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Effect of inversion and ankle bracing on peroneus longus Hoffmann reflex
Author(s) -
Sefton J. M.,
HicksLittle C. A.,
Koceja D. M.,
Cordova M. L.
Publication year - 2007
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/j.1600-0838.2006.00593.x
Subject(s) - peroneus longus , brace , ankle , bracing , medicine , stretch reflex , physical medicine and rehabilitation , reflex , orthodontics , physical therapy , anatomy , electromyography , physics , thermodynamics
This study examined peroneus longus (PL) Hoffmann reflex (H‐reflex) during sudden inversion perturbation of the ankle/foot complex under an ankle brace and non‐brace condition. Ten healthy subjects volunteered. H‐reflexes were tested on the up‐sloping portion of the recruitment curve, utilizing a control trial M‐wave above motor threshold to maintain consistency between subjects and conditions. The PL H/maximum M‐wave (M max ) ratio was established using the PL H‐reflex and PL M max peak‐to‐peak measures. The mean ratio across five trials for each subject under each ankle brace (brace, no brace) and surface (flat, inversion) conditions was utilized for analysis. The 1 × 4 repeated measures ANOVA revealed a significant main effect for treatment condition ( P <0.0001). The PL H/M max ratio significantly increased during sudden inversion‐no ankle brace condition compared with the flat surface no‐ankle brace condition ( P =0.04). Application of an ankle brace had no effect on PL H/M max ratio during inversion ( P =0.78). During this study PL H/M max ratios increased during an inversion perturbation in healthy ankles. This is believed to occur due to heightened sensorimotor demand placed on the nervous system during this motion. Moreover, application of an ankle brace during inversion does not appear to affect PL H/M max ratio.