Analyses of weight-bearing asymmetry pattern for standing in the early phase after stroke: a cross-sectional study.

BACKGROUND: How the weight-bearing asymmetry pattern and related maximum lateral weight-bearing capacity, physical functions, balance, and mobility involved in weight-bearing asymmetry and lesions are related to weight-bearing asymmetry in patients with early-onset stroke remains unclear.

OBJECTIVE: To investigate the difference between weight-bearing in the early phase after stroke categorized as symmetrical or nonsymmetrical regarding impairments, balance, walking, and independence, and any lesion location difference.

METHODS: This cross-sectional study included 46 persons with hemiparetic stroke within 3 weeks from onset undergoing inpatient rehabilitation and classified into symmetrical, paretic, and non-paretic groups. We performed posturographic, functional, mobility, and lesion location assessments on participants once the evaluation was possible.

RESULTS: The symmetrical, paretic, and non-paretic groups included 14, 11, and 21 patients, respectively. The non-paretic group had lesser mean % body weight in maximum lateral weight-bearing to the paretic direction (79% versus 55%, p < .001), motor function of the hip lower limb (64 versus 58, p = .003) per the Stroke Impairment Assessment Set, Trunk Impairment Scale (18 versus 15, p = .020), and Berg Balance Scale (42 versus 32, p = .047) than the paretic group with more lesions in the insula (55% versus 0%, p < .001) and parietal cortex (36% versus 0%, p = .009) than the non-paretic group.

CONCLUSION: The non-paretic group had low dynamic balance, severe motor paresis, and trunk dysfunction. The paretic group had lesions in the insula or parietal cortex.