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Experimental Brain Research
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#1Noah J. Rosenblatt (RFUMS: Rosalind Franklin University of Medicine and Science)H-Index: 3
#2Nils Eckardt (University of Oldenburg)
Last. Christopher P. Hurt (UAB: University of Alabama at Birmingham)H-Index: 11
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Motor flexibility, the ability to employ multiple motor strategies to meet task demands, may facilitate ambulation in complex environments that constrain movements; loss of motor flexibility may impair mobility. The purpose of this study was to determine the effects of obesity (a specific model of mobility impairment) and advanced age on motor flexibility during a task that constrained foot placement while walking. Twenty-one community-dwelling obese (OB) and 25 normal weight (NW) older adults (...
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#1Jens Brehm Nielsen (UCPH: University of Copenhagen)H-Index: 121
#2Mark Schram Christensen (UCPH: University of Copenhagen)H-Index: 17
Last. Jakob Lorentzen (UCPH: University of Copenhagen)H-Index: 10
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Spastic movement disorder is characterized by reduced ability to selectively activate muscles with significant co-activation of antagonist muscles. It has traditionally been thought that hyperexcitable stretch reflexes have a central role in the pathophysiology and the clinical manifestations of the disorder. Here we argue that the main functional challenges for persons with spastic movement disorder are related to contractures, paresis, weak muscles and inappropriate central motor commands, whe...
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#1Matsya R. Thulasiram (UM: University of Manitoba)H-Index: 1
#2Ryan W. Langridge (UM: University of Manitoba)
Last. Jonathan J. Marotta (UM: University of Manitoba)H-Index: 17
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Previous investigations have uncovered a strong visual bias toward the index finger when reaching and grasping stationary or horizontally moving targets. The present research sought to explore whether the index finger or thumb would serve as a significant focus for gaze in tasks involving vertically translating targets. Participants executed right-handed reach-to-grasp movements towards upward or downward moving 2-D targets on a computer screen. When the target first appeared, participants made ...
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#1Darren M Kenney (McMaster University)
#2Shannon O’Malley (McMaster University)H-Index: 9
Last. Judith M. Shedden (McMaster University)H-Index: 13
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Self-motion perception is based on the integration of visual (optic flow) and vestibular (inertial) sensory information. Previous research has shown that the relative contribution of visual and vestibular cues can change in real time based on the reliability of that information. The present study assessed whether initial velocity and acceleration magnitude influence the relative contribution of these cues to the detection of self-acceleration. Participants performed a simple response time task w...
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#1Marta Castellano (Starlab)H-Index: 3
#2David Ibanez-Soria (Starlab)H-Index: 1
Last. Giulio RuffiniH-Index: 27
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Little is known about how transcranial alternating current stimulation (tACS) interacts with brain activity. Here, we investigate the effects of tACS using an intermittent tACS-EEG protocol and use, in addition to classical metrics, Lempel-Ziv-Welch complexity (LZW) to characterize the interactions between task, endogenous and exogenous oscillations. In a cross-over study, EEG was recorded from thirty participants engaged in a change-of-speed detection task while receiving multichannel tACS over...
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Gist perception refers to perceiving the substance or general meaning of a scene. To investigate its neuronal mechanisms, we used the steady-state visually evoked potential (SSVEP) method-an evoked oscillatory cortical response at the same frequency as a visual stimulus flickered at this frequency. Two neighboring stimuli were flickered at different frequencies f1 and f2, for example, a drawing of a sun on the left side of the screen flickering at 8.6 Hz and the drawing of a parasol on the right...
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#1Jordan J. Garner (UCI: University of California, Irvine)
#2Michael D'Zmura (UCI: University of California, Irvine)H-Index: 22
Visual self-motion information is known to contribute to postural control, but it is unclear precisely which aspects of visual motion information drive changes in posture. We report here results for standing humans which suggest that there is a speed of movement threshold that must be exceeded by a visual stimulus if a posture response is to be generated. We use signal-to-noise ratio (SNR) methods to measure the strength of steady-state visually evoked posture responses (SSVEPRs) to sinusoidal m...
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#1Jorik Nonnekes (Radboud University Nijmegen)H-Index: 16
#2Valeria Dibilio (Radboud University Nijmegen)H-Index: 5
Last. Weerdesteyn Vivian (Radboud University Nijmegen)H-Index: 28
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The need to perform multiple tasks more or less simultaneously is a common occurrence during walking in daily life. Performing tasks simultaneously typically impacts task performance negatively. Hypothetically, such dual-task costs may be explained by a lowered state of preparation due to competition for attentional resources, or alternatively, by a 'bottleneck' in response initiation. Here, we investigated both hypotheses by comparing 'StartReact' effects during a manual squeezing task under si...
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Top fields of study
Anatomy
Motor control
Stimulus (physiology)
Psychology
Neuroscience
Body movement