title: Longer reaction time of the fibularis longus muscle and reduced postural control in basketball players with functional ankle instability: A pilot study.
abstract: BACKGROUND
  Motor control evaluation in subjects with functional ankle instability is questionable when both ankles of the same subject are compared (affected vs non-affected).
  
  
  OBJECTIVE
  To compare the postural control and reaction time of ankle muscles among: basketball players with FAI (instability group), basketball players without FAI (non-instability group) and healthy non-basketball-playing participants (control group).
  
  
  METHODS
  Case-control study.
  
  
  METHODS
  Laboratory.
  
  
  METHODS
  Instability (n = 10), non-instability (n = 10), and control groups (n = 11).
  
  
  METHODS
  Centre of pressure variables (area, velocity and sway) were measured with a force platform. Reaction time of ankle muscles was measured via electromyography.
  
  
  RESULTS
  A one-way ANOVA demonstrated that there were significant differences between the instability and non-instability groups in the fibularis longus (p < 0.001), fibularis brevis (p = 0.031) and tibialis anterior (p = 0.049) muscles. Repeated-measures ANOVA and post hoc analysis determined significant differences for the area between the instability and non-instability groups (p = 0.001).
  
  
  CONCLUSIONS
  Basketball players with FAI have reduced postural control and longer reaction time of the fibularis and tibialis anterior muscles.
authors: Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile; Human Motor Control Laboratory, Faculty of Health Sciences, University of Talca, Av. Lircay s/n, 3460000 Talca, Chile. Electronic address: gmendez@utalca.cl.
authors: Guillermo
authors: G
authors: Méndez-Rebolledo
authors: Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile; School of Kinesiology, Faculty of Health, Santo Tomas University, Av Carlos Schörr 255, 3460000 Talca, Chile. Electronic address: eguzmanm@santotomas.cl.
authors: Eduardo
authors: E
authors: Guzmán-Muñoz
authors: Human Motor Control Laboratory, Faculty of Health Sciences, University of Talca, Av. Lircay s/n, 3460000 Talca, Chile. Electronic address: vgatica@utalca.cl.
authors: Valeska
authors: V
authors: Gatica-Rojas
authors: Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Av. Pedro de Valdivia 1509, 7500000 Santiago, Chile. Electronic address: hzbinden@uft.cl.
authors: Hermann
authors: H
authors: Zbinden-Foncea
mesh_terms: D016512:Ankle Injuries / Q000150:complications / Q000503:physiopathology*; D000843:Ankle Joint / Q000503:physiopathology*; D001490:Basketball / Q000502:physiology*; D001696:Biomechanical Phenomena; D004576:Electromyography; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000503:physiopathology*; D007866:Leg / Q000503:physiopathology; D008297:Male; D018482:Muscle, Skeletal / Q000503:physiopathology*; D010865:Pilot Projects; D004856:Postural Balance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*; D012189:Retrospective Studies; D055815:Young Adult
keywords: Ankle sprain; Centre of pressure; Muscle latency; Sport