Functional implications of impaired control of submaximal hip flexion following stroke. Muscle Nerve 2014 Feb;49(2):225-32
Date
04/30/2013Pubmed ID
23625534Pubmed Central ID
PMC4511603DOI
10.1002/mus.23886Scopus ID
2-s2.0-84892539771 (requires institutional sign-in at Scopus site) 19 CitationsAbstract
INTRODUCTION: We quantified submaximal torque regulation during low to moderate intensity isometric hip flexion contractions in individuals with stroke and the associations with leg function.
METHODS: Ten participants with chronic stroke and 10 controls performed isometric hip flexion contractions at 5%, 10%, 15%, 20%, and 40% of maximal voluntary contraction (MVC) in paretic, nonparetic, and control legs.
RESULTS: Participants with stroke had larger torque fluctuations (coefficient of variation, CV), for both the paretic and nonparetic legs, than controls (P < 0.05) with the largest CV at 5% MVC in the paretic leg (P < 0.05). The paretic CV correlated with walking speed (r2 = 0.54) and Berg Balance Score (r2 = 0.40). At 5% MVC, there were larger torque fluctuations in the contralateral leg during paretic contractions compared with the control leg.
CONCLUSIONS: Impaired low-force regulation of paretic leg hip flexion can be functionally relevant and related to control versus strength deficits poststroke.
Author List
Hyngstrom AS, Kuhnen HR, Kirking KM, Hunter SKAuthor
Allison Hyngstrom PhD Associate Professor in the Physical Therapy department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
AgedBiomechanical Phenomena
Case-Control Studies
Female
Hip Joint
Humans
Isometric Contraction
Male
Middle Aged
Models, Biological
Muscle, Skeletal
Paresis
Range of Motion, Articular
Stroke
Torque
Walking