Movement planning and online control in multiple sclerosis: assessment using a Fitts law reciprocal aiming task

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Abstract

We sought to quantify subtle changes in motor control in multiple sclerosis (MS) using a Fitts law reciprocal aiming task presented on a computer touchscreen. Upper-limb motor control is impaired in MS. However, many commonly used motor assessments do not detect subtle changes in motor function or differentiate between aspects of movement such as planning and online control. Fitts law states that movement time varies as a function of task difficulty, with smaller targets and greater distances making the task more difficult. We gave a Fitts aiming task to 22 patients with MS and 22 matched controls. We manipulated movement difficulty by changing the targets size and distance apart. The patients spent a significantly longer time than the controls stationary in each target before starting the next movement, and had a lower peak velocity, suggesting deficits in movement planning. The patients also spent longer in the deceleration phase of each movement, indicating deficits in the online control of movement. The computerized Fitts task allows quick, easy, and sensitive measurement of subtle aspects of movement. This task should be useful in clinical and research settings for assessing MS motor symptoms, disease progression, and treatment efficacy
Original languageEnglish
Pages (from-to)139 - 147
Number of pages9
JournalCognitive and Behavioral Neurology
Volume27
Issue number3
DOIs
Publication statusPublished - 2014

Cite this

@article{a00990247e7a41e88c36e1e35d5e8d34,
title = "Movement planning and online control in multiple sclerosis: assessment using a Fitts law reciprocal aiming task",
abstract = "We sought to quantify subtle changes in motor control in multiple sclerosis (MS) using a Fitts law reciprocal aiming task presented on a computer touchscreen. Upper-limb motor control is impaired in MS. However, many commonly used motor assessments do not detect subtle changes in motor function or differentiate between aspects of movement such as planning and online control. Fitts law states that movement time varies as a function of task difficulty, with smaller targets and greater distances making the task more difficult. We gave a Fitts aiming task to 22 patients with MS and 22 matched controls. We manipulated movement difficulty by changing the targets size and distance apart. The patients spent a significantly longer time than the controls stationary in each target before starting the next movement, and had a lower peak velocity, suggesting deficits in movement planning. The patients also spent longer in the deceleration phase of each movement, indicating deficits in the online control of movement. The computerized Fitts task allows quick, easy, and sensitive measurement of subtle aspects of movement. This task should be useful in clinical and research settings for assessing MS motor symptoms, disease progression, and treatment efficacy",
author = "Anne-Marie Ternes and Joanne Fielding and Corben, {Louise Anne} and White, {Owen B} and Bradshaw, {John Lockyer} and Hocking, {Darren Robert} and Nellie Georgiou-Karistianis",
year = "2014",
doi = "10.1097/WNN.0000000000000036",
language = "English",
volume = "27",
pages = "139 -- 147",
journal = "Cognitive and Behavioral Neurology",
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publisher = "Lippincott Williams & Wilkins",
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TY - JOUR

T1 - Movement planning and online control in multiple sclerosis: assessment using a Fitts law reciprocal aiming task

AU - Ternes, Anne-Marie

AU - Fielding, Joanne

AU - Corben, Louise Anne

AU - White, Owen B

AU - Bradshaw, John Lockyer

AU - Hocking, Darren Robert

AU - Georgiou-Karistianis, Nellie

PY - 2014

Y1 - 2014

N2 - We sought to quantify subtle changes in motor control in multiple sclerosis (MS) using a Fitts law reciprocal aiming task presented on a computer touchscreen. Upper-limb motor control is impaired in MS. However, many commonly used motor assessments do not detect subtle changes in motor function or differentiate between aspects of movement such as planning and online control. Fitts law states that movement time varies as a function of task difficulty, with smaller targets and greater distances making the task more difficult. We gave a Fitts aiming task to 22 patients with MS and 22 matched controls. We manipulated movement difficulty by changing the targets size and distance apart. The patients spent a significantly longer time than the controls stationary in each target before starting the next movement, and had a lower peak velocity, suggesting deficits in movement planning. The patients also spent longer in the deceleration phase of each movement, indicating deficits in the online control of movement. The computerized Fitts task allows quick, easy, and sensitive measurement of subtle aspects of movement. This task should be useful in clinical and research settings for assessing MS motor symptoms, disease progression, and treatment efficacy

AB - We sought to quantify subtle changes in motor control in multiple sclerosis (MS) using a Fitts law reciprocal aiming task presented on a computer touchscreen. Upper-limb motor control is impaired in MS. However, many commonly used motor assessments do not detect subtle changes in motor function or differentiate between aspects of movement such as planning and online control. Fitts law states that movement time varies as a function of task difficulty, with smaller targets and greater distances making the task more difficult. We gave a Fitts aiming task to 22 patients with MS and 22 matched controls. We manipulated movement difficulty by changing the targets size and distance apart. The patients spent a significantly longer time than the controls stationary in each target before starting the next movement, and had a lower peak velocity, suggesting deficits in movement planning. The patients also spent longer in the deceleration phase of each movement, indicating deficits in the online control of movement. The computerized Fitts task allows quick, easy, and sensitive measurement of subtle aspects of movement. This task should be useful in clinical and research settings for assessing MS motor symptoms, disease progression, and treatment efficacy

UR - http://goo.gl/5Owvxw

U2 - 10.1097/WNN.0000000000000036

DO - 10.1097/WNN.0000000000000036

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VL - 27

SP - 139

EP - 147

JO - Cognitive and Behavioral Neurology

JF - Cognitive and Behavioral Neurology

SN - 1543-3633

IS - 3

ER -