Impaired force steadiness is associated with changes in force frequency composition in subacute stroke

• Published in: Neuroscience Vol. 242; pp. 69 - 77
• Main Authors: Chow, J.W, Stokic, D.S
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 09-07-2013; Elsevier
• Subjects: Aged; Biological and medical sciences; Case-Control Studies; Female; force variability; Fundamental and applied biological sciences. Psychology; hemiparesis; Humans; isometric contraction; Isometric Contraction - physiology; Knee - physiopathology; knee extensors; Male; Medical sciences; Middle Aged; Neurology; Paresis - complications; Paresis - physiopathology; spectral analysis; Stroke - complications; Stroke - pathology; Stroke - physiopathology; Torque; Vascular diseases and vascular malformations of the nervous system; Vertebrates: nervous system and sense organs; force variability; multivariate analysis of variance; PPF; peak power frequency; spectral analysis; FDI; isometric contraction; SD; RPP; analysis of variance; ANOVA; FFT; hemiparesis; MF; MANOVA; relative peak power; median frequency; Fast Fourier Transform; CV; knee extensors; maximum voluntary contraction; MVC; first dorsal interosseous; coefficient of variation; standard deviation; Knee; Nervous system diseases; Stroke; Cardiovascular disease; Isometric muscular contraction; Spectral analysis; Cerebral disorder; Vascular disease; Central nervous system disease; Cerebrovascular disease
• ISSN: 0306-4522; 1873-7544
• DOI: 10.1016/j.neuroscience.2013.03.040

Highlights • Decreased median frequency and increased relative peak power early after stroke. • Changes in selected frequency parameters found in both paretic and non-paretic legs. • Power spectra inadequately modulated with increasing contraction level after stroke. • Force variability and power spectra formed a non-linear relation in the paretic leg. • Less broadband force output may account for impaired force steadiness after stroke.