Supplemental vibrotactile feedback of real-time limb position enhances precision of goal-directed reaching

Risi, Nicoletta; Shah, Valay A; Mrotek, Leigh A.; Casadio, Maura; Scheidt, Robert A.

doi:10.1101/327049

Cited by 7 publications

(15 citation statements)

References 46 publications

(62 reference statements)

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“…Vibrotactile feedback (VTF) is an inexpensive and non-invasive way of conveying supplemental information to a user without taxing visual or auditory attention. Common forms of vibrotactile cues include continuous state feedback (Risi et al 2019; Krueger et al 2017; Ferris and Sarter 2011), continuous error feedback relative to some goal (Cuppone et al 2016; Wall et al 2001; Tzorakoleftherakis et al 2016), and indicators of undesirable conditions [i.e., alarms; (Ferris and Sarter 2011)]. In each of these cases, the vibrotactile cues should be designed so that the encoded information is clearly perceptible.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal influences on discrimination of vibrotactile stimuli on the arm

et al. 2019

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Body–machine interfaces (BMIs) provide a non-invasive way to control devices. Vibrotactile stimulation has been used by BMIs to provide performance feedback to the user, thereby reducing visual demands. To advance the goal of developing a compact, multivariate vibrotactile display for BMIs, we performed two psychophysical experiments to determine the acuity of vibrotactile perception across the arm. The first experiment assessed vibration intensity discrimination of sequentially presented stimuli within four dermatomes of the arm (C5, C7, C8, and T1) and on the ulnar head. The second experiment compared vibration intensity discrimination when pairs of vibrotactile stimuli were presented simultaneously vs. sequentially within and across dermatomes. The first experiment found a small but statistically significant difference between dermatomes C7 and T1, but discrimination thresholds at the other three locations did not differ. Thus, while all tested dermatomes of the arm and hand could serve as viable sites of vibrotactile stimulation for a practical BMI, ideal implementations should account for small differences in perceptual acuity across dermatomes. The second experiment found that sequential delivery of vibrotactile stimuli resulted in better intensity discrimination than simultaneous delivery, independent of whether the pairs were located within the same dermatome or across dermatomes. Taken together, our results suggest that the arm may be a viable site to transfer multivariate information via vibrotactile feedback for body–machine interfaces. However, user training may be needed to overcome the perceptual disadvantage of simultaneous vs. sequentially presented stimuli.

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Section: Introductionmentioning

confidence: 99%

Spatial and temporal influences on discrimination of vibrotactile stimuli on the arm

et al. 2019

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“…Risi et al also showed that over the course of two days of VTF-guided reach training, target capture accuracy further improved toward the limits of vibrotactile perception, even though that level of accuracy exceeded the level attainable using proprioceptive control alone [14]. Successful use of VTF requires the user to sense vibration, decode the information it contains, and produce a task-appropriate response [15, 16].…”

Section: Introductionmentioning

confidence: 99%

“…Successful use of VTF requires the user to sense vibration, decode the information it contains, and produce a task-appropriate response [15, 16]. Given that VTF-guided reaching in Risi et al took approximately 2.5 times longer to perform than movements without VTF [14], it is likely that the use of online VTF to plan and control movements imposes additional cognitive loads sufficient to degrade movement timing. Thus, using real-time VTF to assist in performing simultaneous tasks, such as reaching for a glass of water while reading or talking, may be difficult until the use of VTF becomes automatic.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Risi and colleagues have demonstrated that limb-state VTF can be used effectively to provide real-time feedback such that movement accuracy in neurologically intact individuals improves beyond limits imposed by intrinsic proprioceptive uncertainty [14]. Risi et al also showed that over the course of two days of VTF-guided reach training, target capture accuracy further improved toward the limits of vibrotactile perception, even though that level of accuracy exceeded the level attainable using proprioceptive control alone [14]. Successful use of VTF requires the user to sense vibration, decode the information it contains, and produce a task-appropriate response [15, 16].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Dual Tasking on Vibrotactile Feedback Guided Reaching – A Pilot Study

Shah

Risi

Ballardini

et al. 2018

Lecture Notes in Computer Science

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Vibrotactile feedback (VTF) has been proposed as a non-invasive way to augment impaired or lost kinesthetic feedback in certain patient populations, thereby enhancing the real-time control of purposeful limb movements and quality of life. We used a dual tasking scenario to investigate the effects of cognitive load and short-term VTF training on VTF-guided reaching. Participants grasped the handle of a planar manipulandum with one hand and received VTF of its motion via a vibrotactile display attached to the non-moving arm. We asked participants to simultaneously perform VTF-guided reaching and a choice reaction time task both before and after training with VTF-guided reaching. Participants readily used VTF to guide goal-directed hand movements in the absence of visual feedback in the dual-task setting, even prior to training. This capability came at the cost of increased movement completion time. Short-term training on VTF-guided reaching induced significant improvements in target capture errors. Pre- and post-training comparisons of dual-task performance found training-related improvements in VTF-guided reach accuracy were resistant to dual-task interference. We found no training-related improvements in movement completion time or button press performance. These results indicate that VTF can be used to complete goal-directed reaches in a dual task situation, and that a single short bout of training sufficed for participants to begin the transition between the cognitive and associative phases of learning for the integration of VTF into the planning and ongoing control of reaching movements.

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“…However, most research has focused on the recovery of impaired motor function [78,[97][98][99], and the somatosensory function received less attention [84]. Previous studies used vibrotactile information to augment healthy and impaired somatosensation either by communicating error or state information via vibration [100][101][102]. In addition, skin brush information was used to convey directional information as part of efforts to substitute proprioception [84].…”

Section: Haptics For Rehabilitationmentioning

confidence: 99%

The effect of tactile augmentation on manipulation and grip force control during force-field adaptation

Avraham

Nisky

2020

J NeuroEngineering Rehabil

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Background: When exposed to a novel dynamic perturbation, participants adapt by changing their movements' dynamics. This adaptation is achieved by constructing an internal representation of the perturbation, which allows for applying forces that compensate for the novel external conditions. To form an internal representation, the sensorimotor system gathers and integrates sensory inputs, including kinesthetic and tactile information about the external load. The relative contribution of the kinesthetic and tactile information in force-field adaptation is poorly understood. Methods: In this study, we set out to establish the effect of augmented tactile information on adaptation to forcefield. Two groups of participants received a velocity-dependent tangential skin deformation from a custom-built skin-stretch device together with a velocity-dependent force-field from a kinesthetic haptic device. One group experienced a skin deformation in the same direction of the force, and the other in the opposite direction. A third group received only the velocity-dependent force-field. Results: We found that adding a skin deformation did not affect the kinematics of the movement during adaptation. However, participants who received skin deformation in the opposite direction adapted their manipulation forces faster and to a greater extent than those who received skin deformation in the same direction of the force. In addition, we found that skin deformation in the same direction to the force-field caused an increase in the applied grip-force per amount of load force, both in response and in anticipation of the stretch, compared to the other two groups. Conclusions: Augmented tactile information affects the internal representations for the control of manipulation and grip forces, and these internal representations are likely updated via distinct mechanisms. We discuss the implications of these results for assistive and rehabilitation devices.

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Supplemental vibrotactile feedback of real-time limb position enhances precision of goal-directed reaching

Cited by 7 publications

References 46 publications

Spatial and temporal influences on discrimination of vibrotactile stimuli on the arm

Spatial and temporal influences on discrimination of vibrotactile stimuli on the arm

Effect of Dual Tasking on Vibrotactile Feedback Guided Reaching – A Pilot Study

The effect of tactile augmentation on manipulation and grip force control during force-field adaptation

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