Objective:To investigate the effects of mirror neuron theory-based visual feedback therapy(VFT)on restoration of upper limb function of stroke patients and motor-related cortical function using functional magnetic res...Objective:To investigate the effects of mirror neuron theory-based visual feedback therapy(VFT)on restoration of upper limb function of stroke patients and motor-related cortical function using functional magnetic resonance imaging(fMRI).Methods:Hemiplegic stroke patients were randomly divided into two groups:a VFT group and a control(CTL)group.Sixteen patients in the VFT group received conventional rehabilitation(CR)and VFT for 8 weeks,while 15 patients in the CTL group received only CR.The Barthel Index(BI)was used to assess the activities of daily living at baseline and the 8th week of the recovery training period.The Fugl-Meyer assessment(FMA)scale,somatosensory evoked potential(SEP),and fMRI were used to evaluate the recovery effect of the training therapies.The latencies and amplitudes of N9 and N20 were measured.Before recovery training,fMRI was performed for all patients in the VFT and CTL groups.In addition,17 patients(9 in the VFT group and 8 in the CTL group)underwent fMRI for follow-up 2 months after treatment.Qualitative data were analyzed using the x2 test.The independent sample t-test was used to compare normally distributed data among different groups,the paired sample t-test was used to compare data between groups,and the non-parametric test was used to comparing data without normal distribution among groups.Results:There were no significant differences between the VFT and CTL group in all indexes.However,after 8 weeks of recovery training,these indexes were all significantly improved(P<0.05).As compared with the CTL group,the FMA scores,BI,and N9/N20 latencies and amplitudes of SEP in the VFT group were significantly improved(P<0.05).Two months after recovery training,fMRI showed that the degree of activation of the bilateral central anterior gyrus.parietal lobe,and auxiliary motor areas was significantly higher in the VFT group than the CTL group(P<0.05).Conclusions:VFT based on mirror neuron theory is an effective approach to improve upper extremity motor function and daily activity performance of stroke patients.The therapeutic mechanism promotes motor relearning by activating the mirror neuron system and motor cortex.SEP amplitudes increased only for patients who participated in visual feedback.VFT promotes sensory-motor plasticity and behavioral changes in both the motor and sensory domains.展开更多
To measure the latency between human motion stimulation and stereo image display response in a visual feedback-based minimally invasive surgical(MIS) robotic system,a method was proposed by comparing the orientations ...To measure the latency between human motion stimulation and stereo image display response in a visual feedback-based minimally invasive surgical(MIS) robotic system,a method was proposed by comparing the orientations of input and output events through image-processing technology. This method used a black bar to keep pace with the measured joint rotating at a number of speeds. During tests,an external camera was placed in front of the apparatus with a proper visual field,so that it can simultaneously view orientations of both bars fixed on the corresponding joints. After quantitatively analyzing the accuracy of the proposed measurement method,the method was applied to a visual feedback-based master–slave robotic system with two-degrees-of-freedom. Experimental results show that the latency of the overall system was approximately 250 ms,and the opposite clearance of the measured joint was in the range of 1.7°–1.9°.展开更多
BACKGROUND Supernumerary phantom limb(SPL)caused by spinal cord injury(SCI)has previously been reported in several studies.However,the mechanisms and management of SPL in SCI patients are still not fully understood.He...BACKGROUND Supernumerary phantom limb(SPL)caused by spinal cord injury(SCI)has previously been reported in several studies.However,the mechanisms and management of SPL in SCI patients are still not fully understood.Herein,we report a rare case of SPL in a patient with incomplete SCI.CASE SUMMARY A 46-year-old man complained of four hands 7 d after SCI.He was diagnosed with SPL complicated with actual limb neuropathic pain.Following a period of treatment with neurotrophic agents and Chinese traditional and analgesic medications,SPL symptoms and actual limb pain did not improve.However,his symptoms gradually lessened after combined treatment with high-frequency repetitive transcranial magnetic stimulation(rTMS),a promising neuromodulation technique,over the M1 cortex and visual feedback.After 7 wk of this treatment,SPL disappeared completely and actual limb pain was significantly relieved.CONCLUSION Cerebral plasticity changes may be a mechanism underlying the occurrence of non-painful SPL in SCI patients,and high-frequency rTMS applied to the M1 cortex could be a promising treatment method for SPL.展开更多
This paper investigates the visual servoing robust stabilization of nonholonomic mobile robots. The calibration of visual parameters is not only complicated, but also needs great consumption of calculated time so that...This paper investigates the visual servoing robust stabilization of nonholonomic mobile robots. The calibration of visual parameters is not only complicated, but also needs great consumption of calculated time so that the accurate calibration is impossible in some situations for high requirement of real timing. Hence, it is interesting and important to consider the design of stabilizing controllers for nonholonomic kinematic systems with uncalibrated visual parameters. A novel uncertain model of these nonholonomic kinematic systems is proposed. Based on this model, a stabilizing controller is discussed by using dynamic feedback and two-step techniques. The proposed robust controller makes the mobile robot image pose and the orientation converge to the desired configuration despite the lack of depth information and the lack of precise visual parameters. The stability of the closed loop system is rigorously proved. The simulation is given to show the effectiveness of the presented controllers.展开更多
Aims: The aim of the study is to investigate if the new method of auditory and visual biofeedback as Upper Limb Exercise may improve praxis skills alone without any traditional physical therapy treatment or not and wi...Aims: The aim of the study is to investigate if the new method of auditory and visual biofeedback as Upper Limb Exercise may improve praxis skills alone without any traditional physical therapy treatment or not and within three successive months of treatment in children with hemiplegic cerebral palsy. Methods: A 6-year-old hemiplegic cerebral palsied child was treated with Upper-Limb Exerciser as one of augmented visual and auditory feedback devices. Sensory Integration and Praxis test was used to measure a child’s ability to integrate sensory input for perception, motor planning, and spatial actions in;Space Visualization, Figure-Ground Perception, Standing and Walking Balance, Design Copying, Postural Praxis, Bilateral Motor Coordination, Constructional Praxis, Postrotary Nystagmus, Motor Accuracy, Sequencing Praxis, Oral Praxis, Manual Form Perception, Kinesthesia, Finger Identification, Graphethesia, Localization of Tactile Stimuli, and Praxis on Verbal Command. Results: The results revealed improvement of the major standard score for each of the 17 subtests of Sensory Integration and Praxis Test when compared after three successive treatment. Conclusion: The using upper limb exerciser as one method of augmented visual and auditory feedback can be used as one of the physical and occupational therapy programs aiming to improve praxis skills in hemiplegic cerebral palsied children.展开更多
目的:探讨基于视觉反馈的姿势控制训练对帕金森病患者的平衡功能及日常生活活动能力的影响。方法:纳入2018年1月至2021年12月于我院就诊的帕金森病患者60例,按照随机数字表法随机分为试验组和对照组,每组各30例。对照组接受常规的康复训...目的:探讨基于视觉反馈的姿势控制训练对帕金森病患者的平衡功能及日常生活活动能力的影响。方法:纳入2018年1月至2021年12月于我院就诊的帕金森病患者60例,按照随机数字表法随机分为试验组和对照组,每组各30例。对照组接受常规的康复训练,试验组在对照组的基础上给予基于视觉反馈的动态平衡训练及核心肌群控制训练,共治疗8周。两组在治疗前、治疗8周后均进行Berg平衡量表(BBS)、起立-行走计时测试(timed“up and go”test,TUGT)及改良的Barthel指数(MBI)评定,并对两组患者的临床疗效及康复训练满意度进行分析比较。结果:治疗后,两组患者BBS[(49.00±1.97)vs.(44.77±1.78)]、TUGT[(10.17±2.31)vs.(13.67±2.26)]、MBI[(64.83±6.09)vs.(54.33±7.51)]评分均优于治疗前,具有显著性差异(P<0.05);与对照组比较,试验组BBS(49.00±1.97)、TUGT(10.17±2.31)、MBI(64.83±6.09)均优于对照组,差异有显著性(P<0.05);试验组患者康复训练效果满意度为93.33%,与对照组(70.00%)比较有显著性优势,差异有显著性(P<0.05)。结论:常规康复训练能够改善帕金森病患者的平衡功能及日常生活活动能力,在此基础上,增加视觉反馈的姿势控制训练效果更显著,具有一定的临床推广价值。展开更多
研究对体育教学中视觉反馈在动作学习中的应用进行了系统的文献回顾,对Web of Science(Web of Science Core Collection and Medline)、SCOPUS、EBSCO、ELSEVIER、PLOS ONE、ERIC、中国知网7个数据库中2010年~2020年的文献进行检索,在2...研究对体育教学中视觉反馈在动作学习中的应用进行了系统的文献回顾,对Web of Science(Web of Science Core Collection and Medline)、SCOPUS、EBSCO、ELSEVIER、PLOS ONE、ERIC、中国知网7个数据库中2010年~2020年的文献进行检索,在2568项初步检查的研究中,有15项符合选择和质量标准。目的是确定视觉反馈在大、中学体育教育中的动作学习方面是否有效,并调查由语言反馈支持的不同视觉反馈变量(专家建模和自我建模)是否比单独的语言反馈更有效。随后,对纳入研究的不同条件(如年龄、样本量、持续时间、观测变量、运动项目等)是否适合日常应用进行评估。基于视频的视觉反馈在体育教育中能有效地增强运动学习,而且比单纯的口头反馈更有效。动作视频反馈技术是全新、多样性、个性化的促进动作学习和表现的数字化教学、训练辅助手段,能够为体育教学提供积极的促进效益,有助于学习者在短时间内提高运动技能和自我评估能力,使其成为体育教学过程中的有利手段,以提升个人的学习经验。展开更多
基金This study was supported in part by grants from Zhejiang province medical and health technology achievement Funding project(2018ZH044)Zhejiang province medical and health science and technology project.(2020KY317)+1 种基金Zhejiang province natural science foundation(LQ19H170001)2019-2021 period key discipline construction plan funded project of traditional Chinese medicine in Jiaxing city(2019 XK-A07).
文摘Objective:To investigate the effects of mirror neuron theory-based visual feedback therapy(VFT)on restoration of upper limb function of stroke patients and motor-related cortical function using functional magnetic resonance imaging(fMRI).Methods:Hemiplegic stroke patients were randomly divided into two groups:a VFT group and a control(CTL)group.Sixteen patients in the VFT group received conventional rehabilitation(CR)and VFT for 8 weeks,while 15 patients in the CTL group received only CR.The Barthel Index(BI)was used to assess the activities of daily living at baseline and the 8th week of the recovery training period.The Fugl-Meyer assessment(FMA)scale,somatosensory evoked potential(SEP),and fMRI were used to evaluate the recovery effect of the training therapies.The latencies and amplitudes of N9 and N20 were measured.Before recovery training,fMRI was performed for all patients in the VFT and CTL groups.In addition,17 patients(9 in the VFT group and 8 in the CTL group)underwent fMRI for follow-up 2 months after treatment.Qualitative data were analyzed using the x2 test.The independent sample t-test was used to compare normally distributed data among different groups,the paired sample t-test was used to compare data between groups,and the non-parametric test was used to comparing data without normal distribution among groups.Results:There were no significant differences between the VFT and CTL group in all indexes.However,after 8 weeks of recovery training,these indexes were all significantly improved(P<0.05).As compared with the CTL group,the FMA scores,BI,and N9/N20 latencies and amplitudes of SEP in the VFT group were significantly improved(P<0.05).Two months after recovery training,fMRI showed that the degree of activation of the bilateral central anterior gyrus.parietal lobe,and auxiliary motor areas was significantly higher in the VFT group than the CTL group(P<0.05).Conclusions:VFT based on mirror neuron theory is an effective approach to improve upper extremity motor function and daily activity performance of stroke patients.The therapeutic mechanism promotes motor relearning by activating the mirror neuron system and motor cortex.SEP amplitudes increased only for patients who participated in visual feedback.VFT promotes sensory-motor plasticity and behavioral changes in both the motor and sensory domains.
基金supported by the International S&T Cooperation Program of China (No. 2014DFA70710) the National Natural Science Foundation of China (No. 51475323)
文摘To measure the latency between human motion stimulation and stereo image display response in a visual feedback-based minimally invasive surgical(MIS) robotic system,a method was proposed by comparing the orientations of input and output events through image-processing technology. This method used a black bar to keep pace with the measured joint rotating at a number of speeds. During tests,an external camera was placed in front of the apparatus with a proper visual field,so that it can simultaneously view orientations of both bars fixed on the corresponding joints. After quantitatively analyzing the accuracy of the proposed measurement method,the method was applied to a visual feedback-based master–slave robotic system with two-degrees-of-freedom. Experimental results show that the latency of the overall system was approximately 250 ms,and the opposite clearance of the measured joint was in the range of 1.7°–1.9°.
文摘BACKGROUND Supernumerary phantom limb(SPL)caused by spinal cord injury(SCI)has previously been reported in several studies.However,the mechanisms and management of SPL in SCI patients are still not fully understood.Herein,we report a rare case of SPL in a patient with incomplete SCI.CASE SUMMARY A 46-year-old man complained of four hands 7 d after SCI.He was diagnosed with SPL complicated with actual limb neuropathic pain.Following a period of treatment with neurotrophic agents and Chinese traditional and analgesic medications,SPL symptoms and actual limb pain did not improve.However,his symptoms gradually lessened after combined treatment with high-frequency repetitive transcranial magnetic stimulation(rTMS),a promising neuromodulation technique,over the M1 cortex and visual feedback.After 7 wk of this treatment,SPL disappeared completely and actual limb pain was significantly relieved.CONCLUSION Cerebral plasticity changes may be a mechanism underlying the occurrence of non-painful SPL in SCI patients,and high-frequency rTMS applied to the M1 cortex could be a promising treatment method for SPL.
基金This work was supported by the National Basic Research 973 Program of China under Grant No. 2012CB316302, the National Natural Science Foundation of China under Grant Nos. 61322209 and 61175007, the National Key Technology Research and Development Program of China under Grant No. 2012BAH07B01.Thank Steve Maybank for the revision.
文摘目标识别，由分类和察觉组成，为坚韧性有二个重要属性：1 ) 亲密：察觉窗户应该离目标地点尽可能靠近，并且 2 ) 适应：目标匹配应该对在一个目标班以内的目标变化适应。用独立考虑分类和察觉的传统的方法满足两个属性是困难的；因此最近的研究建议基于信心 contextualization 并且前景建模联合他们。然而，这些联合忽视特征显著和目标结构，和生物证据建议特征显著和目标结构能在从底层指导识别到是重要的高级。事实上，对象识别在机制发源什么并且在哪儿在人的视觉系统的小径。更重要地，这些小径有反馈到对方并且交换有用信息，它可以改进亲密和适应。由视觉反馈启发了，我们由设计在分类和察觉之间的一个计算视觉反馈模型(VFM ) 建议一个柔韧的目标识别框架。在 what 反馈，从分类的特征显著被利用为更好的亲密修正察觉窗户；当时在里面在的地方反馈，从察觉的目标部分被用来为更好的适应匹配目标结构。试验性的结果证明 what 并且在反馈是有效的改善的地方，为对象识别的亲密和适应，和令人鼓舞的改进在挑战性的 Pascal VOC 2007 数据集上被获得。
基金supported by the National Natural Science Foundation of China (No.60874002)the Key Program of Scientific Innovation of Shanghai Education Committee (No.09zz158)the Shanghai Key Discipline (No.S30501)
文摘This paper investigates the visual servoing robust stabilization of nonholonomic mobile robots. The calibration of visual parameters is not only complicated, but also needs great consumption of calculated time so that the accurate calibration is impossible in some situations for high requirement of real timing. Hence, it is interesting and important to consider the design of stabilizing controllers for nonholonomic kinematic systems with uncalibrated visual parameters. A novel uncertain model of these nonholonomic kinematic systems is proposed. Based on this model, a stabilizing controller is discussed by using dynamic feedback and two-step techniques. The proposed robust controller makes the mobile robot image pose and the orientation converge to the desired configuration despite the lack of depth information and the lack of precise visual parameters. The stability of the closed loop system is rigorously proved. The simulation is given to show the effectiveness of the presented controllers.
文摘Aims: The aim of the study is to investigate if the new method of auditory and visual biofeedback as Upper Limb Exercise may improve praxis skills alone without any traditional physical therapy treatment or not and within three successive months of treatment in children with hemiplegic cerebral palsy. Methods: A 6-year-old hemiplegic cerebral palsied child was treated with Upper-Limb Exerciser as one of augmented visual and auditory feedback devices. Sensory Integration and Praxis test was used to measure a child’s ability to integrate sensory input for perception, motor planning, and spatial actions in;Space Visualization, Figure-Ground Perception, Standing and Walking Balance, Design Copying, Postural Praxis, Bilateral Motor Coordination, Constructional Praxis, Postrotary Nystagmus, Motor Accuracy, Sequencing Praxis, Oral Praxis, Manual Form Perception, Kinesthesia, Finger Identification, Graphethesia, Localization of Tactile Stimuli, and Praxis on Verbal Command. Results: The results revealed improvement of the major standard score for each of the 17 subtests of Sensory Integration and Praxis Test when compared after three successive treatment. Conclusion: The using upper limb exerciser as one method of augmented visual and auditory feedback can be used as one of the physical and occupational therapy programs aiming to improve praxis skills in hemiplegic cerebral palsied children.
文摘目的:探讨基于视觉反馈的姿势控制训练对帕金森病患者的平衡功能及日常生活活动能力的影响。方法:纳入2018年1月至2021年12月于我院就诊的帕金森病患者60例,按照随机数字表法随机分为试验组和对照组,每组各30例。对照组接受常规的康复训练,试验组在对照组的基础上给予基于视觉反馈的动态平衡训练及核心肌群控制训练,共治疗8周。两组在治疗前、治疗8周后均进行Berg平衡量表(BBS)、起立-行走计时测试(timed“up and go”test,TUGT)及改良的Barthel指数(MBI)评定,并对两组患者的临床疗效及康复训练满意度进行分析比较。结果:治疗后,两组患者BBS[(49.00±1.97)vs.(44.77±1.78)]、TUGT[(10.17±2.31)vs.(13.67±2.26)]、MBI[(64.83±6.09)vs.(54.33±7.51)]评分均优于治疗前,具有显著性差异(P<0.05);与对照组比较,试验组BBS(49.00±1.97)、TUGT(10.17±2.31)、MBI(64.83±6.09)均优于对照组,差异有显著性(P<0.05);试验组患者康复训练效果满意度为93.33%,与对照组(70.00%)比较有显著性优势,差异有显著性(P<0.05)。结论:常规康复训练能够改善帕金森病患者的平衡功能及日常生活活动能力,在此基础上,增加视觉反馈的姿势控制训练效果更显著,具有一定的临床推广价值。
文摘研究对体育教学中视觉反馈在动作学习中的应用进行了系统的文献回顾,对Web of Science(Web of Science Core Collection and Medline)、SCOPUS、EBSCO、ELSEVIER、PLOS ONE、ERIC、中国知网7个数据库中2010年~2020年的文献进行检索,在2568项初步检查的研究中,有15项符合选择和质量标准。目的是确定视觉反馈在大、中学体育教育中的动作学习方面是否有效,并调查由语言反馈支持的不同视觉反馈变量(专家建模和自我建模)是否比单独的语言反馈更有效。随后,对纳入研究的不同条件(如年龄、样本量、持续时间、观测变量、运动项目等)是否适合日常应用进行评估。基于视频的视觉反馈在体育教育中能有效地增强运动学习,而且比单纯的口头反馈更有效。动作视频反馈技术是全新、多样性、个性化的促进动作学习和表现的数字化教学、训练辅助手段,能够为体育教学提供积极的促进效益,有助于学习者在短时间内提高运动技能和自我评估能力,使其成为体育教学过程中的有利手段,以提升个人的学习经验。
