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(1) postural and suprapostural performance of a dual task would be differently affected by the strategy of task prioritization and (2) the cortical activation is different according to attentional focus strategies.
These hypothesis would be tested by gait performance, suprapostural accuracy and relative power spectrum of EEG.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Postural | Experimental | During training, participants in this group are instructed to focus on their posture during weight-shifting. |
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| Suprapostural | Experimental | During training, participants in this group are instructed to focus on their suprapostural task during weight-shifting. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Weight-shifting training | Behavioral | Postural task: Participants are standing with their weak side on the force plate. During the task, they wight-shift from side to side ranging from 10 to 90 percent of their body weight. Suprapostural task: Participants hold a tray with their arms beside the body, 90 degrees of elbow flexion. They rotate the tray left and right for 45 degrees respectively. During their task, participants should weight-shift and rotate the tray at the same time. |
| Measure | Description | Time Frame |
|---|---|---|
| EEG relative power in the delta band | postural and suprapostural performance of a dual task | 60 minutes |
| EEG relative power in the theta band | postural and suprapostural performance of a dual task | 60 minutes |
| EEG relative power in the alpha band | postural and suprapostural performance of a dual task | 60 minutes |
| EEG relative power in the beta band | postural and suprapostural performance of a dual task | 60 minutes |
| EEG relative power in the gamma band | postural and suprapostural performance of a dual task | 60 minutes |
| COP trajectory recorded from the force plate | performance of the postural task | 60 minutes |
| Angles from inclinometer | performance of the suprapostural task | 60 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| Gait velocity from GAITRite | gait performance | 5 minutes |
| Cadence from GAITRite | gait performance | 5 minutes |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| National Taiwan University | Taipei | Taiwan |
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|
| Mean step length from GAITRite | gait performance | 5 minutes |
| Step-to-step variability from GAITRite | gait performance | 5 minutes |