The effect of visual input on the temporal structure and center of pressure velocity in stroke survivors
Advisor Information
Mukul Mukherjee, PhD
Location
MBSC 201
Presentation Type
Poster
Start Date
6-3-2020 12:30 PM
End Date
6-3-2020 1:45 PM
Abstract
Stroke is one of the leading causes of long-term disability. Stroke survivors are faced with motor deficits that include unstable balance. Typically, healthy individuals are able to maintain balance through sensory feedback. However, with stroke survivors this interaction between the senses is disturbed. This disturbance could potentially be caused by a deterioration in vision. Vision is one of the key senses needed to help individuals determine their position and movement through space and maintaining balance. Stroke survivors and healthy age-matched participants performed one-minute quiet standing sessions with either their eyes opened or closed. Detrended fluctuation analysis was used to analyze the temporal structure of the center of pressure velocity. This analysis reveals time-scale dependent properties in human behavior. A significant effect of condition was shown for the alpha long time-scale in the anterior-posterior direction but no group or interaction effects were evident. Specifically, in the absence of vision, center of pressure velocity became less anti-persistent in the anterior-posterior direction. This means that in the absence of vision, postural fluctuations in the long-time scale became less feedback dependent. This would be necessary to allow the individual to maintain their balance with reliance on other sensory systems.
The effect of visual input on the temporal structure and center of pressure velocity in stroke survivors
MBSC 201
Stroke is one of the leading causes of long-term disability. Stroke survivors are faced with motor deficits that include unstable balance. Typically, healthy individuals are able to maintain balance through sensory feedback. However, with stroke survivors this interaction between the senses is disturbed. This disturbance could potentially be caused by a deterioration in vision. Vision is one of the key senses needed to help individuals determine their position and movement through space and maintaining balance. Stroke survivors and healthy age-matched participants performed one-minute quiet standing sessions with either their eyes opened or closed. Detrended fluctuation analysis was used to analyze the temporal structure of the center of pressure velocity. This analysis reveals time-scale dependent properties in human behavior. A significant effect of condition was shown for the alpha long time-scale in the anterior-posterior direction but no group or interaction effects were evident. Specifically, in the absence of vision, center of pressure velocity became less anti-persistent in the anterior-posterior direction. This means that in the absence of vision, postural fluctuations in the long-time scale became less feedback dependent. This would be necessary to allow the individual to maintain their balance with reliance on other sensory systems.