Using Haptic Feedback to Improve Grasp Force Control in Multiple Sclerosis Patients

Jiang, Li; Cutkosky, Mark R.; Ruutiainen, Juhani; Raisamo, Roope

doi:10.1109/tro.2009.2019789

Cited by 29 publications

(12 citation statements)

References 26 publications

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“…It is well established that patients with acute and chronic neurological impairment use excessive grip forces when compared to healthy individuals (Cole et al, 2003; Dun et al, 2007; Hermsdörfer et al, 2003; Iyengar et al, 2009a,b; Jiang et al, 2009; Lowe and Freivalds, 1999; Zhang et al, 2011). Excessive grip force in these individuals may represent an attempt to compensate for their sensorimotor dysfunction by prioritizing effectiveness, i.e., preventing the object from slipping (Cole et al, 2003; Dun et al, 2007; Hermsdörfer et al, 2003, 2008; Lowe and Frievalds, 1999), over efficiency, i.e., producing just sufficient force for holding the object against gravity.…”

Section: Discussionmentioning

confidence: 99%

Effects of carpal tunnel syndrome on adaptation of multi-digit forces to object texture

Afifi

Santello

Johnston

2012

Clinical Neurophysiology

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Objective The ability to adapt digit forces to object properties requires both anticipatory and feedback-driven control mechanisms which can be disrupted in individuals with a compromised sensorimotor system. Carpal Tunnel Syndrome (CTS) is a median nerve compression neuropathy affecting sensory and motor function in a subset of digits in the hand. Our objective was to examine how CTS patients coordinate anticipatory and feedback-driven control for multi-digit grip force adaptation. Methods We asked CTS patients and healthy controls to grasp, lift, and hold an object with different textures. Results CTS patients effectively adapted their digit forces to changes in object texture, but produced excessive grip forces. CTS patients also produced larger peak force rate profiles with fewer modulations of normal force prior to lift onset than did controls and continued to increase grip force throughout the lift whereas forces were set at lift onset for the controls. Conclusions These findings suggest that CTS patients use less online sensory feedback for fine-tuning their grip forces, relying more on anticipatory control than do healthy controls. Significance These characteristics in force adaptation in CTS patients indicate impaired sensorimotor control which leads to excessive grip forces with the potential to further exacerbate their median nerve compression.

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Section: Discussionmentioning

confidence: 99%

Effects of carpal tunnel syndrome on adaptation of multi-digit forces to object texture

Afifi

Santello

Johnston

2012

Clinical Neurophysiology

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“…For example, Multiple Sclerosis patients significantly over-grip objects [11], but when sufferers receive vibratory feedback of their grip force (displaced to their less-affected hand) these forces reduce [12]. In a similar way, prosthesis fingertip forces have been transferred to the stump [13] or even the toes of amputees [14] to create appropriate and useful sensations.…”

Section: Introductionmentioning

confidence: 99%

The role of feed-forward and feedback processes for closed-loop prosthesis control

Saunders

Vijayakumar

2011

J NeuroEngineering Rehabil

175

153

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BackgroundIt is widely believed that both feed-forward and feed-back mechanisms are required for successful object manipulation. Open-loop upper-limb prosthesis wearers receive no tactile feedback, which may be the cause of their limited dexterity and compromised grip force control. In this paper we ask whether observed prosthesis control impairments are due to lack of feedback or due to inadequate feed-forward control.MethodsHealthy subjects were fitted with a closed-loop robotic hand and instructed to grasp and lift objects of different weights as we recorded trajectories and force profiles. We conducted three experiments under different feed-forward and feed-back configurations to elucidate the role of tactile feedback (i) in ideal conditions, (ii) under sensory deprivation, and (iii) under feed-forward uncertainty.Results(i) We found that subjects formed economical grasps in ideal conditions. (ii) To our surprise, this ability was preserved even when visual and tactile feedback were removed. (iii) When we introduced uncertainty into the hand controller performance degraded significantly in the absence of either visual or tactile feedback. Greatest performance was achieved when both sources of feedback were present.ConclusionsWe have introduced a novel method to understand the cognitive processes underlying grasping and lifting. We have shown quantitatively that tactile feedback can significantly improve performance in the presence of feed-forward uncertainty. However, our results indicate that feed-forward and feed-back mechanisms serve complementary roles, suggesting that to improve on the state-of-the-art in prosthetic hands we must develop prostheses that empower users to correct for the inevitable uncertainty in their feed-forward control.

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“…The ability to exploit sensory substitution phenomena by applying vibrotactile or electrotactile stimuli on sensate regions of skin (e.g. unaffected limb or torso) has been demonstrated to improve grip force regulation in people with spinal cord injury [65] and Mutiple Sclerosis [66], although these are small studies and the longer term functional benefits have yet to be demonstrated. The application of tactile haptic stimuli to rehabilitate insensate limbs has been less well explored.…”

Section: Tactile Haptic Rehabilitationmentioning

confidence: 99%

A narrative review on haptic devices: relating the physiology and psychophysical properties of the hand to devices for rehabilitation in central nervous system disorders

Demain

Metcalf

Merrett

et al. 2012

Disability and Rehabilitation: Assistive Technology

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 The current lack of emphasis on somatosensory rehabilitation may contribute to poor hand recovery in patients with central nervous system pathology.  Haptic technologies have the potential to improve sensation and sensory motor integration in neurological conditions  An underlying theoretical rationale is provided for the design and clinical use of haptic technologies in neuro-rehabilitation of the hand. AbstractPurpose. This paper provides rehabilitation professionals and engineers with a theoretical and pragmatic rationale for the inclusion of haptic feedback in the rehabilitation of central nervous system disorders affecting the hand. Method. A narrative review of haptic devices used in sensorimotor hand rehabilitation was undertaken. Presented papers were selected to outline and clarify the underlying somatosensory mechanisms underpinning these technologies and provide exemplars of the evidence to date.Results. Haptic devices provide kinaesthetic and/or tactile stimulation. Kinaesthetic haptics are beginning to be incorporated in central nervous system rehabilitation, however, there has been limited development of tactile haptics. Clinical research in haptic rehabilitation of the hand is embryonic but initial findings indicate potential clinical benefit. Conclusions. Haptic rehabilitation offers the potential to advance sensorimotor hand rehabilitation but both scientific and pragmatic developments are needed to ensure that its potential is realised.

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Using Haptic Feedback to Improve Grasp Force Control in Multiple Sclerosis Patients

Cited by 29 publications

References 26 publications

Effects of carpal tunnel syndrome on adaptation of multi-digit forces to object texture

Effects of carpal tunnel syndrome on adaptation of multi-digit forces to object texture

The role of feed-forward and feedback processes for closed-loop prosthesis control

A narrative review on haptic devices: relating the physiology and psychophysical properties of the hand to devices for rehabilitation in central nervous system disorders

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