Abstract
Garland SJ, Willems DA, Ivanova TD, Miller KJ. Recovery of standing balance and functional mobility after stroke. Arch Phys Med Rehabil 2003;84:1753–9. Objective To examine the extent to which recovery of functional balance and mobility is accompanied by change in a few specific physiologic measures of postural control. Design Longitudinal prospective study. Setting Laboratory setting in Ontario. Participants Twenty-seven volunteers (age, 64.2±13.7y) undergoing 4 weeks of rehabilitation after stroke participated. At initial testing, patients were 32.7±18.4 days poststroke and exhibited a moderate level of motor recovery (lower-extremity and postural control, stages 3–4 on the Chedoke-McMaster Stroke Assessment Impairment Inventory). Interventions Not applicable. Main outcome measures Three functional measures (Berg Balance Scale, Clinical Outcome Variables Scale, gait speed) were assessed. Three physiologic measures (electromyographic data of hamstrings and soleus muscles bilaterally, postural sway, arm acceleration) were taken while subjects stood quietly on a force platform and while they performed a rapid shoulder flexion movement of the nonparetic upper extremity. Results After 1 month of rehabilitation, there was an overall significant improvement in all outcome measures (functional, physiologic). However, 10 patients failed to show any improvement in the electromyographic activation of hamstrings muscle on the paretic side in response to the rapid arm movement. These patients compensated by increasing the anticipatory activation of the nonparetic hamstrings. Conclusion After stroke, patients showed improvement in both physiologic and functional measures of balance and mobility over a 1-month period. We have identified some patients who may be using compensatory strategies to increase function. The factors that may predict those patients who are likely to use compensatory strategies awaits further study.
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