Anticipatory postural control associated with bilateral arm flexion and event-related potential in a Kanji Stroop-like task.
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. P300 of ERPs elicited by the target stimuli and onset timing of electromyographic activity in arm and postural muscles were measured.


RESULTS
Reaction time of the anterior deltoid (AD) was shorter and P300 amplitude larger in the order of control, congruent, and incongruent conditions. A distinct P515 component was recognized in ERPs under congruent and incongruent conditions. No significant difference among conditions was observed in onset timing of erector spinae, biceps femoris, or gastrocnemius activity with respect to AD.


CONCLUSIONS
Changes in cognitive processing and allocation of attentional resources according to task demands influence the onset timing of arm movement, but not that of anticipatory postural control, suggesting the presence of fixed synergy of arm movement and postural control.


CONCLUSIONS
These findings are important for understanding the effects of cognitive function on anticipatory postural control.
Shen
Xuezhu
X
Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-8640, Japan.
Fujiwara
Katsuo
K
Tomita
Hidehito
H
D000328:Adult; D000704:Analysis of Variance; D001132:Arm; D001288:Attention / Q000502:physiology*; D003118:Color Perception / Q000502:physiology; D004569:Electroencephalography; D004576:Electromyography / Q000379:methods; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D018482:Muscle, Skeletal / Q000294:innervation / Q000502:physiology; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D004856:Postural Balance / Q000502:physiology*; D011597:Psychomotor Performance; D011930:Reaction Time / Q000502:physiology; D055815:Young Adult