Journal of Movement Disorders

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Current Status of Pelvic Lateral Shift in Patients With Parkinson’s Disease and Its Relationship With Lateral Trunk Flexion: Kyohei Mikami, Makoto Shiraishi, Akika Yoshimoto, Tsutomu Kamo; J Mov Disord. 2025;18(3):253-256. Published online April 15, 2025; DOI: https://doi.org/10.14802/jmd.25017

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Abstract PDF Supplementary Material: Objective
A lack of standardized methods for evaluating postural abnormalities hinders treatment progress. The role of pelvic lateral shift (PLS) in patients with Parkinson’s disease (PwP) exhibiting lateral trunk flexion (LTF) remains unclear. We hypothesized that PLS is related to LTF and investigated its characteristics and relationship with the LTF angle.
Methods
PwP attending outpatient rehabilitation (March 2018–March 2023) were assessed via still images. The PLS direction, its relationship with the LTF angle, and the LTF angle on the PLS side were analyzed.
Results
Among 158 patients, PLS was contralateral in 80 (50.6%), ipsilateral in 43 (27.2%), and absent in 35 (22.2%). In the contralateral PLS, but not in the ipsilateral PLS, the PLS angle was correlated with the LTF angle (r=0.48, p<0.001). The LTF angle was greater in the contralateral shift (8.5°±9.6°) than in the ipsilateral shift (2.8°±4.2°, p<0.001).
Conclusion
Based on the positive relationship between the LTF angle and contralateral shift angle, evaluation criteria that include PLS are needed for PwP with LTF.

Original Article

Gait Instability and Compensatory Mechanisms in Parkinson’s Disease Patients With Camptocormia: An Exploratory Study: Hideyuki Urakami, Yasutaka Nikaido, Yuta Okuda, Yutaka Kikuchi, Ryuichi Saura, Yohei Okada; J Mov Disord. 2025;18(2):127-137. Published online December 27, 2024; DOI: https://doi.org/10.14802/jmd.24226

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1 Web of Science
2 Crossref

Objective
Camptocormia contributes to vertical gait instability and, at times, may also lead to forward instability in experimental settings in Parkinson’s disease (PD) patients. However, these aspects, along with compensatory mechanisms, remain largely unexplored. This study comprehensively investigated gait instability and compensatory strategies in PD patients with camptocormia (PD+CC).
Methods
Ten PD+CC patients, 30 without camptocormia (PD-CC), and 27 healthy controls (HCs) participated. Self-paced gait tasks were analyzed using three-dimensional motion capture systems to assess gait stability as well as spatiotemporal and kinematic parameters. Unique cases with pronounced forward gait stability or instability were first identified, followed by group comparisons. Correlation analysis was performed to examine associations between trunk flexion angles (lower/upper) and gait parameters. The significance level was set at 0.05.
Results
Excluding one unique case, the PD+CC group presented a significantly lower vertical center of mass (COM) position (p=0.019) increased mediolateral COM velocity (p=0.004) and step width (p=0.013), compared to the PD-CC group. Both PD groups presented greater anterior‒posterior margins of stability than did the HCs (p<0.001). Significant correlations were found between lower/upper trunk flexion angles and a lower vertical COM position (r=-0.690/-0.332), as well as increased mediolateral COM velocity (r=0.374/0.446) and step width (r=0.580/0.474).
Conclusion
Most PD+CC patients presented vertical gait instability, increased fall risk, and adopted compensatory strategies involving greater lateral COM shift and a wider base of support, with these trends intensifying as trunk flexion angles increased. These findings may guide targeted interventions for gait instability in PD+CC patients.

Citations

Citations to this article as recorded by

Immediate Effects of a Jewett Brace on Posture and Dynamic Balance in Parkinson’s Disease-Associated Camptocormia: A Case Report
Chisato Nakamoto, Kyota Bando, Yohei Mukai, Yuji Takahashi, Kazuhiko Seki, Takatoshi Hara
Cureus.2026;[Epub] CrossRef
How are we representing the trunk? A narrative review on marker sets for kinematics analysis of neurological conditions.
María B. Sánchez, Alberto Javier Fidalgo-Herrera, Bruno Mazuquin
Clinical Biomechanics.2026; 137: 106843. CrossRef

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