Results 241 to 250 of about 85,282 (282)

Tunable‐Threshold UV Dosimetry With Programmable Luminescent Tags via Oxygen‐Mediated Room‐Temperature Phosphorescence

open access: yesAdvanced Materials Technologies, EarlyView.
A fully organic UV threshold dosimeter is developed by exploiting the oxygen‐sensitive room‐temperature phosphorescence of a purely organic emitter in a polymer matrix. Upon reaching a specific cumulative UV dose, photochemical oxygen depletion triggers a sharp, high‐contrast emission.
Tim Achenbach   +3 more
wiley   +1 more source

Disentangling motor execution from motor imagery with the phantom limb [PDF]

open access: yesBrain, 2012
International audienceAmputees can move their phantom limb at will. These 'movements without movements' have generally been considered as motor imagery rather than motor execution, but amputees can in fact perform both executed and imagined movements ...
Estelle Raffin   +2 more
exaly   +5 more sources
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The striatum and motor cortex in motor initiation and execution

Brain Research, 1991
The participation of striatal and motor cortex neurons in motor initiation and execution was studied using single neuronal recording in 3 monkeys performing wrist flexion and extension stimulus-initiated reaction time tasks. Observations of 46 striatal neurons whose activity correlated with the tasks were compared to recordings of 59 task-related motor
Erwin B Montgomery, E B Montgomery
exaly   +3 more sources

Disrupting somatosensory processing impairs motor execution but not motor imagery

Human Movement Science, 2023
While motor imagery (MI) is thought to be 'functionally equivalent' with motor execution (ME), the equivalence of feedforward and feedback mechanisms between the two modalities is unexplored. Here, we tested the equivalence of these mechanisms between MI and ME via two experiments designed to probe the role of somatosensory processing (Exp 1), and ...
Tarri B, Jessey   +3 more
openaire   +2 more sources

Effects of tDCS on Cortical Motor Facilitation in Performing Motor Execution

2021 9th International Winter Conference on Brain-Computer Interface (BCI), 2021
This study aims to reveal how motor execution contributes to cortical motor facilitation during tDCS. Four healthy subjects were participated in two experimental protocols: (1) tDCS with task (i.e., right hand clenching) and (2) tDCS without task. Each subject underwent 3 sessions (before tDCS, tDCS, after tDCS) for each protocol. Oxygenated hemoglobin
Junmo Yang   +3 more
openaire   +1 more source

Speed of motor execution and apraxia

Journal of Clinical and Experimental Neuropsychology, 1997
We used a reaction time paradigm to explore the relationship between motor execution and apraxia. The task required reaching for one to three keys. The instruction was varied by introducing a model of a hand indicating which fingers to use. Whereas patients with right-brain damage were slower than controls regardless of condition, the performance of ...
J, Spatt, G, Goldenberg
openaire   +2 more sources

Surround inhibition in motor execution and motor imagery

Neuroscience Letters, 2016
Surround inhibition (SI) is a neural mechanism to focus neuronal activity and facilitate selective motor execution (ME). The aim of the present study was to investigate whether SI is also generated during motor imagery (MI). Furthermore, we investigated whether the extent of SI during MI depends on the strength of SI during ME and/or vividness of MI ...
Toshiyuki, Aoyama   +3 more
openaire   +2 more sources

Functional organization of the primary motor cortex characterized by event-related fMRI during movement preparation and execution

open access: yesNeuroscience Letters, 2003
Neuronal recording and neuroimaging studies have shown that the primary motor area (M1) not only participates in motor execution, but is also engaged during movement preparation.
Yu-Feng Zang, Fucang Jia, Xuchu Weng
exaly   +1 more source

MOTOR PREPARATION, MOTOR EXECUTION, ATTENTION, AND EXECUTIVE FUNCTIONS IN ATTENTION DEFICIT/HYPERACTIVITY DISORDER (ADHD)

Child Neuropsychology, 2005
Attention and executive functions were investigated in medicated and unmedicated children with ADHD combined type using a novel selective reaching task. This task involved responding as rapidly as possible to a target while at times having to ignore a distractor.
Klimkeit, EI   +4 more
openaire   +5 more sources

Motor execution is necessary to memorize disparity

Experimental Brain Research, 2000
Binocular saccades in response to briefly flashed, memorized disparate targets (different for the two eyes) become disconjugate following repeated trials. After 15 min of such training, the disconjugacy persists, even when the target to memorize is no longer disparate. This study examines the hypothesis that disparity memorization has a motor basis. We
Z, Kapoula   +3 more
openaire   +2 more sources

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