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:: Volume 8, Number 2 (5-2014) ::
mrj 2014, 8(2): 55-63 Back to browse issues page
The effect of immediate use of two types of ankle foot orthosis on proneuslongus muscle onset latency in response to sudden perturbation in female athletes with functional ankle instability and healthy female athletes
Majaneh Sohrab, Javad Sarafzadeh, Mohammad Ali Sanjari 1, Hasan Saeidi, Saeedeh Seyedmohseni, Narges Daneshafrooz
1- , sanjarima@alum.sharif.edu
Abstract:   (4169 Views)

Background and Aim: Many studies investigated the effect of ankle-foot orthosis on reducing the incidence of sprain. In this study the influence of elastic and semirigid stirrup type orthosis on the onset latency of peroneus longus muscle activity as the most important support of ankle- foot region in response to sudden perturbation was assessed in healthy group and athletes with functional ankle instability.

 

Materials and Methods: Thirteen healthy female athletes and 10 female athletes with functional ankle instability (17 to 27 years old) were perturbed unexpectedly by a custom made ankle perturbation system in frontal plane under three conditions of without orthotics, using elastic orthosis, and using semirigid stirrup-type orthosis. Simultaneous recording of electrical activity of peronus longus muscle was performed with surface electromyography.

 

Results: The results showed the significant differences between muscular latency of injured and control groups without orthosis (P=0.018). The onset latency reduced using each type of the orthoses in injured group but it was not significant (P>0.05).

 

Conclusion: Although the latency time of peroneus longus muscle response delay didn’t show significant reduction using orthoses in injured group, it seems that using orthoses leads to proprioception improvement and sensiomotor control increasement by stimulation of cutaneous mechanoreceptors.

 

Key words: Functional ankle instability, Invertory perturbation, Electromyography, Orthosis

Keywords: Functional ankle instability, Invertory perturbation, Electromyography, Orthosis
Full-Text [PDF 479 kb]   (1078 Downloads)    
Type of Study: Research | Subject: Special
Received: 2014/05/17 | Accepted: 2014/05/17 | Published: 2014/05/17
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Sohrab M, Sarafzadeh J, Sanjari M A, Saeidi H, Seyedmohseni S, Daneshafrooz N. The effect of immediate use of two types of ankle foot orthosis on proneuslongus muscle onset latency in response to sudden perturbation in female athletes with functional ankle instability and healthy female athletes. mrj. 2014; 8 (2) :55-63
URL: http://mrj.tums.ac.ir/article-1-5119-en.html
Volume 8, Number 2 (5-2014) Back to browse issues page
فصلنامه توانبخشی نوین Journal of Modern Rehabilitation
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