The Experts below are selected from a list of 5499 Experts worldwide ranked by ideXlab platform
Roel Van Deventer - One of the best experts on this subject based on the ideXlab platform.
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development of a haptic device with tactile and Proprioceptive Feedback for spatial design tasks
International Symposium on Mixed and Augmented Reality, 2017Co-Authors: Tim Bakker, Jouke Verlinden, David A Abbink, Roel Van DeventerAbstract:We present a novel, low-cost haptic Feedback device for spatial design tasks that provides Proprioceptive and tactile Feedback. It uses the Manus VR datagloves and a custom VR CAD environment. Here, tactile Feedback is provided to the index finger through a vibrating motor, which helps users in identifying points on a grid. This grid allows for alignment during the creation and manipulation of geometric shapes. Models can be adjusted by pinching at a vertex of the shape with index finger and thumb, and moving this to a different point on the grid. Here, Proprioceptive Feedback is provided by a solenoid locking mechanism. The system was evaluated through preliminary user testing. Results indicate that the device leads to more natural and intuitive interactions for both the point grid and vertex adjustment, but that the ergonomics needs to be improved. Future challenges involve further integration of the physical device and datagloves and refined, multi-finger Feedback.
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ISMAR Adjunct - Development of a Haptic Device with Tactile and Proprioceptive Feedback for Spatial Design Tasks
2017 IEEE International Symposium on Mixed and Augmented Reality (ISMAR-Adjunct), 2017Co-Authors: Tim Bakker, Jouke Verlinden, David A Abbink, Roel Van DeventerAbstract:We present a novel, low-cost haptic Feedback device for spatial design tasks that provides Proprioceptive and tactile Feedback. It uses the Manus VR datagloves and a custom VR CAD environment. Here, tactile Feedback is provided to the index finger through a vibrating motor, which helps users in identifying points on a grid. This grid allows for alignment during the creation and manipulation of geometric shapes. Models can be adjusted by pinching at a vertex of the shape with index finger and thumb, and moving this to a different point on the grid. Here, Proprioceptive Feedback is provided by a solenoid locking mechanism. The system was evaluated through preliminary user testing. Results indicate that the device leads to more natural and intuitive interactions for both the point grid and vertex adjustment, but that the ergonomics needs to be improved. Future challenges involve further integration of the physical device and datagloves and refined, multi-finger Feedback.
Bruce M. Hood - One of the best experts on this subject based on the ideXlab platform.
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Believing what you feel: using Proprioceptive Feedback to reduce unilateral neglect.
Neuropsychology, 1997Co-Authors: Ian H. Robertson, Daniele Nico, Bruce M. HoodAbstract:Unilateral spatial neglect declines when participants reach to grip the center of long metal rods compared with when they point to the perceived center, suggesting that visuomotor control systems are less affected by neglect than other representational systems (I. H. Robertson, D. Nico, & B. Hood, 1995). In this study, 16 participants with unilateral left neglect actually picked up rods, and we predicted short-term improvements in neglect because of induced conflict between a phenomenally symmetrical visual world on the one hand and a Proprioceptively conveyed rightward-biased world on the other. With participants serving as their own controls, significant short-term improvements in neglect were found on 2 out of 4 neglect tasks after participants experienced Proprioceptive Feedback discrepant from the judgments they made on the basis of visual information alone.
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Believing what you feel: Using Proprioceptive Feedback to reduce unilateral neglect.
Neuropsychology, 1997Co-Authors: Ian H. Robertson, Daniele Nico, Bruce M. HoodAbstract:Unilateral spatial neglect declines when participants reach to grip the center of long metal rods compared with when they point to the perceived center, suggesting that visuomotor control systems are less affected by neglect than other representational systems (I. H. Robertson, D. Nice, & B. Hood, 1995). In this study, 16 participants with unilateral left neglect actually picked up rods, and we predicted short-term improvements in neglect because of induced conflict between a phenomenally symmetrical visual world on the one hand and a Proprioceptively conveyed rightward-biased world on the other. With participants serving as their own controls, significant short-term improvements in neglect were found on 2 out of 4 neglect tasks after participants experienced Proprioceptive Feedback discrepant from the judgments they made on the basis of visual information alone
Tim Bakker - One of the best experts on this subject based on the ideXlab platform.
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development of a haptic device with tactile and Proprioceptive Feedback for spatial design tasks
International Symposium on Mixed and Augmented Reality, 2017Co-Authors: Tim Bakker, Jouke Verlinden, David A Abbink, Roel Van DeventerAbstract:We present a novel, low-cost haptic Feedback device for spatial design tasks that provides Proprioceptive and tactile Feedback. It uses the Manus VR datagloves and a custom VR CAD environment. Here, tactile Feedback is provided to the index finger through a vibrating motor, which helps users in identifying points on a grid. This grid allows for alignment during the creation and manipulation of geometric shapes. Models can be adjusted by pinching at a vertex of the shape with index finger and thumb, and moving this to a different point on the grid. Here, Proprioceptive Feedback is provided by a solenoid locking mechanism. The system was evaluated through preliminary user testing. Results indicate that the device leads to more natural and intuitive interactions for both the point grid and vertex adjustment, but that the ergonomics needs to be improved. Future challenges involve further integration of the physical device and datagloves and refined, multi-finger Feedback.
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ISMAR Adjunct - Development of a Haptic Device with Tactile and Proprioceptive Feedback for Spatial Design Tasks
2017 IEEE International Symposium on Mixed and Augmented Reality (ISMAR-Adjunct), 2017Co-Authors: Tim Bakker, Jouke Verlinden, David A Abbink, Roel Van DeventerAbstract:We present a novel, low-cost haptic Feedback device for spatial design tasks that provides Proprioceptive and tactile Feedback. It uses the Manus VR datagloves and a custom VR CAD environment. Here, tactile Feedback is provided to the index finger through a vibrating motor, which helps users in identifying points on a grid. This grid allows for alignment during the creation and manipulation of geometric shapes. Models can be adjusted by pinching at a vertex of the shape with index finger and thumb, and moving this to a different point on the grid. Here, Proprioceptive Feedback is provided by a solenoid locking mechanism. The system was evaluated through preliminary user testing. Results indicate that the device leads to more natural and intuitive interactions for both the point grid and vertex adjustment, but that the ergonomics needs to be improved. Future challenges involve further integration of the physical device and datagloves and refined, multi-finger Feedback.
Mark R Cutkosky - One of the best experts on this subject based on the ideXlab platform.
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investigation of rotational skin stretch for Proprioceptive Feedback with application to myoelectric systems
IEEE Transactions on Neural Systems and Rehabilitation Engineering, 2010Co-Authors: Jaso Wheele, Karli Ark, Joa Savall, Mark R CutkoskyAbstract:We present a new wearable haptic device that provides a sense of position and motion by inducing rotational skin stretch on the user's skin. In the experiments described in this paper, the device was used to provide Proprioceptive Feedback from a virtual prosthetic arm controlled with myoelectric sensors on the bicep and tricep muscles in 15 able-bodied participants. Targeting errors in blind movements with the haptic device were compared to cases where no Feedback and contralateral proprioception were provided. Average errors were lower with the device than with no Feedback but larger than with contralateral Proprioceptive Feedback. Participants also had lower visual demand with the device than with no Feedback while tracking a 30° moving range. The results indicate that the rotational skin stretch may ultimately be effective for Proprioceptive Feedback in myoelectric prostheses, particularly when vision is otherwise occupied.
Susan H Brown - One of the best experts on this subject based on the ideXlab platform.
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Deficits in the ability to use Proprioceptive Feedback in children with hemiplegic cerebral palsy.
International journal of rehabilitation research. Internationale Zeitschrift fur Rehabilitationsforschung. Revue internationale de recherches de reada, 2009Co-Authors: Daniel J Goble, Edward A. Hurvitz, Susan H BrownAbstract:Compared with motor impairment in children with hemiplegic cerebral palsy (CP), less attention has been paid to sensory Feedback processing deficits. This includes, especially, Proprioceptive information regarding arm position. This study examined the ability of children with hemiplegic CP to use Proprioceptive Feedback during a goal-directed target-matching task. Eight children with hemiplegic CP and eight typically developing children performed Proprioceptively guided matching of elbow position with either arm. Between groups, it was found that matching errors were significantly greater for the affected arm of children with hemiplegic CP. With respect to the side of brain injury, deficits were only seen for children with right hemisphere damage. These results provide valuable information that may assist in the development of more effective sensorimotor rehabilitation and training paradigms.
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The influence of age and task demands on the ability to utilize Proprioceptive Feedback in right hand dominant individuals.
Progress in motor control VI, 2007Co-Authors: Diane E. Adamo, Susan H BrownAbstract:Proprioceptive Feedback arising from muscle, joint, and cutaneous receptors is critical for the control of coordinated limb movement, postural stability, and the learning and adaptation of goal-directed functional activity. Previously, we have shown that the ability to utilize somatosensory Feedback for upper limb position matching tasks declines with age (Adamo et al., in press). Based on our knowledge of cortical plasticity, it is known that motor training can improve upper limb function in neurological populations but to what extent task-specific activity preserves Proprioceptive function in the elderly is not known. The purpose of this study was to examine the influence of age and task demands on the ability to utilize Proprioceptive Feedback in older adults and determine if performing tasks specific to the upper limbs contributes to these differences. Twelve young (22-30 yrs) and 30 older (>70yrs) adults participated in the study with the elderly classified into two groups according to the frequency and duration of daily upper limb activities (upper limb specific: n=13, non-specific: n=17). Participants performed Proprioceptively-guided, 40 deg wrist extension movements in the absence of vision. The reference position was generated by passive displacement of the wrist and participants then matched the reference position with the same (ipsilateral remembered) or opposite (contralateral concurrent and contralateral remembered) wrist. Matching movements were made by the both the right dominant and left non-dominant limb. The ability to reproduce limb position using only Proprioceptive information was significantly reduced in elderly compared to young individuals (p
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Non-preferred arm advantages in the coordination of static and dynamic Proprioceptive Feedback
Progress in motor control VI, 2007Co-Authors: Daniel J Goble, Susan H BrownAbstract:Upper limb asymmetries in motor behavior are thought to be one of the most obvious examples of lateralized brain function. This phenomenon, more generally known as ?handedness?, has traditionally been approached from the standpoint of motor output, where preferred right arm performance advantages in right handed individuals are thought to reflect motor dominance of the contralateral left hemisphere. Studies from this laboratory, however, have suggested a potentially complementary role for the non-preferred arm/hemisphere in the utilization of sensory Feedback. In particular, the ability of subjects to perceive and replicate arm positions on the basis of static Proprioceptive Feedback appears to be enhanced for the non-preferred arm, especially in conditions with increased processing demands. The purpose of the present study was to examine limb asymmetries in conditions where both static and dynamic Feedback must be combined to perform accurate matching. Thirteen healthy, right-handed adult subjects performed a Proprioceptive matching task while blindfolded using an instrumented manipulandum designed for measuring horizontal elbow displacement. Using a torque motor system the preferred or non-preferred elbow was extended to a target position of 10, 20 or 30 deg. Subjects were then given 3 s to memorize the target arm position before returning the arm to the start position. Following a short delay, the same (ipsilateral remembered condition) or opposite (contralateral remembered condition) forearm was slowly rotated through a range of extension angles that included the previously memorized static target position. When the subject perceived the arm to be at the target location, subjects rapidly extended the fingers of the opposite hand. The non-preferred left arm was significantly more accurate in terms of absolute (p
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Task-dependent asymmetries in the utilization of Proprioceptive Feedback for goal-directed movement
Experimental Brain Research, 2007Co-Authors: Daniel J Goble, Susan H BrownAbstract:Whereas the majority of studies regarding upper limb asymmetries in motor performance have focused on preferred arm dominance for producing motor output, studies exploring the role of sensory Feedback have suggested that the preferred and non-preferred arms are specialized for different aspects of movement. A recent study by Goble et al. ( 2006 ) found evidence of a non-preferred left arm (and presumably right hemisphere) Proprioceptive dominance for a target matching task that required subjects to both memorize and transfer across hemispheres Proprioceptive target information. This paradigm contrasted previous studies of Proprioceptive matching asymmetry that explored only memory-based matching and produced equivocal results. The purpose of the present study, therefore, was to examine task-dependent asymmetries in Proprioceptive matching performance, including differences related to active versus passive presentation of the matching target. It was found that the non-preferred left arm of right handers matched target elbow angles more accurately than the preferred arm, but only in the matching condition that required both memory and interhemispheric transfer. Task-dependent asymmetries were not affected by the mode of target presentation and assessment of matching kinematics revealed differences in strategy for both the speed and smoothness of targeted movements. Taken together, these results suggest that the non-preferred arm/hemisphere system is specialized for the processing of movement-related Proprioceptive Feedback.
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Upper limb asymmetries in the utilization of Proprioceptive Feedback.
Experimental brain research, 2005Co-Authors: Daniel J Goble, Colleen A Lewis, Susan H BrownAbstract:Despite the importance of proprioception during upper limb movement, the extent to which arm/hemisphere asymmetries exist in the utilization of Proprioceptive Feedback remains unclear. In the present study, movement accuracy and arm dynamics were examined in 20 right-handed adults during a Proprioceptive matching task that required subjects to actively match remembered target positions of the elbow with the contralateral arm. As hypothesized, the results indicated an accuracy advantage in favor of the non-preferred left arm reflected by smaller absolute matching errors when compared to the preferred right arm. This advantage was most pronounced for larger amplitude movements and was not associated with any limb-specific difference in movement strategy as indicated by the dynamics of the matching movement. These results extend current theories of handedness by demonstrating that, in right-handed individuals, the non-preferred arm/hemisphere system is more adept at utilizing position-related Proprioceptive information than the preferred arm/hemisphere system.
