Filters








123 Hits in 8.0 sec

Oral presentations

2012 Cognitive Processing  
In this study, effects of manual experience on infants' ability to mentally rotate objects were investigated using the violation-of- S40 Cogn Process (2012) 13 (Suppl 1):S37-S54 Behavioral studies indicate  ...  that there is a relation between numbers and space (DeHevia et al., 2008).  ...  Typical symptoms of neglect are rightward errors in line bisection and left-side deficits in visual search task.  ... 
doi:10.1007/s10339-012-0511-7 fatcat:ymbuaxidgzdzrgoewq5rnuqhtm

Force-Field Compensation in a Manual Tracking Task

Valentina Squeri, Lorenzo Masia, Maura Casadio, Pietro Morasso, Elena Vergaro, Paul L. Gribble
2010 PLoS ONE  
The two sub-tasks are correlated because the lateral force the subject must exert on the eight-shape must be proportional to the longitudinal movement speed in order to perform a good tracking.  ...  The results confirm that visuo-manual tracking is characterized by an intermittent control mechanism, in agreement with previous work; the novel finding is that the overall control patterns are not altered  ...  In summary, the subjects can track the target with a little lag (compatible with the spatial resolution of the task) and negligible lateral displacement.  ... 
doi:10.1371/journal.pone.0011189 pmid:20567516 pmcid:PMC2887367 fatcat:i3szhtemjzaapkvkidtcsxcmti

Motor Extinction: A Deficit of Attention or Intention?

T. David Punt, M. Jane Riddoch, Glyn W. Humphreys
2013 Frontiers in Human Neuroscience  
In this study, we investigate the nature of motor extinction in a patient (LR) with a right fronto-temporal lesion through the kinematic analysis of unimanual and bimanual circle-drawing movements.  ...  While the ipsi- and contralesional limbs performed comparably for unimanual movements, the contralesional limb demonstrated marked bradykinesia and hypometria during bimanual movements.  ...  In this study, we investigate the spatial and temporal characteristics of circle drawing in a subject with motor extinction.  ... 
doi:10.3389/fnhum.2013.00644 pmid:24137119 pmcid:PMC3797439 fatcat:b63k54d5grbnlf7nqnmt2k2lzm

Experimental Evaluation of a Mixed Controller That Amplifies Spatial Errors and Reduces Timing Errors

Laura Marchal-Crespo, Tanja Baumann, Michael Imobersteg, Steve Maassen, Robert Riener
2017 Frontiers in Robotics and AI  
Subjects trained two motor tasks using ARMin IV, a robotic exoskeleton for upper limb rehabilitation: follow circles with an ellipsoidal speed profile, and move along a 3D line following a complex speed  ...  We present a novel mixed guidance controller that combines haptic guidance and error amplification to simultaneously promote learning of the timing and spatial components of complex motor tasks.  ...  ACKNOWLEDGMENTS The authors gratefully acknowledge the contribution of Anja Gut, Killian Baur, Jaime Duarte, Verena Klamroth-Marganska, and Fabian Just.  ... 
doi:10.3389/frobt.2017.00019 fatcat:zef4xmuk5nelvkpjpgo6htgb3e

Separate visual representations in the planning and control of action

Scott Glover
2004 Behavioral and Brain Sciences  
The quasi-separa-Abstract: Evidence for a dichotomy between the planning of an action and its on-line control in humans is reviewed.  ...  Evidence from behavioral studies suggests that planning is influenced by a large array of visual and cognitive information, whereas control is influenced solely by the spatial characteristics of the target  ...  ACKNOWLEDGMENTS The authors acknowledge the support of the National Science Foundation and the Medical Research Foundation of Oregon ACKNOWLEDGMENTS This work was supported, in part, by NICHD Grant #5-  ... 
doi:10.1017/s0140525x04000020 fatcat:d5muixzatjbcnianzyenyh3bma

Separate visual representations in the planning and control of action

Scott Glover
2004 Behavioral and Brain Sciences  
Evidence for a dichotomy between the planning of an action and its on-line control in humans is reviewed.  ...  Evidence from behavioral studies suggests that planning is influenced by a large array of visual and cognitive information, whereas control is influenced solely by the spatial characteristics of the target  ...  ACKNOWLEDGMENTS The authors acknowledge the support of the National Science Foundation and the Medical Research Foundation of Oregon ACKNOWLEDGMENTS This work was supported, in part, by NICHD Grant #5-  ... 
pmid:15481943 fatcat:6gkhjow3tnacdhrcqepzvy2iw4

Imaging a cognitive model of apraxia: The neural substrate of gesture-specific cognitive processes

Philippe Peigneux, Martial Van der Linden, Gaetan Garraux, Steven Laureys, Christian Degueldre, Joel Aerts, Guy Del Fiore, Gustave Moonen, Andre Luxen, Eric Salmon
2004 Human Brain Mapping  
verbal command, imitation of familiar gestures, imitation of novel gestures, and an action-semantic task that consisted in matching objects for functional use.  ...  Based on the above considerations, we suggest and discuss a revised model for upper limb apraxia that might best account for both brain imaging findings and neuropsychological dissociations reported in  ...  P.P. was supported by PAI and FMRE. G.G. and S.L. are supported by FNRS.  ... 
doi:10.1002/hbm.10161 pmid:14755833 fatcat:dvgefh72cnem3czofmal5fpg34

Come together: human–avatar on-line interactions boost joint-action performance in apraxic patients

Matteo Candidi, Lucia M Sacheli, Vanessa Era, Loredana Canzano, Gaetano Tieri, Salvatore M Aglioti
2017 Social Cognitive and Affective Neuroscience  
To fill this gap, we measured interaction performance, behavioral and kinematic indexes of left-brain damaged patients with/without LA in a social reach-to-grasp task involving two different degrees of  ...  Voxel-based-Lesion-Symptom-Mapping indicated that impairments in low-interactive conditions were underpinned by lesions of premotor, motor and insular areas, and of the basal ganglia.  ...  BrainTrends has no financial or intellectual conflict of interest in connection with the manuscript. We would like to also thank Arran T. Reader for reviewing and editing the draft of this paper.  ... 
doi:10.1093/scan/nsx114 pmid:29140533 pmcid:PMC5714226 fatcat:tkhnla4r6bgylisc4xwrokdcda

Robot-assisted line bisection in patients with Complex Regional Pain Syndrome

Charlotte Verfaille, Lieve Filbrich, David Cordova Bulens, Philippe Lefèvre, Anne Berquin, Olivier Barbier, Xavier Libouton, Virginie Fraselle, Dominique Mouraux, Valéry Legrain, Benjamin A. Philip
2019 PLoS ONE  
It is suggested that CRPS patients can display difficulties to perform tasks requesting visuo-motor coordination, reflecting the complex cortical reorganization occurring in CRPS.  ...  By means of a robotic handle placed below the screen, they were asked to move a cursor, to reach and cross lines at their estimated midpoint.  ...  The second objective of our study aimed at testing whether bisection biases could depend on the spatial location of the lines in the workspace.  ... 
doi:10.1371/journal.pone.0213732 pmid:31048861 pmcid:PMC6497371 fatcat:kjmlm2veevac7hz7sl7theguuy

From statistical regularities in multisensory inputs to peripersonal space representation and body ownership: insights from a neural network model

Tommaso Bertoni, Elisa Magosso, Andrea Serino
2020 European Journal of Neuroscience  
Through the same mechanism, the network reproduced behavioural correlates of manipulations implicated in subjective body ownership: the invisible and the rubber hand illusion.  ...  Peripersonal space (PPS), the interface between the self and the environment, is represented by a network of multisensory neurons with visual (or auditory) receptive fields anchored to specific body parts  ...  The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.  ... 
doi:10.1111/ejn.14981 pmid:32965729 fatcat:7fqt5jg54regtml3n2jarb7sum

Somatosensory processes subserving perception and action

H. Chris Dijkerman, Edward H. F. de Haan
2007 Behavioral and Brain Sciences  
Further, tactile exploration of the characteristics of external objects can result in conscious perceptual experience and stimulus or object recognition.  ...  In addition, we find a second division between tactile information processing about external targets in service of object recognition and tactile information processing related to the body itself.  ...  In the second task, he was asked to indicate the position of the tactile target by pointing to its location on a drawing of the right hand (right picture).  ... 
doi:10.1017/s0140525x07001392 pmid:17705910 fatcat:oaas3qlud5dk5dld6fxbt5cm5e

Final Program The 2013 International Neuropsychological Society Mid–Year Meeting July 10–13, 2013 Amsterdam, The Netherlands

2013 Journal of the International Neuropsychological Society  
Acknowledgements This study was funded in part by the Lundbeck Geriatric Medicine Grant Belgium.  ...  ., Judgment of Line Orientation, WAIS-IV Block Design). Visual memory for spatial content was more affected than memory for spatial location (WMS-IV). Grooved pegboard was slowed.  ...  Participants and Methods: We present the case of a patient (GR) with left unilateral neglect (LUN), after right-hemisphere-damage, who showed high IIV in performance on some visuo-spatial tests, completed  ... 
doi:10.1017/s1355617713001033 fatcat:55ykcdrjcrffplpcaebwtrcew4

Recovery of stereopsis in human adults with strabismus through perceptual learning

J. Ding, D. Levi
2010 Journal of Vision  
Methods: Three kinds of visual stimuli were prepared; words of objects/creatures, line drawings of objects/creatures and line drawings of meaningless objects.  ...  or visuo-spatial  ...  Here we investigate how local feature integration processes are modulated by stimulus shape and location, and the current task.  ... 
doi:10.1167/10.7.1124 fatcat:w3a4vu2hybhcvjwfqrryzzilbi

How We Do What We Want: A Neuro-Cognitive Perspective on Human Action Planning [chapter]

Bernhard Hommel
2006 Planning in Intelligent Systems  
In particular, the first step of action planning consists in specifying the features the action is intended to possess; this is achieved by activating the appropriate action-effect codes, i.e., sensory-motor  ...  Besides action planning they are involved in the perception of both one's own actions and actions of others.  ...  In this task, subjects are first rewarded for reacting towards an object hidden in location A. Then the object is placed in A again and then visibly moved to B, an adjacent location.  ... 
doi:10.1002/0471781266.ch2 fatcat:cscofpzb2vbovmapvy5lil7lri

Abstracts Presented at the International Neuropsychological Society, the Swiss Neuropshchological Society (SVNP), and the German Neuropsychological Society (GNP) Meeting, July 26–30, 2006, Zurich, Switzerland

2006 Journal of the International Neuropsychological Society  
We investigated neural recovery from spatial neglect in patients with right hemisphere lesions by means of fMRI using a spatial attention task for activation.  ...  Moreover, visual spatial working memory was studied by using the very same visual spatial template and stimuli: a) spatial locations and b) part of a route.  ...  OBJECTIVES: As handedness is an indicator of cerebral functional dominance, we expect performance differences between left -and right-handers in visuo-spatial tasks.  ... 
doi:10.1017/s1355617706069955 fatcat:weo5fxgnqja2tlehcvrqmenrqe
« Previous Showing results 1 — 15 out of 123 results