NDLI: Neuromuscular performance of paretic versus non-paretic plantar flexors after stroke

Content Provider	Springer Nature Link
Author	Fimland, Marius Steiro Moen, Per Marius R. Hill, Tessa Gjellesvik, Tor Ivar Tørhaug, Tom Helgerud, Jan Hoff, Jan
Copyright Year	2011
Abstract	The objective of this study was to compare the neuromuscular function of the paretic and non-paretic plantar flexors (i.e. soleus, gastrocnemius medialis, lateralis) in chronic stroke patients. It was hypothesized that the contractile rate of force development (RFD) and neural activation, assessed by electromyogram (EMG) and V-waves normalized to the M-wave, and voluntary activation (twitch interpolation) would be reduced during plantar flexor maximum voluntary isometric contraction and that the evoked muscle twitch properties would be reduced in the paretic limb. Ten chronic stroke survivors completed the study. The main findings were that the paretic side showed deteriorated function compared to the non-paretic leg in terms of (1) RFD in all analyzed time windows from force onset to 250 ms, although relative RFD (i.e. normalized to maximum voluntary force) was similar; (2) fast neural activation (for most analyzed time windows), assessed by EMG activity in time windows from EMG onset to 250 ms; (3) V-wave responses (except for gastrocnemius medialis); (4) voluntary activation; (5) the evoked peak twitch force, although there was no evidence of intrinsic muscle slowing; (6) EMG activity obtained at maximal voluntary force. In conclusion, this study demonstrates considerable neuromuscular asymmetry of the plantar flexors in chronic stroke survivors. Effective rehabilitation regimes should be investigated.
Starting Page	3041
Ending Page	3049
Page Count	9
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	111
Issue Number	12
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-04-01
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	H-reflex Neural drive Brain infarction Cerebrovascular accident Rehabilitation Sports Medicine Occupational Medicine/Industrial Medicine Human Physiology
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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