形重错觉条件下的接物试验中腰部肌肉的预期与补偿姿势调节（英文）
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摘要
目的在形重错觉条件下反复进行突发姿势干扰实验,比较腰部姿势肌肉预期姿势调节(anticipatory postural adjustments,APAs)和补偿姿势调节(compensatory postural adjustments,CPAs)的变化,探索错误的任务预期对姿势控制策略的影响。方法采用双手接沙袋试验范式。受试者可见沙袋有2种大小,但未知其重量相同。接沙袋任务中同步采集受试者腰部姿势肌肉的表面肌电信号,计算肌肉反应延时及APAs和CPAs阶段反应强度。结果实验最初,面对大沙袋时竖脊肌和多裂肌的激活时间更早、APAs强度更大;但反复接取后,不同沙袋水平间的差异不再显著。口头报告显示,最初受试者认为大沙袋更重,但反复进行任务后认为小沙袋更重。结论错误的任务预期条件下,APAs的组织从最初的"对体积反应"到后期的"对重量反应",表明中枢神经系统对APAs的控制具有良好的学习效应。
Objective To investigate the effects of erroneous task-related prediction on postural control strategies,the anticipatory and compensatory postural adjustments(APAs and CPAs)of the lumbar postural muscles were detected through the repeated sandbag-catching tests with the size-weight illusion.Methods Eighteen male subjects were asked to catch two sizes of falling sandbags with a tray held in their hands without knowing that the sandbags were of the same weight.The surface electromyograms(sEMGs)of the lumbar muscles were recorded synchronously,and the activated times and integrals of EMG activities(IEMGs)during the APA and CPA phases were calculated.Results At first,the lumbar muscles were activated earlier and performed stronger APAs when the sandbag was larger.However,after repeated catching,the lumbar muscle reactions rapidly showed no significant difference between the large and small sizes of sandbags,while the subjects' oral reports revealed the size-weight illusion.Conclusion Perceptual prediction based on visual information influences the APAs and CPAs of lumbar muscles in the novel sandbag-catching task.But when the task-related perceptual prediction is erroneous,CNS can rapidly adjust the strategies to orchestrate an optimal postural control based on the actual perturbation.
Objective To investigate the effects of erroneous task-related prediction on postural control strategies,the anticipatory and compensatory postural adjustments(APAs and CPAs)of the lumbar postural muscles were detected through the repeated sandbag-catching tests with the size-weight illusion.Methods Eighteen male subjects were asked to catch two sizes of falling sandbags with a tray held in their hands without knowing that the sandbags were of the same weight.The surface electromyograms(sEMGs)of the lumbar muscles were recorded synchronously,and the activated times and integrals of EMG activities(IEMGs)during the APA and CPA phases were calculated.Results At first,the lumbar muscles were activated earlier and performed stronger APAs when the sandbag was larger.However,after repeated catching,the lumbar muscle reactions rapidly showed no significant difference between the large and small sizes of sandbags,while the subjects' oral reports revealed the size-weight illusion.Conclusion Perceptual prediction based on visual information influences the APAs and CPAs of lumbar muscles in the novel sandbag-catching task.But when the task-related perceptual prediction is erroneous,CNS can rapidly adjust the strategies to orchestrate an optimal postural control based on the actual perturbation.
引文
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[2]Shumway-Cook A,Woollacott MH.Motor Control:Translating Research into Clinical Practice[M].Bi S,Yan TB,Wang NH,et al.Beijing:People's Medical Publishing House,2009:152-155.(in Chinese)
[3]Mcgill SM,Grenier S,Kavcic N,et al.Coordination of muscle activity to assure stability of the lumbar spine[J].Journal of Electromyography and Kinesiology,2003,13(4):353-359.
[4]Windhorst U.Muscle proprioceptive feedback and spinal networks[J].Brain Research Bulletin,2007,73(4-6):155-202.
[5]Lacquaniti F,Maioli C.Adaptation to suppression of visual information during catching[J].Journal of Neuroscience,1989,9(1):149-159.
[6]Lacquaniti F,Maioli C.The role of preparation in tuning anticipatory and reflex responses during catching[J].Journal of Neuroscience,1989,9(1):134-148.
[7]Shiratori T,Latash ML.Anticipatory postural adjustments during load catching by standing subjects[J].Clinical Neurophysiology,2001,112(7):1250-1265.
[8]Xie L,Wang J,Zhang Z,et al.Psychological predictive effects of sudden posture perturbation[J].Acta Psychologica Sinica,2014,46(7):951-959.(in Chinese)
[9]Paloski WH,Oman CM,Bloomberg JJ,et al.Risk of sensory-motor performance failures affecting vehicle control during space missions:A review of the evidence[J].Journal of Gravitational Physiology,2008,15(2):1-29
[10]Reschke MF,Good EF,Cl Ment GR.Neurovestibular symptoms in astronauts immediately after space shuttle and international space station missions[J].OTO Open,2017,1(4):1-8.
[11]Kasai T,Yahagi S,Shimura K.Effect of vibration-induced postural illusion on anticipatory postural adjustment of voluntary arm movement in standing humans[J].Gait&Posture,2002,15(1):94-100.
[12]Slijper H,Latash ML.The effects of muscle vibration on anticipatory postural adjustments[J].Brain Research,2004,1015(1-2):57-72.
[13]Mohapatra S,Krishnan V,Aruin AS.Postural control in response to an external perturbation:effect of altered proprioceptive information[J].Experimental Brain Research,2012,217(2):197-208.
[14]Murray DJ,Ellis RR,Bandomir CA,et al.Charpentier(1891)on the size-weight illusion[J].Perception&Psychophysics,1999,61(8):1681-1685.
[15]Flanagan JR,Beltzner MA.Independence of perceptual and sensorimotor predictions in the size-weight illusion[J].Nature Neuroscience,2000,3(7):737-741.
[16]Santos MJ,Kanekar N,Aruin AS.The role of anticipatory postural adjustments in compensatory control of posture:1.Electromyographic analysis[J].Journal of Electromyography and Kinesiology,2010,20(3):388-397.
[17]Maurer C,Mergner T,Peterka RJ.Multisensory control of human upright stance[J].Experimental Brain Research,2006,171(2):231-250.
[18]Pereira MP,Pelicioni PHS,Gobbi LTB.The role of proprioception in the sagittal setting of anticipatory postural adjustments during gait initiation[J].Human Movement,2015,16(4):206-213.
[19]Kabbaligere R,Lee BC,Layne CS.Balancing sensory inputs:Sensory reweighting of ankle proprioception and vision during a bipedal posture task[J].Gait&Posture,2017,52:244-250.
[20]Mouchnino L,Robert G,Ruget H,et al.Online control of anticipated postural adjustments in step initiation:evidence from behavioral and computational approaches[J].Gait&Posture,2012,35(4):616-620.
[21]Ruget H,Blouin J,Teasdale N,et al.Can prepared anticipatory postural adjustments be updated by proprioception?[J].Neuroscience,2008,155(3):640-648.
[22]Milner AD.How do the two visual streams interact with each other?[J].Experimental Brain Research,2017,235(5):1297-1308.
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