Altered postural modulation of Hoffmann reflex in the soleus and fibularis longus associated with chronic ankle instability |
| |
| Authors: | Kyung-Min Kim Christopher D. Ingersoll Jay Hertel |
| |
| Affiliation: | 1. Department of Health and Human Performance, Texas State University, San Marcos, TX, United States;2. The Herbert H. and Grace A. Dow College of Health Professions, Central Michigan University, Mt. Pleasant, MI, United States;3. Department of Human Services, University of Virginia, Charlottesville, VA, United States;1. Department of Kinesiology, KU Leuven, Tervuursevest 101 – bus 1501, 3001 Heverlee, BelgiumPlease check and approve the edit of authors’ affiliations.;2. Research, Development and Education, Sint Maartenskliniek, Hengstdal 3, 6522 JV Nijmegen, The Netherlands;1. University of Virginia, Department of Human Services/Kinesiology, Charlottesville, VA, USA;2. Michigan health System, MedSport/USA Hockey NTDP, Ann Arbor, MI, USA;3. Texas State University, Department of Health and Human Performance, San Marcos, TX, USA;1. Physical Therapy Department, School of Science and Technology, University of São Paulo State, Presidente Prudente, Brazil;2. School of Arts, Sciences, and Humanities, University of São Paulo, São Paulo, Brazil;3. Bioengineering Department, School of Engineering, University of São Paulo, São Carlos, São Paulo, Brazil;4. Discipline of Physiotherapy, Faculty of Health Sciences, University of Sydney, Sydney, New South Wales, Australia;1. Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Evin, Koodakyar Ave., Tehran, Iran;2. Research, Health and Podiatry Unit, Department of Health Sciences, Faculty of Nursing and Podiatry, Universidade da Coruña, Spain;3. Nursing and Physical Therapy Department, Institute of Biomedicine (IBIOMED), Faculty of Health Sciences, Universidad de León, Ponferrada, León, Spain;1. Department of Physical Therapy, Center of Health Sciences and Sport, Santa Catarina State University, Rua Pascoal Simoni, 358, Florianopolis, SC 88080-350, Brazil;2. Department of Physical Therapy and Rehabilitation Sciences, School of Health Professions, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS 66160, USA;1. Department of Human Performance and Exercise Science, Youngstown State University, Youngstown, OH, United States;2. VCU RUN LAB, Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, United States;3. Department of Physical Therapy, Virginia Commonwealth University, Richmond, VA, United States |
| |
| Abstract: | Our purpose was to assess Hoffmann (H) reflex modulations of the soleus and fibularis longus in three body positions (prone, bipedal and unipedal stances) in subjects with and without chronic ankle instability (CAI). Sixteen subjects with unilateral CAI and 15 healthy controls participated. Maximum H-reflexes and motor (M) waves were recorded bilaterally from the soleus and fibularis longus while subjects lied prone and then stood in quiet bipedal and unipedal stances. Maximum H-reflexes were normalized to maximum M waves to obtain Hmax:Mmax ratios for the three positions. H-reflex modulations, for each muscle, were quantified as the percent change scores in Hmax:Mmax ratios between each pair of positions: prone to bipedal, bipedal to unipedal, and prone to unipedal. There were significant group by limb interactions found for all three modulations (P < 0.05) for the soleus. In the CAI group, soleus modulations in involved limbs were significantly lower than in uninvolved limbs and both limbs in the controls. For the fibularis longus, similar results were found for the bipedal to unipedal and prone to unipedal modulations. Constrained ability of the sensorimotor system to down regulate H-reflex in more demanding postures may represent a potential mechanism of postural control deficits associated with CAI. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
