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Restoration of Reduced Self-Efficacy Caused by Chronic Pain through Manipulated Sensory Discrepancy

Matti Itkonen, Riku Kawabata, Satsuki Yamauchi, Shotaro Okajima, Hitoshi Hirata, Shingo Shimoda

TL;DR

Chronic pain disrupts body schema and lowers self-efficacy even after healing. The authors propose a multimodal framework using augmented reality, robot-assisted haptics, and embodied self-avatars to induce sensory-discrepancy and recalibrate proprioception. Central to the approach are real-time skeletal/muscular avatars, self-avatar embodiment, and motor imagery mechanisms to enhance rehabilitation outcomes. If validated, this method could expand patients' unconscious motor limits and improve functional recovery by restoring confidence through perceptual realignment and immersive feedback.

Abstract

Human physical function is governed by self-efficacy, the belief in one's motor capacity. In chronic pain patients, this capacity may remain reduced long after the damage causing the pain has been cured. Chronic pain alters body schema, affecting how patients perceive the dimension and pose of their bodies. We exploit this deficit using robotic manipulation technology and augmented sensory stimuli through virtual reality technology. We propose a sensory stimuli manipulation method aimed at modifying body schema to restore lost self-efficacy.

Restoration of Reduced Self-Efficacy Caused by Chronic Pain through Manipulated Sensory Discrepancy

TL;DR

Chronic pain disrupts body schema and lowers self-efficacy even after healing. The authors propose a multimodal framework using augmented reality, robot-assisted haptics, and embodied self-avatars to induce sensory-discrepancy and recalibrate proprioception. Central to the approach are real-time skeletal/muscular avatars, self-avatar embodiment, and motor imagery mechanisms to enhance rehabilitation outcomes. If validated, this method could expand patients' unconscious motor limits and improve functional recovery by restoring confidence through perceptual realignment and immersive feedback.

Abstract

Human physical function is governed by self-efficacy, the belief in one's motor capacity. In chronic pain patients, this capacity may remain reduced long after the damage causing the pain has been cured. Chronic pain alters body schema, affecting how patients perceive the dimension and pose of their bodies. We exploit this deficit using robotic manipulation technology and augmented sensory stimuli through virtual reality technology. We propose a sensory stimuli manipulation method aimed at modifying body schema to restore lost self-efficacy.
Paper Structure (4 sections, 2 figures)

This paper contains 4 sections, 2 figures.

Table of Contents

  1. Introduction
  2. Method
  3. Proposal
  4. Discussion

Figures (2)

  • Figure 1: Skeletal and muscular avatars visualize real-time body responses for patients undergoing robotic rehabilitation. These visualizations aim not only to enhance the patient's awareness of anatomical and physiological dynamics that are otherwise invisible to them, but also to create subconscious feedback loops for improvement. The skeletal avatar is created using inertial measurement units (Xsens Technologies, Enschede, Netherlands), while the muscular avatar animates muscles using colors mapped to the magnitude of averaged surface electromyography data. This data is streamed via the Lab Streaming Layer (https://github.com/sccn/labstreaminglayer) and the visualizations are implemented using the Unity Game Engine (Unity Technologies, California, USA).
  • Figure 2: Modulation of limb perception in virtual reality involves the patient observing an embodied avatar of the affected arm. This avatar is animated based on the subject's actual motion, adjusted to an altered range of shoulder flexion.