نتایج جستجو برای: unimanual function

تعداد نتایج: 1213258  

Journal: :Journal of biomedical optics 2015
Jianwei Cao Bilal Khan Nathan Hervey Fenghua Tian Mauricio R Delgado Nancy J Clegg Linsley Smith Heather Roberts Kirsten Tulchin-Francis Angela Shierk Laura Shagman Duncan MacFarlane Hanli Liu George Alexandrakis

Sensorimotor cortex plasticity induced by constraint-induced movement therapy (CIMT) in six children (10.2±2.1 years old) with hemiplegic cerebral palsy was assessed by functional near-infrared spectroscopy (fNIRS). The activation laterality index and time-to-peak/duration during a finger-tapping task and the resting-state functional connectivity were quantified before, immediately after, and 6...

Journal: :Neuroscience 2009
S J Palmer L Eigenraam T Hoque R G McCaig A Troiano M J McKeown

Changes in effective connectivity during the performance of a motor task appear important for the pathogenesis of motor symptoms in Parkinson's disease (PD). One type of task that is typically difficult for individuals with PD is simultaneous or bimanual movement, and here we investigate the changes in effective connectivity as a potential mechanism. Eight PD subjects off and on l-DOPA medicati...

2015
Madhur Mangalam Nisarg Desai Mewa Singh

A practical approach to understanding lateral asymmetries in body, brain, and cognition would be to examine the performance advantages/disadvantages associated with the corresponding functions and behavior. In the present study, we examined whether the division of labor in hand usage, marked by the preferential usage of the two hands across manual operations requiring maneuvering in three-dimen...

Journal: :Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology 2006
Martin Eimer José van Velzen

OBJECTIVE We investigated whether covert unimanual response preparation triggers attention shifts, as postulated by the premotor theory of attention, and whether these result in spatially specific modulations of visual and auditory processing. METHODS Visual response cues instructed participants to prepare to lift their left or right index finger in response to a subsequent target stimulus. I...

Journal: :Journal of neurophysiology 2008
Eiichi Naito Filip Scheperjans Simon B Eickhoff Katrin Amunts Per E Roland Karl Zilles H Henrik Ehrsson

The question of how the brain represents the spatial relationship between the own body and external objects is fundamental. Here we investigate the neural correlates of the somatic perception of bimanual interaction with an external object. A novel bodily illusion was used in conjunction with functional magnetic resonance imaging (fMRI). During fMRI scanning, seven blindfolded right-handed part...

2017
Anouk J de Brouwer Tayler Jarvis Jason P Gallivan J Randall Flanagan

During goal-directed reaching, rapid visuomotor feedback processes enable the human motor system to quickly correct for errors in the trajectory of the hand that arise from motor noise and, in some cases, external perturbations. To date, these visuomotor responses, the gain of which is sensitive to features of the task and environment, have primarily been examined in the context of unimanual re...

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