Parkinsonism & related disorders · 2024
The effect of subjective postural vertical on forward flexed posture in Parkinson's disease.
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Shiraishi Makoto, Mikami Kyohei, Kamo Hikaru, Okuma Yasuyuki, Tsunemi Taiji, Fujimoto Kenichi, Kamo Tsutomu, Yokota Yuki, Nogawa Shigeru, Osada Takashi, Seki Morinobu, Nagayama Hiroshi, Hatano Taku, Nakajima Hideto, Suzuki Keisuke, Yamamoto Toshimasa, Yamano Yoshihisa, Hattori Nobutaka, Iijima Mutsumi
Аннотация
BACKGROUND: We developed a novel method to measure the angle of subjective postural vertical (SPV) and showed that the SPV may be related to the exacerbation of the forward flexed posture.
OBJECTIVES: The present study prospectively tested the effects of the subjective postural vertical on the exacerbation of the forward flexion of trunk (FFT) through long-term observation of Parkinson's disease patients.
METHODS: Evaluation of the posture included measuring FFT, the angle of lateral flexion of trunk, and the angle at the position that the patient subjectively perceived as the vertical position at a stationary upright position immediately after standing up at the time of initial observation, 6 months later, and 1 year later.
RESULTS: The SPV angles worsened significantly at 6 months and 1 year compared to the first measurements (9.3 ± 6.7° vs. 10.8 ± 8.2° and 10.6 ± 7.8°, P < 0.05), and the FFT angles worsened significantly at one year compared to the first measurements (11.1 ± 8.1° vs. 12.2 ± 8.8°, P = 0.004). Furthermore, using a hierarchical multiple regression model, the difference in SPV from the first visit to the first half year was considered a factor contributing to annual FFT change (P = 0.002).
CONCLUSIONS: This longitudinal study of a large number of cases suggested that changes in SPV may precede changes in FFT.
OBJECTIVES: The present study prospectively tested the effects of the subjective postural vertical on the exacerbation of the forward flexion of trunk (FFT) through long-term observation of Parkinson's disease patients.
METHODS: Evaluation of the posture included measuring FFT, the angle of lateral flexion of trunk, and the angle at the position that the patient subjectively perceived as the vertical position at a stationary upright position immediately after standing up at the time of initial observation, 6 months later, and 1 year later.
RESULTS: The SPV angles worsened significantly at 6 months and 1 year compared to the first measurements (9.3 ± 6.7° vs. 10.8 ± 8.2° and 10.6 ± 7.8°, P < 0.05), and the FFT angles worsened significantly at one year compared to the first measurements (11.1 ± 8.1° vs. 12.2 ± 8.8°, P = 0.004). Furthermore, using a hierarchical multiple regression model, the difference in SPV from the first visit to the first half year was considered a factor contributing to annual FFT change (P = 0.002).
CONCLUSIONS: This longitudinal study of a large number of cases suggested that changes in SPV may precede changes in FFT.