Anticipatory postural adjustments mediate the changes in fear-related behaviors in individuals with chronic low back pain

Author:

Nishi Yuki12,Osumi Michihiro2,Morioka Shu2

Affiliation:

1. Institute of Biomedical Sciences (Health Sciences) , Nagasaki University , Nagasaki , Japan

2. Neurorehabilitation Research Center, Kio University , Nara , Japan

Abstract

Abstract Objectives The role(s) of anticipatory postural adjustments (APAs) in changes in subsequent motor and postural controls in response to movement perturbations are unclear in individuals with chronic low back pain (CLBP). This study aimed to clarify the relationships among kinesiophobia, APAs, lumbar kinematic output, and postural control associated with lumbar movement in individuals with CLBP. Methods CLBP participants (n=48) and healthy controls (HCs) without CLBP (n=22) performed a bend-forward task using their lumbar region on a force platform and returned upright. Each participant’s lumbar movements were recorded using an electrogoniometer. We calculated the APA duration, the duration of lumbar direction changes from forward to backward, and the center of pressure (COP) position after lumbar movement tasks completion. Results Compared with the HCs, the duration of direction changes in lumbar movement and the APA duration in CLBP participants were prolonged, and the COP position was shifted forward. The mediation analysis revealed that the duration of lumbar direction changes in the CLBP group was subjected to a significant indirect effect of APAs and a direct effect of kinesiophobia, and the COP position was subjected to a significant indirect effect of kinesiophobia through APAs. Conclusions APAs partially mediate the relationship between kinesiophobia and changes in lumbar motor control and mediate the relationship between kinesiophobia and postural control in response to movement perturbations. These findings expand our understanding of APAs in altered subsequent movement and postural controls due to kinesiophobia in individuals with CLBP.

Publisher

Walter de Gruyter GmbH

Subject

Anesthesiology and Pain Medicine,Neurology (clinical)

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