TY - JOUR
T1 - Within-session acquisition of anticipatory postural adjustments during forward reaching task
AU - Liu, Wen Yu
AU - Lin, Yang Hua
AU - Lien, Hen Yu
AU - Hsu, Lin Ya
AU - Tsai, Yi Ju
AU - Liao, Chia Fang
AU - Tang, Simon Fuk Tan
N1 - Funding Information:
The study was supported in part by a grant from the Chang- Gung Memorial Hospital, Taiwan, ROC (CMRPD160431 to Liu). We are particularly grateful to the subjects for their participation in this study. In addition, the authors thank Alice MK Wong, MD and Chia-Lin Chen, MD, PhD for their contribution as the members of the expert committees in this study.
PY - 2015/2
Y1 - 2015/2
N2 - Objective: To describe the acquisition of anticipatory postural adjustment (APA) in healthy adults during standing forward reaching. Design: Repeated-measures design Subjects/Patients: Ten healthy subjects. Methods: Within one day, all subjects practiced forward reaching to a moving target for sixty trials (10 trials, 6 blocks). APAs were recorded by electromyography (EMG), center of pressure (COP), and kinematic measurements. Repeated measure ANOVA was used to compare the changes of APA among the six blocks. Results: All subjects showed basic APA patterns in the beginning, such as posterior shift of COP and tibialis anterior firing first. The adults demonstrated significantly quicker onset of posterior shift of COP between block 2 and 6 (p<0.05) and decreased muscle activation of ispilateral tibialis anterior between block 1 and 3 (p=0.01). Conclusions: The results suggested the acquisition process of APA could be observed after 50 trials of practice. Further study will need to verify the optimal practice trials in different populations with movement disorders.
AB - Objective: To describe the acquisition of anticipatory postural adjustment (APA) in healthy adults during standing forward reaching. Design: Repeated-measures design Subjects/Patients: Ten healthy subjects. Methods: Within one day, all subjects practiced forward reaching to a moving target for sixty trials (10 trials, 6 blocks). APAs were recorded by electromyography (EMG), center of pressure (COP), and kinematic measurements. Repeated measure ANOVA was used to compare the changes of APA among the six blocks. Results: All subjects showed basic APA patterns in the beginning, such as posterior shift of COP and tibialis anterior firing first. The adults demonstrated significantly quicker onset of posterior shift of COP between block 2 and 6 (p<0.05) and decreased muscle activation of ispilateral tibialis anterior between block 1 and 3 (p=0.01). Conclusions: The results suggested the acquisition process of APA could be observed after 50 trials of practice. Further study will need to verify the optimal practice trials in different populations with movement disorders.
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U2 - 10.1016/S0303-8467(15)30013-5
DO - 10.1016/S0303-8467(15)30013-5
M3 - Article
C2 - 25683314
AN - SCOPUS:84922592067
VL - 129
SP - S53-S57
JO - Clinical Neurology and Neurosurgery
JF - Clinical Neurology and Neurosurgery
SN - 0303-8467
IS - S1
ER -