2010 Fiscal Year Final Research Report
Effects of visual stimulus, gaze movements and motorlearning on postural control of elderly subjects
| Project/Area Number |
20500436
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Rehabilitation science/Welfare engineering
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
FUKUSHIMA Junko Hokkaido University, 大学院・保健科学研究院, 教授 (40208939)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SAITO Hiroshi 北海道大学, 大学院・保健科学研究院, 助教 (60301917)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | 姿勢調節 / 予測的姿勢制御(APA) / 運動学習 / 転移 |
|---|
| Research Abstract |
To examine postural adjustment during gaze shift (eye-head movements), two different types of gaze shifts were tested ; 1) vertical gaze shifts, and 2) gaze shifts in depth (i.e., convergence and divergence). Finally, learning of postural
adjustment was examined. Major results were as follows ;
1) Anticipatory postural adjustment (APA) was observed preceding vertical gaze shift in both young and elderly healthy subjects. Downward gaze shift elicited APA more often than upward gaze shift. Elderly subjects showed EMG activity in tibialis anterior (TA) preceding upward gaze shift.
2) To investigate motor learning of postural control, we assigned young subjects to reaching movements which consisted of daily training of 100 times for 3 days, and after 3 days the training was discontinued. We assessed their performance on the 5th day and 90^<th> day. The reaching performance improved even on the 90^<th> day, indicating that the subjects showed retention of training effects. Moreover, the subjects who were trained on their dominant hands also showed improvements on non-dominant hands, suggesting the transfer or generalization effects. Latencies of APA measured as EMG activity of TAs were shortened together with the improvement of performance, and latency changes retained on the 90^<th> day, suggesting an involvement of the central nervous system in learning of postural control and performance.
|
