Results 251 to 260 of about 340,557 (294)

Putamen coactivation during motor task execution

NeuroReport, 2008
Models of corticostriatal motor circuitry have focused on the role of the circuit in the hemisphere of the motor cortex providing primary control (contralateral to the movement). We used functional magnetic resonance imaging and functional connectivity analyses to study circuit function in both the controlling and noncontrolling hemispheres. During the
William R, Marchand, James N, Lee, John W, Thatcher, Edward W, Hsu, Esther, Rashkin, Yana, Suchy, Gordon, Chelune, Jennifer, Starr, Sharon Steadman, Barbera   +8 more
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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
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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, Mattingley, JB, Sheppard, DM, Lee, P, Bradshaw, JL   +4 more
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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
E B, Montgomery, S R, Buchholz
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Executive Function and Motor Skill Learning

1997
Publisher Summary Evidence from behavioral studies of patients with cerebellar atrophy implies that the cerebellum plays a role in visuomotor learning and adaptation, planning, strategic thinking, time processing, and associative learning. Evidence from studies using functional neuroimaging supports this implication and substantiates the hypothesis ...
M, Hallett, J, Grafman
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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, M P, Bucci, M, Bernotas, F, Zamfirescu   +3 more
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Comparison of Functional Connectivity during Visual-Motor Illusion, Observation, and Motor Execution

Journal of Motor Behavior, 2021
This study investigated the functional connectivity during visual-motor illusion and compared it with observation and motor execution using functional near-infrared spectroscopy (fNIRS). Thirty subjects were randomly assigned to: illusion, observation, and motor execution group.
Katsuya, Sakai, Junpei, Tanabe, Keisuke, Goto, Ken, Kumai, Yumi, Ikeda   +4 more
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Understanding design fluency: Motor and executive contributions

Journal of the International Neuropsychological Society, 2009
AbstractDesign Fluency (DF) is typically assumed to assess planning, cognitive flexibility, and fluency in generation of visual patterns, above and beyond contributions from motor speed (Delis, Kaplan, & Kramer, 2001; Ruff, 1998). The present study examined these assumptions, as little construct validation research has been done in the past.
Yana, Suchy, Matthew L, Kraybill, Jennifer C, Gidley Larson   +2 more
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Executive function and motor planning

2011
This chapter shows that executive functions and motor planning are impaired in Williams syndrome (WS). It assesses inhibition (such as inhibition of a prepotent response) and its influence on social functioning, and evaluates how the cascading developmental effects of poor planning ability impact on the wider functioning of other aspects of cognition ...
Hudson, Kerry D., Farran, Emily K.
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Dystonia: A disorder of motor programming or motor execution?

Movement Disorders, 2002
AbstractFor some time, dystonia has been seen as purely a motor disorder. Relatively novel concepts published approximately 10 years ago also presumed that in the development of dystonic dyskinesias, only motor behaviour was abnormal. Neurophysiological observations of various types of dystonic disorders, which were performed using sophisticated ...
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