What kind of motor strategies (angel strategy, hip strategy or stepping strategy) did you use when the base of support changed from two feet to one foot and sensory information was disturbed or eliminated?
- reduced your base of support (BOS) (standing on one foot)
Narrow base of support it is, less stable it is. The lifted leg position can put the center of mass or line of gravity out of the base of support and challenge the balance. To find more stable balance, fixes support strategies like hip or ankle strategy can be require. However, if it is insufficient to maintain the balance, change in support strategies can be employed.
In my experience, I used fixes support strategies.
- when you prevented the use of visual information (eyes closed)
Loss of visual information feedback, it is required to use more others sensory information elements (ex: vestibular, somatosensorial) and it can increase the stress in the entire system.
Depending individual, the visual system might be more reliant on visual feedback to maintain balance.
In my experience, I needed to use more extreme support strategies to facilitate the balance.
- when you prevented the use of both visual and vestibular information (eyes closed and lift the eyes towards the ceiling)
According about the last question, less sensory information feedback brings more stress in the entire system. Thus, bigger extreme support strategies might be necessary to redress the balance.
In my experience, I needed to use again extreme support strategies to facilitate the balance.
- when you fixed your eyes or turned your head
Head and eyes fixed give a constant source of information. Head moving with eyes fixed give a non-constant visual information and challenge the vestibular information at the same time. Therefore, it is increasing the process with a load on the system to maintain the balance.
Jehanne Crouzier 