Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/10330
Title: Impaired discrimination of surface friction contributes to pinch grip deficit after stroke.
Authors: Blennerhassett, Jannette M;Matyas, Thomas A;Carey, Leeanne M
Affiliation: Physiotherapy Department, Austin Health-Royal Talbot Rehabilitation Centre, Kew, Vic, Australia. Jannette.Blennerhassett @austin.org.au
Issue Date: 9-Mar-2007
Citation: Neurorehabilitation and Neural Repair 2007; 21(3): 263-72
Abstract: Impaired sensation and force production could both contribute to handgrip limitation after stroke. Clinically, training is usually directed to motor impairment rather than sensory impairment despite the prevalence of sensory deficit and the importance of sensory input for grip control.The aim of this study was to investigate if sensory deficits contribute to pinch grip dysfunction beyond that attributable to motor deficits poststroke.The study enlisted 45 stroke participants and 45 healthy controls matched for age, gender, and hand dominance. Ability to differentiate surface friction (Friction Discrimination Test [FDT]), match object weight (Weight Matching Test [WMT]), produce grip force to track a visual target (Visually Guided Pinch Test [VGPT]), and perform a Pinch-Grip Lift-and-Hold Test (PGLHT) was quantified relative to normative performance, as defined by matched controls. The relationship between sensory ability (FDT, WMT) and altered PGLHT performance adjusted for motor ability (VGPT) after stroke was then examined using multivariate regression.Deficits in FDT, WMT, and VGPT ability were present in at least half of the stroke sample and were largely independent across the variables. Poorer friction discrimination was significantly associated with longer latencies of grip-lift (r = .34; P = .03) and grip force dysregulation (r= .34; P= .03) after the impact of VGPT was statistically removed from PGLHT ability. However, performance on WMT did not relate to either PGLHT deficit.The findings indicate that impaired friction discrimination ability contributes to altered timing and force adjustment during PGLHT poststroke.
Internal ID Number: 17351081
URI: http://ahro.austin.org.au/austinjspui/handle/1/10330
DOI: 10.1177/1545968306295560
URL: http://www.ncbi.nlm.nih.gov/pubmed/17351081
Type: Journal Article
Subjects: Adult
Aged
Aged, 80 and over
Female
Friction
Hand Strength.physiology
Humans
Male
Middle Aged
Movement Disorders.etiology.physiopathology.rehabilitation
Multivariate Analysis
Neurons, Afferent.physiology
Perceptual Disorders.etiology.physiopathology.rehabilitation
Psychomotor Performance
Regression Analysis
Stroke.complications.physiopathology.rehabilitation
Touch.physiology
Appears in Collections:Journal articles

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