부산대학교 도서관

Background/Purpose: Impaired balance is prevalent in patients with type II diabetes mellitus (T2DM). The aim of the current study was to evaluate the role of sensory information in these patients. Methods: Stabilogram-diffusion analysis was utilized to categorize the balance into local and central control modes based on the center of pressure (CoP) data acquired from quiet standing tests of 36 patients with T2DM and 20 healthy individuals. Local control was considered the efforts of muscles to stiffen the joints. Central control was the mode in which sensory information is used. Open- and closed-eye conditions were added to detect other sensory sources during the standing. Traditional linear measures of stability were also calculated for anterior–posterior and mediolateral directions. Results: Results showed that sway area, pathlength, and maximum velocity of the CoP are higher in the T2DM group (p < 0.001) in open-eye condition, but they did not change in eyes closed (p > 0.158). Both the local and central control mechanisms can cause postural instability in AP direction in patients with T2DM (p < 0.017). Contrarily, diabetes had no effect on the ML direction (p > 0.051). Patients with T2DM had a significant delay (about 225 ms greater than the controls) in the use of sensory information reflected in the AP direction outputs (p < 0.009). Conclusion: The patients with T2DM had poorer stability due to the delayed use of the sensory information. Diabetic postural stability was not fully provided in comparison with the healthy people even with using the sensory information. Elimination of the visual feedback led to reduced postural balance in these patients. [ABSTRACT FROM AUTHOR]