Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971869
W. Wright, M. Agah, K. Darvish, E. Keshner
Sensorimotor coordination relies on fine calibration of the interaction among visual, vestibular, and somatosensory input. Our goal was to investigate how the spatiotemporal properties of passive inertial motion and visual input affect head stabilization. Healthy young adults (n=12) wore a head-mounted display during A/P sinusoidal horizontal translations of the whole body. Visual conditions (VIS) displayed forward (EO), sideways (SW), or backward (BW) visual motion relative to the head, plus an eyes-closed conditions (EC) which were combined with 4 inertial conditions to comprise 16 conditions in total. In SW either near or far DEPTH of field with 180° phase shift was displayed. Subjects were secured in a seat with head free to move. Frequency and amplitude of sinusoidal input included overlapping max acceleration (amax) or max velocity (vmax). Amplitude and phase of angular velocity was collected with a 3-axis gyro. A main effect of inertial condition on amplitude for all axes of head motion (p<.0000) and a shift (p<.0000) from phase lead to lag of head pitch with increasing freq (121°, 127°, 83°, −32°) were found. A main effect of VIS on head pitch (p<0.01) was due to the absence of vision (EC). An interaction effect between inertial and VIS conditions on head yaw occurred with SW (p<0.05). In SW, a significant interaction of depth of field and inertia on amplitude (p<0.001) and phase (p<0.05) of head yaw occurred, especially during high vmax conditions. Thus, visual flow can organize lateral cervical responses despite being discordant with inertial input.
{"title":"Head stabilization shows multisensory dependence on spatiotemporal characteristics of visual and inertial passive stimulation","authors":"W. Wright, M. Agah, K. Darvish, E. Keshner","doi":"10.1109/ICVR.2011.5971869","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971869","url":null,"abstract":"Sensorimotor coordination relies on fine calibration of the interaction among visual, vestibular, and somatosensory input. Our goal was to investigate how the spatiotemporal properties of passive inertial motion and visual input affect head stabilization. Healthy young adults (n=12) wore a head-mounted display during A/P sinusoidal horizontal translations of the whole body. Visual conditions (VIS) displayed forward (EO), sideways (SW), or backward (BW) visual motion relative to the head, plus an eyes-closed conditions (EC) which were combined with 4 inertial conditions to comprise 16 conditions in total. In SW either near or far DEPTH of field with 180° phase shift was displayed. Subjects were secured in a seat with head free to move. Frequency and amplitude of sinusoidal input included overlapping max acceleration (amax) or max velocity (vmax). Amplitude and phase of angular velocity was collected with a 3-axis gyro. A main effect of inertial condition on amplitude for all axes of head motion (p<.0000) and a shift (p<.0000) from phase lead to lag of head pitch with increasing freq (121°, 127°, 83°, −32°) were found. A main effect of VIS on head pitch (p<0.01) was due to the absence of vision (EC). An interaction effect between inertial and VIS conditions on head yaw occurred with SW (p<0.05). In SW, a significant interaction of depth of field and inertia on amplitude (p<0.001) and phase (p<0.05) of head yaw occurred, especially during high vmax conditions. Thus, visual flow can organize lateral cervical responses despite being discordant with inertial input.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129894130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971827
Ulrich Gotz, K. Brutsch, René Bauer, Florian Faller, R. Spoerri, A. Meyer-Heim, R. Riener, A. Koenig
With regard to applied game design, the collaboration between game designers, engineers, neuropsychologists and medical doctors has shown that it is important to create interfaces in which the learning process is made enjoyable. Achieving this depends on understanding the limitations of the patients, the hard- and software to hand, and the complexity of therapy from the various disciplinary understandings. The balance between what is ‘fun’ and what are serious needs must not be lost, at the same time, a finely calibrated equilibrium is necessary for developing successful therapeutic tools. Virtual reality games as tools for extended therapy are likely of limited application where the immersive experience cannot be adequately achieved or assessed.
{"title":"A virtual reality system for robot-assisted gait training based on game design principles","authors":"Ulrich Gotz, K. Brutsch, René Bauer, Florian Faller, R. Spoerri, A. Meyer-Heim, R. Riener, A. Koenig","doi":"10.1109/ICVR.2011.5971827","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971827","url":null,"abstract":"With regard to applied game design, the collaboration between game designers, engineers, neuropsychologists and medical doctors has shown that it is important to create interfaces in which the learning process is made enjoyable. Achieving this depends on understanding the limitations of the patients, the hard- and software to hand, and the complexity of therapy from the various disciplinary understandings. The balance between what is ‘fun’ and what are serious needs must not be lost, at the same time, a finely calibrated equilibrium is necessary for developing successful therapeutic tools. Virtual reality games as tools for extended therapy are likely of limited application where the immersive experience cannot be adequately achieved or assessed.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114324165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971820
A. Darekar, Gayatri Aravind, A. Lamontagne, J. Fung
The ability to accurately judge distance and time to collision is an important perceptual determinant in shaping obstacle circumvention strategies for functional locomotion. In addition, deficits in planning and execution, as well as biomechanical constraints imposed by age or neurological insult may lead to avoidance failure in this population. We have designed a closed system in sitting displaying self motion through a virtual environment to evaluate perceptual and navigational strategies for obstacle circumvention. In a pilot study involving six healthy young subjects and one older participant, all subjects perceived collision with a moving obstacle to have occurred almost a meter before the actual collision would have taken place. The older participant consistently under-estimated the distance of collision to a larger extent as compared to the young subjects. In the navigation task using a joystick, the older individual initiated medio-lateral deviations later than the younger individuals. The clearance distance was also observed to be smaller for the older participant thus increasing the risk of collision. Deficits in depth perception as well as motor planning may contribute to increased errors. However, rehabilitation interventions that use VR can be utilized to improve perceptual and planning abilities, such that efficacious avoidance strategies can be facilitated. Moreover, further testing of locomotion in environments may help devise novel interventions for promoting ambulation.
{"title":"Perceptual and navigational strategies for obstacle circumvention in a virtual environment","authors":"A. Darekar, Gayatri Aravind, A. Lamontagne, J. Fung","doi":"10.1109/ICVR.2011.5971820","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971820","url":null,"abstract":"The ability to accurately judge distance and time to collision is an important perceptual determinant in shaping obstacle circumvention strategies for functional locomotion. In addition, deficits in planning and execution, as well as biomechanical constraints imposed by age or neurological insult may lead to avoidance failure in this population. We have designed a closed system in sitting displaying self motion through a virtual environment to evaluate perceptual and navigational strategies for obstacle circumvention. In a pilot study involving six healthy young subjects and one older participant, all subjects perceived collision with a moving obstacle to have occurred almost a meter before the actual collision would have taken place. The older participant consistently under-estimated the distance of collision to a larger extent as compared to the young subjects. In the navigation task using a joystick, the older individual initiated medio-lateral deviations later than the younger individuals. The clearance distance was also observed to be smaller for the older participant thus increasing the risk of collision. Deficits in depth perception as well as motor planning may contribute to increased errors. However, rehabilitation interventions that use VR can be utilized to improve perceptual and planning abilities, such that efficacious avoidance strategies can be facilitated. Moreover, further testing of locomotion in environments may help devise novel interventions for promoting ambulation.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124904663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971872
H. V. van Hedel, Karin Wick, A. Meyer-Heim, K. Eng
We investigated the effectives of a glove-based virtual reality system (YouGrabber) on arm and hand function in 17 children and juveniles with cerebral palsy (CP). The intervention group (n=10) received 12 sessions of training, while the control group (n=7) performed computer games. Analyzed were grip strength and lateral-grip strength, the box-and-block test (BBT) and the nine-hole-peg test (9HPT) of the more affected hand. The BBT tended to improve more in the intervention compared to the control group (P = 0.07). Effect sizes of most measures were considerably larger in the intervention group. Our preliminary data suggest that children and juveniles with CP might profit from a 3 week training with the YouGrabber system to improve hand and arm function.
{"title":"Improving dexterity in children with cerebral palsy","authors":"H. V. van Hedel, Karin Wick, A. Meyer-Heim, K. Eng","doi":"10.1109/ICVR.2011.5971872","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971872","url":null,"abstract":"We investigated the effectives of a glove-based virtual reality system (YouGrabber) on arm and hand function in 17 children and juveniles with cerebral palsy (CP). The intervention group (n=10) received 12 sessions of training, while the control group (n=7) performed computer games. Analyzed were grip strength and lateral-grip strength, the box-and-block test (BBT) and the nine-hole-peg test (9HPT) of the more affected hand. The BBT tended to improve more in the intervention compared to the control group (P = 0.07). Effect sizes of most measures were considerably larger in the intervention group. Our preliminary data suggest that children and juveniles with CP might profit from a 3 week training with the YouGrabber system to improve hand and arm function.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124929776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971862
E. Tunik, S. Saleh, Hamid F. Bagce, A. Merians, S. Adamovich
We studied if mirror-visual feedback, presented in virtual reality (VR), could bolster the activity of the lesioned motor cortex in chronic stroke patients. 5 stroke subjects performed a simple finger movement using the non-paretic hand. During fMRI scanning, an MRI-compatible VR-motion capture interface was used to record their hand movement and actuate in real-time virtual hand models, which were presented in 1st person perspective as virtual feedback. Virtual hands' motion was manipulated by either actuating the hand model corresponding to the moving (unaffected) hand (veridical feedback) or the opposite (mirrored) virtual hand. Two additional types of feedback, in which the virtual hands were replaced with moving non-anthropomorphic shapes, served as control conditions. Subjects maintained consistent movement kinematics across conditions. In each of the 5 stroke subjects, mirrored feedback led to significant activation of the ipsilesional sensorimotor cortex, despite the affected hand remaining motionless during the task. An additional control experiment and conjunction analysis confirmed that the part of the motor cortex that was activated by mirrored feedback overlapped with the area of motor cortex involved in movement production of the affected hand. Our data suggest that mirrored visual feedback may be a feasible modality that can be used to recruit select brain regions in stroke patients as a means of facilitating neural reorganization and recovery.
{"title":"Mirror feedback in virtual reality elicits ipsilesional motor cortex activation in chronic stroke patients","authors":"E. Tunik, S. Saleh, Hamid F. Bagce, A. Merians, S. Adamovich","doi":"10.1109/ICVR.2011.5971862","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971862","url":null,"abstract":"We studied if mirror-visual feedback, presented in virtual reality (VR), could bolster the activity of the lesioned motor cortex in chronic stroke patients. 5 stroke subjects performed a simple finger movement using the non-paretic hand. During fMRI scanning, an MRI-compatible VR-motion capture interface was used to record their hand movement and actuate in real-time virtual hand models, which were presented in 1st person perspective as virtual feedback. Virtual hands' motion was manipulated by either actuating the hand model corresponding to the moving (unaffected) hand (veridical feedback) or the opposite (mirrored) virtual hand. Two additional types of feedback, in which the virtual hands were replaced with moving non-anthropomorphic shapes, served as control conditions. Subjects maintained consistent movement kinematics across conditions. In each of the 5 stroke subjects, mirrored feedback led to significant activation of the ipsilesional sensorimotor cortex, despite the affected hand remaining motionless during the task. An additional control experiment and conjunction analysis confirmed that the part of the motor cortex that was activated by mirrored feedback overlapped with the area of motor cortex involved in movement production of the affected hand. Our data suggest that mirrored visual feedback may be a feasible modality that can be used to recruit select brain regions in stroke patients as a means of facilitating neural reorganization and recovery.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127915256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971833
H. Lo, Y. Hsueh, C. Yeh, Sin-Lin Chen
People with neurological damage may develop physical impairments such as hemiplegia, and interlimb coordination deficits are common among stroke patients. Leg-cycling exercise is an alternative and symmetrical bilateral leg movement. However, stroke patients are generally reluctant to attend leg-cycling trainings. Virtual reality (VR) is a new and promising computer-based technology to promote leg-cycling training among stroke patients. A new force-detect leg-cycling training system which combined with a virtual community environment has been developed by our research team. Two healthy subjects were recruited to attend the preliminary case study. The results showed that the two healthy users could successfully operate the VR leg-cycling training system and control the direction of the virtual car in the virtual environment. In the next stage, patients with interlimb coordination deficits should be recruited in the training courses so as to verify the rehabilitative effect of the VR leg-cycling system.
{"title":"Development of a virtual reality leg-cycling training system for stroke patients","authors":"H. Lo, Y. Hsueh, C. Yeh, Sin-Lin Chen","doi":"10.1109/ICVR.2011.5971833","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971833","url":null,"abstract":"People with neurological damage may develop physical impairments such as hemiplegia, and interlimb coordination deficits are common among stroke patients. Leg-cycling exercise is an alternative and symmetrical bilateral leg movement. However, stroke patients are generally reluctant to attend leg-cycling trainings. Virtual reality (VR) is a new and promising computer-based technology to promote leg-cycling training among stroke patients. A new force-detect leg-cycling training system which combined with a virtual community environment has been developed by our research team. Two healthy subjects were recruited to attend the preliminary case study. The results showed that the two healthy users could successfully operate the VR leg-cycling training system and control the direction of the virtual car in the virtual environment. In the next stage, patients with interlimb coordination deficits should be recruited in the training courses so as to verify the rehabilitative effect of the VR leg-cycling system.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128030918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971835
K. Jordan, M. Sampson, J. Hijmans, Marcus King, L. Hale
ImAble is an integrated upper limb (UL) exercise system comprising three devices (Able-B, Able-M and Able-X) targeting UL rehabilitation using computer games and virtual reality (VR). The system can be tailored to different levels of ability and strength, depending on the presentation of the stroke. Results from pilot testing and case studies indicate a therapeutic benefit for both movement outcome and patient motivation.
{"title":"ImAble system for upper limb stroke rehabilitation","authors":"K. Jordan, M. Sampson, J. Hijmans, Marcus King, L. Hale","doi":"10.1109/ICVR.2011.5971835","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971835","url":null,"abstract":"ImAble is an integrated upper limb (UL) exercise system comprising three devices (Able-B, Able-M and Able-X) targeting UL rehabilitation using computer games and virtual reality (VR). The system can be tailored to different levels of ability and strength, depending on the presentation of the stroke. Results from pilot testing and case studies indicate a therapeutic benefit for both movement outcome and patient motivation.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123967930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971812
J. Berard, J. Fung, A. Lamontagne
Persons with a chronic stroke often manifest mobility deficits that may in part be related to altered visuomotor control. Specifically, the ability to use optic flow, which reflects self-motion, may be compromised after a stroke. We evaluated the locomotor behavior of 6 subjects with chronic stroke as they walked overground while viewing a virtual room displayed in a head-mounted display. The subjects were asked to walk straight in the virtual environment (VE). At 1.5m of forward walking, the room was slowly rotated up to 40° towards the paretic or non-paretic side, or remained centered (0°). In order to maintain a straight trajectory or a small net heading error in the VE, subjects could rotate their head, with or without modifying their walking trajectory. The responses of subjects were varied in terms of strategies and accuracy, leading to a wide range of net heading errors, in the VE. While there was no precise biomarker of excellent performance, the two individuals with the poorest performance had a history of visuospatial neglect. walking, steering, vision, stroke, hemiparetic, gait, visual motion, neglect
{"title":"Optic flow in a virtual environment can impact on locomotor steering post stroke","authors":"J. Berard, J. Fung, A. Lamontagne","doi":"10.1109/ICVR.2011.5971812","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971812","url":null,"abstract":"Persons with a chronic stroke often manifest mobility deficits that may in part be related to altered visuomotor control. Specifically, the ability to use optic flow, which reflects self-motion, may be compromised after a stroke. We evaluated the locomotor behavior of 6 subjects with chronic stroke as they walked overground while viewing a virtual room displayed in a head-mounted display. The subjects were asked to walk straight in the virtual environment (VE). At 1.5m of forward walking, the room was slowly rotated up to 40° towards the paretic or non-paretic side, or remained centered (0°). In order to maintain a straight trajectory or a small net heading error in the VE, subjects could rotate their head, with or without modifying their walking trajectory. The responses of subjects were varied in terms of strategies and accuracy, leading to a wide range of net heading errors, in the VE. While there was no precise biomarker of excellent performance, the two individuals with the poorest performance had a history of visuospatial neglect. walking, steering, vision, stroke, hemiparetic, gait, visual motion, neglect","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126933757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971863
Turolla Andrea, Agostini Michela, Zucconi Carla, Kiper Pawel, V. Andrea, Tonin Paolo, M. Dam, Piron Lamberto, Ventura Laura, Dalmartello Michela
Many applications of virtual reality appeared in different fields of the rehabilitation medicine. Nevertheless poor evidences of their effectiveness still exist. The aim of this original paper was to present the results of a retrospective analysis of 10 years of a non-immersive VR system application, for the treatment of the motor upper limb impairment in stroke patients. We observed a significant improvement in the motor outcomes, compared to standard rehabilitation, nevertheless a translation of the same effect on harder outcome such as independence wasn't observed.
{"title":"10 years experience in the application of the Reinforced Feedback in Virtual Environment (RFVE) for neurorehabilitation: Preliminary results from a retrospective analysis in stroke patients","authors":"Turolla Andrea, Agostini Michela, Zucconi Carla, Kiper Pawel, V. Andrea, Tonin Paolo, M. Dam, Piron Lamberto, Ventura Laura, Dalmartello Michela","doi":"10.1109/ICVR.2011.5971863","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971863","url":null,"abstract":"Many applications of virtual reality appeared in different fields of the rehabilitation medicine. Nevertheless poor evidences of their effectiveness still exist. The aim of this original paper was to present the results of a retrospective analysis of 10 years of a non-immersive VR system application, for the treatment of the motor upper limb impairment in stroke patients. We observed a significant improvement in the motor outcomes, compared to standard rehabilitation, nevertheless a translation of the same effect on harder outcome such as independence wasn't observed.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121990062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-06-27DOI: 10.1109/ICVR.2011.5971815
Johannes Brand, O. Geisseler, L. Holper, M. Hepp-Reymond, M. Morari, D. Kiper, K. Eng
It is known that systematic visual distortions using virtual reality technologies, prisms or mirrors, may have therapeutic effects for patients suffering from stroke or body image identity disorders. However, there are few studies which directly investigate neural activity changes during visual feedback manipulation. In the present study we created an experimental setup for investigating the effects of systematic virtual reality-mediated visual feedback manipulation of finger movements on cortical activity. We performed tests with two healthy female subjects who performed a line-tracking task under four conditions manipulating visual feedback of their own hand. To investigate hemodynamic responses in motor areas during the line tracking task we used functional near-infrared spectroscopy (fNIRS). We predicted that viewing larger or smaller virtual movements of fingers, compared to the real movements, would affect activity in motor areas and thus the hemodynamic response. Our preliminary results showed changes in the hemodynamic responses between stimulation period and baseline. There were indications of possible differences between conditions, and also of adaptation effects within conditions. However these effects were not significant in our preliminary data and we therefore need to collect additional data to draw further conclusions.
{"title":"The effects of manipulation of visual feedback in virtual reality on cortical activity: A pilot study","authors":"Johannes Brand, O. Geisseler, L. Holper, M. Hepp-Reymond, M. Morari, D. Kiper, K. Eng","doi":"10.1109/ICVR.2011.5971815","DOIUrl":"https://doi.org/10.1109/ICVR.2011.5971815","url":null,"abstract":"It is known that systematic visual distortions using virtual reality technologies, prisms or mirrors, may have therapeutic effects for patients suffering from stroke or body image identity disorders. However, there are few studies which directly investigate neural activity changes during visual feedback manipulation. In the present study we created an experimental setup for investigating the effects of systematic virtual reality-mediated visual feedback manipulation of finger movements on cortical activity. We performed tests with two healthy female subjects who performed a line-tracking task under four conditions manipulating visual feedback of their own hand. To investigate hemodynamic responses in motor areas during the line tracking task we used functional near-infrared spectroscopy (fNIRS). We predicted that viewing larger or smaller virtual movements of fingers, compared to the real movements, would affect activity in motor areas and thus the hemodynamic response. Our preliminary results showed changes in the hemodynamic responses between stimulation period and baseline. There were indications of possible differences between conditions, and also of adaptation effects within conditions. However these effects were not significant in our preliminary data and we therefore need to collect additional data to draw further conclusions.","PeriodicalId":345535,"journal":{"name":"2011 International Conference on Virtual Rehabilitation","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129841570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：