Document Detail

Deficits in peroneal latency and electromechanical delay in patients with functional ankle instability.
MedLine Citation:
PMID:  19569189     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to compare alterations in peroneal latency and electromechanical delay (EMD) following an inversion perturbation during walking in patients with functional ankle instability (FAI) and with a matched control group. Peroneal latency and EMD were measured from 21 patients with unilateral FAI and 21 controls. Latencies were collected during a random inversion perturbation while walking. EMD measures were collected during stance using a percutaneous stimulus. Two-way ANOVAs were used to detect differences between leg (affected, unaffected) and group (FAI, Control). Functionally unstable ankles displayed delayed peroneus longus (PL) latencies and EMD when compared to the unaffected leg and a matched control group. Peroneal latency and EMD deficits could contribute to recurrence of ankle injury in FAI subjects. How these deficits are associated with the chronic symptoms associated with FAI remains unclear, but gamma activation and subsequent muscle spindle sensitivity likely play a role.
J Ty Hopkins; Tyler N Brown; Logan Christensen; Riann M Palmieri-Smith
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of orthopaedic research : official publication of the Orthopaedic Research Society     Volume:  27     ISSN:  1554-527X     ISO Abbreviation:  J. Orthop. Res.     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-12-28     Completed Date:  2010-09-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8404726     Medline TA:  J Orthop Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1541-6     Citation Subset:  IM    
Human Performance Research Center, Department of Exercise Sciences, Brigham Young University, Provo, Utah 84602-2205, USA.
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MeSH Terms
Ankle Joint / innervation,  physiology*
Electric Stimulation
Electromyography / methods
Gait Disorders, Neurologic / etiology,  physiopathology*
Joint Instability / complications,  physiopathology*
Peroneal Nerve / physiopathology*
Reaction Time / physiology*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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