584 research outputs found
Can non-veridical body awareness influence action execution? Evidence from anosognosia for hemiplegia
Bimanual coupling paradigm as an effective tool to investigate productive behaviors in motor and body awareness impairments
When humans move simultaneously both hands strong coupling effects arise and neither of the two hands is able to perform independent actions. It has been suggested that such motor constraints are tightly linked to action representation rather than to movement execution. Hence, bimanual tasks can represent an ideal experimental tool to investigate internal motor representations in those neurological conditions in which the movement of one hand is impaired. Indeed, any effect on the âmovingâ (healthy) hand would be caused by the constraints imposed by the ongoing motor program of the âimpairedâ hand. Here, we review recent studies that successfully utilized the above-mentioned paradigms to investigate some types of productive motor behaviors in stroke patients. Specifically, bimanual tasks have been employed in left hemiplegic patients who report illusory movements of their contralesional limbs (anosognosia for hemiplegia). They have also been administered to patients affected by a specific monothematic delusion of body ownership, namely the belief that another personâs arm and his/her voluntary action belong to them. In summary, the reviewed studies show that bimanual tasks are a simple and valuable experimental method apt to reveal information about the motor programs of a paralyzed limb. Therefore, it can be used to objectively examine the cognitive processes underpinning motor programming in patients with different delusions of motor behavior. Additionally, it also sheds light on the mechanisms subserving bimanual coordination in the intact brain suggesting that action representation might be sufficient to produce these effects
Behavioral and neurophysiological indices of the racial bias modulation after virtual embodiment in other-race body
Physics data management tools: computational evolutions and benchmarks
The development of a package for the management of physics data is described:
its design, implementation and computational benchmarks. This package improves
the data management tools originally developed for Geant4 physics models based
on the EADL, EEDL and EPDL97 data libraries. The implementation exploits recent
evolutions of the C++ libraries appearing in the C++0x draft, which are
intended for inclusion in the next C++ ISO Standard. The new tools improve the
computational performance of physics data management.Comment: 6 pages, to appear in proceedings of the Joint International
Conference on Supercomputing in Nuclear Applications and Monte Carlo 2010
(SNA + MC2010
Reaction time to foveal stimuli as a function of eye position and attentional set in neglect patients
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