Clinical correlates of between-limb synchronization of standing balance control and falls during inpatient stroke rehabilitation

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http://www.naric.com/research/rehab/record.cfm?search=2&type=all&criteria=J64256&phrase=no&rec=119356
Abstract: Study examined the influence of clinical measures of sensorimotor control, functional balance, and fall risk on between-limb synchronization of balance control. The medical charts of 100 individuals with stroke admitted to inpatient rehabilitation were reviewed. Force plate-based measures were obtained while standing on 2 force plates, including postural sway: root mean square of anteroposterior and mediolateral center of pressure (COP); stance load asymmetry (percentage of body weight borne on the less-loaded limb); and between-limb synchronization (cross-correlation of the COP recordings under each foot). Clinical measures obtained were motor impairment (Chedoke-McMaster Stroke Assessment), plantar cutaneous sensation, functional balance (Berg Balance Scale), and falls experienced in rehabilitation. Results indicated that synchronization was significantly related to motor impairment and prospective falls, even when controlling for other force plate-based measures of standing balance control. Between-limb COP synchronization for standing balance appears to be a uniquely important index of balance control, independent of postural sway and load symmetry during stance.