Stroke
Conditions
Keywords
perturbed walking, stepping response
Brief summary
A control and a post-stroke subject with right-side chronic hemiparesis were studied. The post-stroke subject underwent 30 sessions of balance-perturbed training while walking on an instrumented treadmill where the Balance Assessment Robot (BAR™) randomly delivered pushes to pelvis in various directions at various speeds and at various perturbation amplitudes. The investigators assessed kinematics, kinetics, electromiography and spatio-temporal responses to outward-directed perturbations commencing either at foot contact of the left or the right leg.
Detailed description
For a detailed description of the study, see the Arms and Interventions section.
Interventions
DEVICEBalance Assessment Robot (BAR™)
The BAR™ has got six degrees of freedom (DOF) that interface to the pelvis of a walking subject. Five DOFs (translation of pelvis in sagittal, lateral and vertical directions; pelvic rotation and pelvic list) are actuated and admittance-controlled, providing transparent haptic interaction with negligible power transfer; the remaining DOF (pelvic tilt) is passive. The BAR™ is capable of delivering perturbations in the directions forward/backward and left/right, but for the purpose of this study only outward perturbations in the frontal plane were considered.
Sponsors
University Rehabilitation Institute, Republic of Slovenia
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DEVICE_FEASIBILITY
Masking
NONE
Eligibility
Sex/Gender
MALE
Healthy volunteers
Yes
Inclusion criteria
* Case: community-dwelling, high-functioning stroke survivor * Control: healthy volunteer, height- and weight-matched to the Case
Exclusion criteria
* any disease or injury affecting cognition * any disease or injury affecting balance or gait
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in centre of mass of the Case | Assessment at session no. 3 (during week 1) and session no. 30 (during week 10) | For the purpose of qualitative assessment of kinematics and kinetics |
| Change in ground reaction force of the Case | Assessment at session no. 3 (during week 1) and session no. 30 (during week 10) | For the purpose of qualitative assessment of kinematics and kinetics |
| Change in centre of pressure of the Case | Assessment at session no. 3 (during week 1) and session no. 30 (during week 10) | For the purpose of qualitative assessment of kinematics and kinetics |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Centre of pressure of the Control | During the only session (i.e., session 1 on day 1) | For the purpose of qualitative assessment of spatio-temporal characteristics of stepping |
| Centre of mass of the Control | During the only session (i.e., session 1 on day 1) | For the purpose of qualitative assessment of spatio-temporal characteristics of stepping |
| Ground reaction force of the Control | During the only session (i.e., session 1 on day 1) | For the purpose of qualitative assessment of spatio-temporal characteristics of stepping |
Other
| Measure | Time frame | Description |
|---|---|---|
| Step width | During both assessment sessions for the Case (i.e., session no. 3 during week 1, and session no. 30 during week 10); during the only session (i.e., session 1 on day 1) for the Control | For the purpose of qualitative assessment of spatio-temporal characteristics of stepping |
| Electromiography (at M. tibialis anterior, M. soleus, M. gastrocnemius lat., M. gastrocnemius med., M. rectus femoris, M. semitendinosus, M. gluteus med., M. gluteus max.) | During both assessment sessions for the Case (i.e., session no. 3 during week 1, and session no. 30 during week 10); during the only session (i.e., session 1 on day 1) for the Control | For the purpose of qualitative assessment |
| Step time | During both assessment sessions for the Case (i.e., session no. 3 during week 1, and session no. 30 during week 10); during the only session (i.e., session 1 on day 1) for the Control | For the purpose of qualitative assessment of spatio-temporal characteristics of stepping |
| Step length | During both assessment sessions for the Case (i.e., session no. 3 during week 1, and session no. 30 during week 10); during the only session (i.e., session 1 on day 1) for the Control | For the purpose of qualitative assessment of spatio-temporal characteristics of stepping |
Countries
Slovenia
Outcome results
None listed