Metatarsophalangeal Hyperextension Movement Pattern Related to Diabetic Forefoot Deformity

Physical Therapy - Tập 96 Số 8 - Trang 1143-1151 - 2016
Victor Cheuy1, Mary K. Hastings2, Michael J. Mueller3
1V.A. Cheuy, PhD, Physical Therapy Program, University of Colorado, Mail Stop C244, 13121 East 17th Ave, Room 3116, Aurora, CO 80045 (USA).
2M.K. Hastings, PT, DPT, MSCI, ATC, Program in Physical Therapy, Washington University School of Medicine, St Louis, Missouri.
3M.J. Mueller, PT, PhD, FAPTA, Program in Physical Therapy, Washington University School of Medicine.

Tóm tắt

Abstract Background Metatarsophalangeal joint (MTPJ) hyperextension deformity is common in people with diabetic neuropathy and a known risk factor for ulceration and amputation. An MTPJ hyperextension movement pattern may contribute to the development of this acquired deformity. Objective The purpose of this study was to determine, in people with diabetes mellitus and peripheral neuropathy (DM+PN), the ankle and MTPJ ranges of motion that characterize an MTPJ hyperextension movement pattern and its relationship to MTPJ deformity severity. It was hypothesized that severity of MTPJ deformity would be related to limitations in maximum ankle dorsiflexion and increased MTPJ extension during active ankle dorsiflexion movement tasks. Design A cross-sectional study design was used that included 34 people with DM+PN (mean age=59 years, SD=9). Methods Computed tomography and 3-dimensional motion capture analysis were used to measure resting MTPJ angle and intersegmental foot motion during the tasks of ankle dorsiflexion and plantar flexion with the knee extended and flexed to 90 degrees, walking, and sit-to/from-stand. Results The MTPJ extension movement pattern during all tasks was directly correlated with severity of MTPJ deformity: maximum ankle dorsiflexion with knee extended (r=.35; 95% confidence interval [CI]=.02, .62), with knee flexed (r=.35; 95% CI=0.01, 0.61), during the swing phase of gait (r=.47; 95% CI=0.16, 0.70), during standing up (r=.48; 95% CI=0.17, 0.71), and during sitting down (r=.38; 95% CI=0.05, 0.64). All correlations were statistically significant. Limitations This study was cross-sectional, and causal relationships cannot be made. Conclusions A hyperextension MTPJ movement pattern associated with limited ankle dorsiflexion has been characterized in people with diabetic neuropathy. Increased MTPJ extension during movement and functional tasks was correlated with severity of resting MTPJ alignment. Repetition of this movement pattern could be an important factor in the etiology of MTPJ deformity and future risk of ulceration.

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Physical Therapy

Tập 96 Số 8

1143-1151

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