IMPACT OF CANE IN POST-STROKE BRAKING IMPULSE
Presenter Type
UNO Graduate Student (Masters)
Major/Field of Study
Biomechanics
Other
Biomechanics
Advisor Information
Associate Professor
Location
MBSC Ballroom Poster # 1106 - G (Masters)
Presentation Type
Poster
Start Date
24-3-2023 1:00 PM
End Date
24-3-2023 2:15 PM
Abstract
Hemiplegic gait is a key indicator of stroke, characterized by impaired postural control, inability to generate force at push-off, and inability to efficiently transition from step to step during walking, this leads to slower walking velocity, shorter stride lengths, and longer stride time leading to a high risk of falls. In post-stroke individuals, braking forces absorbed by the leading limb are not correlated with the trailing limb propulsive forces and both which would appear similar in magnitude in healthy populations are not the same in stroke survivors, the paretic limb braking and the nonparetic limb propelling during double support. This reflects an altered control of the acceleration of the center of mass. Subject interactions with canes are not usually considered and quantitatively reported therefore understanding the relationship between cane and the bilateral braking force of hemiparetic post-stroke individuals is needed. The purpose of this study is to determine how the braking force generated through the paretic and nonparetic limb relates to the force generated on the assistive device. We hypothesize individuals with no experience with an assistive device will have a greater difference between Braking limb force and assistive device force, compared to individuals that rely on using an assistive device.
Methods
Twenty chronic post-stroke individuals were recruited for this study (8M, 12F); no history of assistive device use (N=7), history of assistive device use (N=6), and current dependence on an assistive device (N=7). Inclusion criteria included: age 19-80, single-chronic stroke, and ambulatory. Motion capture analysis using a full-body, 65-marker set was done using in-ground force plates and an instrumented cane. Subjects completed three conditions: walking with a cane using 5% of their body weight, walking with a cane comfortably, and walking without a cane. Real-time feedback of the cane was displayed for the light-support condition on a screen in front of the participant. Data processing was done in MATLAB. The braking impulse of the assistive device and the bilateral limb were calculated. Statistical analysis will include braking forces will be analyzed using two-way repeated measures ANOVAs.
Expected Findings
We expect to find improved bilateral braking force among poststroke individuals with a previous history of using a cane.
Scheduling
10:45 a.m.-Noon, 1-2:15 p.m., 2:30 -3:45 p.m.
IMPACT OF CANE IN POST-STROKE BRAKING IMPULSE
MBSC Ballroom Poster # 1106 - G (Masters)
Hemiplegic gait is a key indicator of stroke, characterized by impaired postural control, inability to generate force at push-off, and inability to efficiently transition from step to step during walking, this leads to slower walking velocity, shorter stride lengths, and longer stride time leading to a high risk of falls. In post-stroke individuals, braking forces absorbed by the leading limb are not correlated with the trailing limb propulsive forces and both which would appear similar in magnitude in healthy populations are not the same in stroke survivors, the paretic limb braking and the nonparetic limb propelling during double support. This reflects an altered control of the acceleration of the center of mass. Subject interactions with canes are not usually considered and quantitatively reported therefore understanding the relationship between cane and the bilateral braking force of hemiparetic post-stroke individuals is needed. The purpose of this study is to determine how the braking force generated through the paretic and nonparetic limb relates to the force generated on the assistive device. We hypothesize individuals with no experience with an assistive device will have a greater difference between Braking limb force and assistive device force, compared to individuals that rely on using an assistive device.
Methods
Twenty chronic post-stroke individuals were recruited for this study (8M, 12F); no history of assistive device use (N=7), history of assistive device use (N=6), and current dependence on an assistive device (N=7). Inclusion criteria included: age 19-80, single-chronic stroke, and ambulatory. Motion capture analysis using a full-body, 65-marker set was done using in-ground force plates and an instrumented cane. Subjects completed three conditions: walking with a cane using 5% of their body weight, walking with a cane comfortably, and walking without a cane. Real-time feedback of the cane was displayed for the light-support condition on a screen in front of the participant. Data processing was done in MATLAB. The braking impulse of the assistive device and the bilateral limb were calculated. Statistical analysis will include braking forces will be analyzed using two-way repeated measures ANOVAs.
Expected Findings
We expect to find improved bilateral braking force among poststroke individuals with a previous history of using a cane.