In vivo kinematics of functional ankle instability patients during the stance phase of walking

Gait & Posture
Shengxuan CaoKan Wang

Abstract

Previous studies showed functional ankle instability (FAI) patients have morphological ligamentous abnormality, despite having no apparent joint laxity. Whether tibiotalar and subtalar joints hypermobility exists in FAI patients during stance phase of walking, remains controversial. Ten unilateral FAI patients, ten unilateral lateral ankle sprain (LAS) copers and ten healthy controls were included. A dual fluoroscopy imaging system was utilized to capture the fluoroscopic images of tibiotalar and subtalar joint during the stance phase of walking. Kinematic data from six degrees of freedom were calculated utilizing a solid modeling software. The range of motion and joint excursions about six degrees of freedom were compared among the three groups. The correlations between range of motion and Cumberland Ankle Instability Tool (CAIT) scores were assessed utilizing the Spearman's correlation coefficient (r). During the stance phase, the FAI patients and LAS copers showed larger tibiotalar anterior/posterior translation than the healthy controls (FAI patients, p = .013; LAS copers, p = .002). The FAI patients also showed significantly larger lateral/medial translation (p = .035) and inversion/eversion rotation (p = .003) of subtalar...Continue Reading

Citations

Apr 2, 2021·The Journal of Orthopaedic and Sports Physical Therapy·Robroy L MartinDominic Carreira

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