Results 261 to 270 of about 3,359,094 (282)
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Visual Imagery and Motor Phenomena in Acute Schizophrenia
British Journal of Psychiatry, 1967This paper deals briefly with a few clinical observations made in the course of studies of changes in subjective experience reported by young patients in the early stages of schizophrenia. These studies aimed at delineating the early schizophrenic clinical picture in as specific a manner as possible with a view to later experimental validation, and the
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Adolescent development of motor imagery in a visually guided pointing task
Consciousness and Cognition, 2007The development of action representation during adolescence was investigated using a visually guided pointing motor task (VGPT) to test motor imagery. Forty adolescents (24 males; mean age 13.1 years) and 33 adults (15 males; mean age 27.5 years) were instructed to both execute and imagine hand movements from a starting point to a target of varying ...
Choudhury, Suparna +3 more
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Visually guided motor imagery activates sensorimotor areas in humans
Neuroscience Letters, 1999Stimulus-related changes in ongoing electroencephalography (EEG) over sensorimotor areas were investigated during a visually cued motor imagery task. Four subjects were instructed to imagine one-sided hand movements in response to visual cue stimuli. The EEG was recorded from central areas using 27 electrodes set at distances of 2.5 cm.
G, Pfurtscheller +3 more
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Motor imagery in blind subjects: The influence of the previous visual experience
Neuroscience Letters, 2006Mental simulation of movements has been widely used to infer about representational aspects of action. On a daily basis, motor planning and execution depends crucially both upon vision and kinesthesia. What if the former is lost? In this study we investigate the physiological changes induced during a mental simulation task in subjects with early and ...
Luís Aureliano, Imbiriba +3 more
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Evidence for the online operation of imagery: Visual imagery modulates motor production in drawing
Behavioral and Brain Sciences, 2004One property of the emulator framework presented by Grush is that imagery operates off-line. Contrary to this viewpoint, we present evidence showing that mental rotation of a simple figure modulates low-level features of drawing articulation. This effect is dependent upon the type of rotation, suggesting a more integrative online role for imagery than ...
Smith, AD, Gilchrist, ID
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Enhancement of motor cortex EEG during motor imagery: a visual feedback training study
2019 IEEE International Conference on Computational Intelligence and Virtual Environments for Measurement Systems and Applications (CIVEMSA), 2019There are some limitations for the motor imagery Electroencephalogram (EEG) including low-spatial resolution, non-stationary and susceptible to noise interference. This study aims to enhance the EEG features via an visual feedback training process by improving the visual feedback training paradigm design, EEG signal acquisition and EEG signal analysis,
Si-Fan He +5 more
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Task-dependent engagements of the primary visual cortex during kinesthetic and visual motor imagery
Neuroscience Letters, 2017Motor imagery can be divided into kinesthetic and visual aspects. In the present study, we investigated excitability in the corticospinal tract and primary visual cortex (V1) during kinesthetic and visual motor imagery. To accomplish this, we measured motor evoked potentials (MEPs) and probability of phosphene occurrence during the two types of motor ...
Nobuaki, Mizuguchi +2 more
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Use of implicit motor imagery for visual shape discrimination as revealed by PET
Nature, 1995Positron emission tomography (PET) can be used to map brain regions that are active when a visual object (for example, a hand) is discriminated from its mirror form. Chronometric studies suggest that viewers 'solve' this visual shape task by mentally modelling it as a reaching task, implicitly moving their left hand into the orientation of any left ...
L M, Parsons +7 more
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Visual motor imagery predominance in professional Spanish dancers.
Somatosensory & motor research, 2020Purpose: The main objectives of the study were to analyse the predominant motor imagery modality used by professional Spanish dancers and to compare Spanish dancers' ability to perform mental motor imagery with that of non-dancers, and to analyse differences between male and female dancers.
Alba, Paris-Alemany +6 more
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Laterality in Parkinson's disease may predict motor and visual imagery abilities.
Functional neurology, 2018Experimental evidence suggests that motor imagery (MI) engages the same neural substrates supporting actual motor activities and is likely impaired when such substrates are damaged, as in Parkinson's disease (PD). MI intuitively relies on visual imagery (VI), because mental simulations of physical movements depend on the visual retrieval of these ...
Lo Monaco MR +8 more
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