Detection of Compensatory Mechanism during Gait in Individuals with Functional Ankle Instability Using Inversion Perturbation

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YOUSEFI MOHAMMAD; SADEGHI HIEDAR; ILBEIGI SAEED; RAHIMI ABBAS; Khaleghi Tazegy Mahdi

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Journal: SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE Year:2018 | Volume:6 | Issue:4 Page(s): 240-248

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Title

Detection of Compensatory Mechanism during Gait in Individuals with Functional Ankle Instability Using Inversion Perturbation

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Keywords

Compensatory mechanismQ1

FAIQ2

Inversion perturbationQ1

GaitQ1

Abstract

Background and Aim: Delayed neuromuscular responses is among the most important lesions in individuals with Functional Ankle Instability (FAI), which indicates using the Compensatory mechanisms. Since most of body movements occur in closed-kinetic chain, the distal lesions can affect the proximal sections leading to the use of compensatory strategies. The aim of the present study was to investigate the compensatory strategies during Gait in individuals with FAI using Inversion perturbation. Material and Method: Seven healthy individuals (age 23. 40± 1. 70 years; weight 72. 25 ± 6. 14 Kg; height 176. 32 ± 6. 41 cm) and seven individuals with FAI (age: 24. 31± 0. 81 years; weight: 71. 15 ± 7. 21 Kg; height: 175. 12 ± 4. 28 cm) volunteered in the present semi-experimental investigation. Electrical activation of the peroneus longus, tibialis anterior, gluteus medius, and erector spine muscles during Gait on the Inversion perturbation system was measured using the wireless EMG system. Response Time to Perturbation (RTP) in electrical signals of the muscles was extracted using MATLAB and analyzed running independent T-tests (p<0. 05). Results: FAI group, as compared with the healthy group, indicated a significant longer RTP in the peroneus longus and erector spine muscles (p<0. 05), whereas RTP in gluteus medius muscle was significantly less in FAI group (p<0. 05). Although RTP in tibialis anterior muscle was longer in FAI group, as compared with the healthy group, no significant difference was observed between the two groups. Conclusion: The results of the current study showed that RTP differ in FAI group compared with that in the healthy group. Early recruitment of gluteus medius muscle in FAI group is indicator of using the hip-based strategy to control posture. Since the FAI individuals have lesions in muscle surrounding the ankle, ankle-based strategy is not enough to response the perturbation,; therefore, the dominant strategy for controlling the posture is hip-based strategy. Alterations in RTP are reported due to variation in the central neuromuscular control, so it is suggested that practitioners focus on detecting the Compensatory mechanisms.

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APA: Copy

YOUSEFI, MOHAMMAD, SADEGHI, HIEDAR, ILBEIGI, SAEED, RAHIMI, ABBAS, & Khaleghi Tazegy, Mahdi. (2018). Detection of Compensatory Mechanism during Gait in Individuals with Functional Ankle Instability Using Inversion Perturbation. SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE, 6(4 ), 240-248. SID. https://sid.ir/paper/239525/en

Vancouver: Copy

YOUSEFI MOHAMMAD, SADEGHI HIEDAR, ILBEIGI SAEED, RAHIMI ABBAS, Khaleghi Tazegy Mahdi. Detection of Compensatory Mechanism during Gait in Individuals with Functional Ankle Instability Using Inversion Perturbation. SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE[Internet]. 2018;6(4 ):240-248. Available from: https://sid.ir/paper/239525/en

IEEE: Copy

MOHAMMAD YOUSEFI, HIEDAR SADEGHI, SAEED ILBEIGI, ABBAS RAHIMI, and Mahdi Khaleghi Tazegy, “Detection of Compensatory Mechanism during Gait in Individuals with Functional Ankle Instability Using Inversion Perturbation,” SCIENTIFIC JOURNAL OF REHABILITATION MEDICINE, vol. 6, no. 4 , pp. 240–248, 2018, [Online]. Available: https://sid.ir/paper/239525/en

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