Removing visual feedback for a single limb alters between-limb force tremor relationships during isometric bilateral contractions

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• 作者：Leanne C. Kenway ; Leanne M. Bisset ; Justin J. Kavanagh
• 关键词：Crossed ; effects ; Force tremor ; Visual feedback ; Internal model ; Feedforward
• 刊名：Experimental Brain Research
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：233
• 期：1
• 页码：115-124
• 全文大小：444 KB
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• 作者单位：Leanne C. Kenway (1)
  Leanne M. Bisset (1)
  Justin J. Kavanagh (1)
  
  1. Centre for Musculoskeletal Research, School of Allied Health Sciences, Griffith University, Gold Coast Campus, Gold Coast, QLD, 4222, Australia
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Neurosciences
  Neurology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1106

文摘

This study examined how force tremor and muscle activity are altered between limbs when a visual target is removed for one limb during bilateral index finger abduction. Isometric index finger abduction force was examined in healthy adults (23?±?4?years) when both index fingers abducted simultaneously. Abduction forces ranged from 5 to 20?% maximum voluntary contraction, and these target forces were displayed on a PC monitor in front of the subject. Force tremor and first dorsal interosseous (FDI) activity were first collected while subjects viewed visual targets for both index fingers and then when the visual target was removed for the non-dominant index finger. Subjects successfully matched the force amplitudes generated for both limbs regardless of visual condition. When the visual target was removed for one limb, force tremor increased in this limb (p?p?