Adaptation changes in dynamic postural control and contingent negative variation during backward disturbance by transient floor translation in the elderly.
Adaptation changes in dynamic postural control and contingent negative variation during backward disturbance by transient floor translation in the elderly.
复制标题
老年人在瞬态地板翻译中，在向后干扰期间的动态姿势控制和偶然性负变化的适应变化。
DOI：
10.1186/1880-6805-31-12
复制
发表时间：
2012-05-24
影响因子：
3.1
通讯作者：
Yaguchi C
中科院分区：
文献类型：
--
作者：
Fujiwara K;Maekawa M;Kiyota N;Yaguchi C
We investigated adaptation changes in dynamic postural control and contingent negative variation (CNV) in 13 young and 12 elderly adults. Subjects repeatedly underwent backward postural disturbance by a forward floor translation (S2) 2 s after an auditory warning signal (S1). Initial and second sets were conducted, each set with 20 trials. Posterior peak position of the center of pressure in the anteroposterior direction (CoPy) after S2 was identified. Electroencephalograms from Cz were averaged for each set, and the CNV negative peak was identified. Compared with the first trial, the posterior peak position of CoPy changed significantly forward from the 12th trial in the young and from the 19th trial in the elderly during the initial set. The mean of the posterior peak position was more forward in second set than in the initial set for both groups and was significantly backward in the elderly compared to the young for both sets. These findings indicate that subjects in both groups adapted better to the postural disturbance in the second set than in the initial set, and the adaptation was later in the elderly. Late CNV in the young started to increase negatively from the middle of the S1-S2 period and peaked just before S2. Peak CNV amplitude was larger in the second set than in the initial set. In contrast, late CNV in the elderly exhibited no negative increase as in the young and peaked in the middle of the S1-S2 period, which was followed by gradual decreasing toward S2. No adaptive changes were found in late CNV for the elderly. It is conceivable that reduced activation of the frontal lobe may be one of the factors contributing to the decrease in postural adaptability in the elderly. The elderly may use various brain regions for the adaptation of dynamic postural control compared with the young.
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影响因子：
2.5
作者：
HORAK, FB;DIENER, HC
通讯作者：
DIENER, HC
影响因子：
5.5
作者：
Wu, T;Hallett, M
通讯作者：
Hallett, M
影响因子：
3.2
作者：
AMABILE, G;POZZESSERE, G;LAZZARI, R
通讯作者：
LAZZARI, R
影响因子：
6.7
作者：
Masud, T;Morris, RO
通讯作者：
Morris, RO
DOI：
10.2106/00004623-197557040-00012
发表时间：
1975-01-01
影响因子：
5.3
作者：
MURRAY, MP;SEIREG, AA;SEPIC, SB
通讯作者：
SEPIC, SB