Kinematic Analysis of Step Initiation by Stroke Patients

ONUMA Ryo, HOSHI Fumihiko, NISHIHARA Ken

doi:10.1589/rika.32.809

[Purpose] The principal aim of the present study was to conduct a kinematic analysis to elucidate anticipatory postural adjustments (APAs) during step initiation by stroke patients. [Subjects and Methods] The subjects were assigned to one of three groups (20 stroke patients, 9 healthy elderly persons, and 5 healthy adults), and step movements were measured using surface electromyograms of the bilateral tibialis anterior, soleus, and gluteus medius muscles, and center of gravity sway. [Results] In comparison with healthy adults, a delay in muscle latency was noted in stroke patients. Furthermore, control disorder was noted in the paretic soleus muscle during steps made by the paretic side, and in the paretic gluteus medius muscle during steps made on the non-paretic side. Center of pressure (COP) movement was found to be decreased in stroke patients, especially in the lateral direction. [Conclusion] The results of the present study suggest that delay in muscle latency, control disorder of the paretic side and decreased COP movement, especially in the lateral direction, occur in stroke patients.

Kinematic Analysis of Step Initiation by Stroke Patients

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