Evaluation of trunk sway in sit-to-stand motion using a pressure distribution measurement system

Abstract

Evaluation of trunk sway in sit-to-stand motion using a pressure distribution measurement system. Jpn J Compr Rehabil Sci 2012; 3: 6-10. Purpose: The majority of studies investigating sit-tostand (STS) motion have focused on the analysis of motion in the sagittal plane. We conducted a study using a pressure distribution measurement system known as BIG-MAT (BM) to investigate the bilateral asymmetry of STS. Method: Ten healthy men were asked perform STS movements while paying attention to their bilateral symmetry. We recorded the plantar pressure changes for both feet over the course of 15 rounds of STS. Based on the pressure sensitivity diagram obtained from the BM analysis, time-dependent changes in peak load pressure for both the left and right forefoot and hindfoot were evaluated. Results: Temporal bilateral differences in forefoot peak load were below 0.2 s in 50.3 ± 12.8% of subjects, more than 0.2 s in 45.0 ± 14.1% of subjects, and the peak itself was absent in in 4.0 ± 0.5% of subjects. Conclusion: Despite subjects attempting to remain aware of bilateral symmetry during STS movement, approximately 50% of STS motions were asymmetric. This study suggested the involvement of movements of the trunk, such as small rotations, lateral bendings, and lateral movements.

Characteristics of the pressure ratio of the gluteal and sole regions during sitting in acute stroke patients using a body pressure distribution measuring system

“…Characteristics of the pressure ratio of the gluteal and sole regions during sitting in acute stroke patients using a body pressure distribution measuring system because not only the gluteal, but also the sole pressure is landed. For this study, gluteal pressure and sole pressure were measured simultaneously using a body pressure measurement system [6] that has recently been introduced in the field of welfare technology as an instrument that can measure the sitting position state over time. In the present study, the system enabled the measurement of an objective index for the upright sitting position in acute stroke patients.…”