along the apparent-motion trace reflects illusory perception

by Lars Muckli, Axel Kohler, Nikolaus Kriegeskorte, Wolf Singer, Plos Biology - PLoS Biol , 2005
"... The illusion of apparent motion can be induced when visual stimuli are successively presented at different locations. It has been shown in previous studies that motion-sensitive regions in extrastriate cortex are relevant for the processing of apparent motion, but it is unclear whether primary visua ..."
Abstract - Cited by 42 (8 self) - Add to MetaCart
that apparent motion caused a blood-oxygenation-level-dependent response along the V1 representations of the apparent-motion path, including regions that were not directly activated by the apparent-motion-inducing stimuli. This response was unaltered when participants had to perform an attention-demanding task

Summary

by Ewa Wojciulik, Nancy Kanwisher
"... Functional magnetic resonance imaging (fMRI) was used to determine whether different kinds of visual attention rely on a common neural substrate. Within one session, subjects performed three different atten-tion experiments (each comparing an attentionally demanding task with an easier task using id ..."
Abstract - Add to MetaCart
Functional magnetic resonance imaging (fMRI) was used to determine whether different kinds of visual attention rely on a common neural substrate. Within one session, subjects performed three different atten-tion experiments (each comparing an attentionally demanding task with an easier task using
Results 11 - 20 of 1,234