Impact of diabetic neuropathy severity on foot clearance complexity and variability during walking

Autor(es)

Suda, Eneida Yuri ^[1] ; Matias, Alessandra Bento ^[1] ; Bus, Sicco A. ^[2] ; Sacco, Isabel C. N. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Med, Speech & Occupat Therapy Dept, Phys Therapy, Sao Paulo - Brazil

^[2] Univ Amsterdam, Rehabil, Amsterdam Movement Sci, Amsterdam UMC, Meibergdreef 9, Amsterdam - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: GAIT & POSTURE; v. 74, p. 194-199, OCT 2019.
• Citações Web of Science: 0

Resumo

Background: The control of foot trajectory during swing phase is important to achieve safe clearance with the ground. Complexity of a physiological control system arises from the interaction of structural units and regulatory feedback loops that operate to enable the organism to adapt to a non-static environment. Diabetic polyneuropathy (DPN) impairs peripheral feedback inputs and alters ankle control during gait, which might affect toe clearance (ToC) parameters and its complexity, predisposing DPN-subjects to tripping and falling. Research question: How do different DPN-severity degrees change ToC trajectory and minimum ToC, and its complexity during gait of diabetic subjects? Methods: 15 healthy controls and 69 diabetic subjects were assessed and classified into DPN-severity degrees by an expert fuzzy model: absent (n = 26), mild (n = 21) and severe (n = 22). Three-dimensional kinematics was measured during comfortable walking. ToC was the minimum vertical distance between the marker placed at the first metatarsal head and the ground during swing. Mean ToC, ToC standard deviation (SD) between trials, and sample entropy (SaEn) and standard deviation (SD) of ToC trajectory were calculated from the ToC temporal series. ANOVA and ANCOVA (with the walking speed as the covariate) and Bonferroni pairwise post-hoc tests (P < 0.05) were used to compare groups. Results: Mean ToC and ToC SD did not show differences between groups (ANCOVA F = 0.436; df = 3; P = 0.705; F = 1.719; df = 3; P = 0.170, respectively). ToC trajectory SD also did not show differences between groups (ANCOVA F = 3.98; df = 3; P = 0.755). Severe-DPN subjects showed higher ToC\_Traj\_SaEn than controls (ANCOVA F = 2.60; df = 3; P = 0.05). Significance: Severe-DPN subjects showed a more complex pattern of overall foot-ankle trajectory in swing phase in comparison to controls, although did not present lower minimum ToC values. The higher complexity of ToC might lead to an increase in the motor system output (more strategies, increase in variability), resulting in a more unstable system and selected motor strategies. (AU)

• Processo FAPESP: 17/15449-4 - Biomecânica e aspectos funcionais do sistema musculoesquelético de corredores: efeito crônico de exercícios terapêuticos e do envelhecimento
• Beneficiário: Eneida Yuri Suda
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/17077-4 - Efeitos de um programa de fortalecimento do pé na ocorrência de lesões e na biomecânica do complexo do tornozelo e pé em corredores fundistas: um ensaio clínico controlado e randomizado
• Beneficiário: Alessandra Bento Matias
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto