Quadratic Association Between Corticomotor and Spinal-Reflexive Excitability and Self-Reported Disability in Participants With Chronic Ankle Instability.
J Sport Rehabil
; 25(2): 137-45, 2016 May.
Article
em En
| MEDLINE
| ID: mdl-25759960
ABSTRACT
CONTEXT Spinal-reflexive and corticomotor excitability may have a critical role in altering muscle function needed to stabilize the ankle in people with chronic ankle instability (CAI). OBJECTIVE:
To determine the association between self-reported disability and both spinal-reflexive and corticomotor excitability in people with CAI.DESIGN:
Descriptive laboratory study.SETTING:
Research laboratory.PARTICIPANTS:
30 participants with CAI. MAIN OUTCOMEMEASURES:
Soleus spinal-reflexive excitability was measured with normalized Hoffmann reflexes (HM ratio), and corticomotor excitability was measured with transcranial magnetic stimulation and quantified by normalized motor-evoked-potential (MEP) amplitudes at 120% of active motor threshold (120%MEP). Self-reported disability was quantified with the activities-of-daily-living and sport subscales of the Foot and Ankle Ability Measure (FAAM-ADL and FAAM-S). Separate linear Pearson product-moment correlations and nonlinear quadratic correlations were used to determine associations between the neural-excitability and disability variables.RESULTS:
Thirty participants were included in the spinal-reflexive-excitability analysis, while only 19 were included in the corticomotor analysis. There was a significant, weak linear association between HM ratio and FAAM-ADL (R = .39, P = .03) and a nonsignificant, weak linear association between HM ratio and FAAM-S (R = .36, P = .06). There were significant, moderate quadratic associations between HM ratio and both FAAM-ADL (R = .48, P = .03) and FAAM-S (R = .50, P = .02). There was a significant, moderate linear association between 120%MEP and FAAM-ADL (R = -.48, P = .04) and a nonsignificant, moderate negative linear association between FAAM-S (R = -.42, P = .07). There was a significant, moderate quadratic association between 120%MEP and FAAM-ADL (R = .57, P = .046) and a significant, strong quadratic correlation between 120%MEP and FAAM-S (R = .71, P = .004).CONCLUSIONS:
There are significant quadratic associations between self-reported disability and both spinal-reflexive and corticomotor excitability of the soleus. CAI participants with low or high neural excitability present with lower function.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Avaliação da Deficiência
/
Autorrelato
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Excitabilidade Cortical
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Instabilidade Articular
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Articulação do Tornozelo
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
J Sport Rehabil
Assunto da revista:
MEDICINA ESPORTIVA
/
REABILITACAO
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Nova Caledônia