Publications by authors named "Xuezhu Shen"

Background: We investigated the effect of time constraint on activation timing of postural muscles during bilateral arm flexion in self-timing, oddball and simple-reaction tasks.

Methods: Thirteen healthy adults flexed their arms from a suspended position with maximum speed and stopped at the shoulder level. For erector spinae-longissimus (ES), biceps femoris (BF), and gastrocnemius (GcM), onset timing of burst activation with respect to the anterior deltoid (AD), and the displacement of the center of pressure in the anteroposterior direction (CoPy) were analyzed.

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Objective: We investigated anticipatory postural control during arm flexion and event-related potential (ERP) in a Kanji Stroop-like task.

Methods: The Kanji for RED or BLUE colored in red, blue, or black was randomly presented on a screen for 100 ms. Subjects flexed their arms in response to target stimuli colored black (control condition) or which were congruent or incongruent with the meaning of Kanji characters.

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The P300 component of the event-related brain potential during the colored Kanji Stroop task was used in conjunction with response time to identify the locus of interference. Participants were instructed to respond to the colored Kanji characters as quickly as possible in the respective stimulus conditions. Response time varied with the congruence and incongruence stimulus conditions.

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During color, colored Kanji characters and Stroop task of the visual stimuli, the P300 component of the event-related brain potential (ERPs) was used in conjunction with response time to identify sex differences in perceptual processing. Participants were instructed to respond to the display colors and name colored Kanji characters as quickly as possible in the respective stimulus conditions. Response time varied in all stimulus conditions, the males took longer than females.

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