Скачать или смотреть ICPLP2021 - Workshop: Body illusions for phantom pain relief

Marta Matamala-Gomez¹, Tony Donegan², Justyna Swidrak²,³,⁴
¹ Center for Studies in Communication Sciences “Luigi Anolli” (CESCOM). Department of Human Sciences
for Education “Riccardo Massa”. University of Milano-Bicocca, Milan, Italy.
² August Pi & Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
³ Experimental Virtual Environments for Neuroscience and Technology (Event Lab), Faculty of Psychology,
University of Barcelona, Barcelona, Spain
⁴ Institute of Psychology, Polish Academy of Sciences (IPPAS), Warsaw, Poland

Corresponding author: Marta Matamala-Gomez

Conflict of interest: nothing to declare

Description
Body Illusions (BIs) refer to altered perceptual states where the perception of the self-body significantly deviates from the physical body’s configuration, for example in aspects like perceived size, shape, posture, location, or sense of ownership [1]. BIs can be triggered through simple experimental manipulations (e.g., through congruent visuo-tactile or visuo-motor sensory stimulation), supporting the overall view that self-body perception is built dynamically on the base of multisensory integration processes and of the prior knowledge and experience we have about our human body [1]. Through BIs, subjects can embody fake body parts or whole fake bodies, which are perceived as belonging to or substituting their physical body [2]. One of the most well-known example of BIs is the rubber hand illusion (RHI) study, in which synchronous visuotactile stimulation of both a rubber hand located within the visual field of the participant, and the participant’s real hand, located outside the visual field of the participant, confers an illusion of ownership over the rubber hand [3]. Since this study, many researchers have investigated how to manipulate body perception through the use of fake bodies such as mannequins [4], mirrors [5], virtual reality [6], and 360º video [7]. A number of subsequent studies have focused on chronic pain, with the focus being on the analgesic effects of cross-modal perception (e.g., pain and vision) (for reviews see [8]–[11]). Alterations in body representation have been reported in patients with chronic pain [12]. Some consequences of experiencing body representation alterations include changes in the perception of the size of the painful limb in patients with complex regional pain syndrome [13], or phantom limb sensations in amputees (the persistent feeling that the amputated limb is still there) [14]. In this regard, body ownership illusions have been proposed as an effective tool to modulate the distorted internal body representation of the painful limb as a consequence of a maladaptive cortical plasticity after the injury, such as the telescopic effect in amputees [15], or for modulating the preserved representation of the amputated limb in the area of the brain, which is considered another key factor involved in chronic phantom pain [16]. In detail, it has been shown that through changing the size [17], [18][19], color [20][21], the morphological characteristics of the painful body part [22], or through the movement simulation [5], it is possible to induce pain relief in healthy and clinical populations, and this could also be relevant for phantom pain relief.

Aim of the workshop: The main aim of the present workshop is to provide knowledge about the concept and different types of BIs and how these can be applied for phantom pain relief in amputees.
Topics

References (Shortened due to description length limitations)
[1] K. Kilteni,
[2] S. Arzy,
[3] M. Botvinick
[4] V. Petkova
[5] V. S. Ramachandran
[6] M. Slater,
[7] M. Matamala-Gomez
[8] E. Boesch
[9] M. Matamala-Gomez
[10] T. Donegan
[11] M. Matamala-Gomez
[12] G. L. Moseley
[13] J. S. Lewis
[14] M. J. Giummarra
[15] H. Flor
[16] T. R. Makin
[17] K. Themelis
[18] G. Moseley
[19] M. Matamala-Gomez
[20] M. Martini
[21] M. Matamala-Gomez
[22] T. Nishigami

00:00:00 Introduction
00:00:45 Marta Matamala-Gomez: Body illusions for phantom pain relief
00:04:00 Body illusions
00:07:43 The rubber hand illusion (RHI)
00:08:52 Body ownership illusions
00:10:36 The concept of body matrix
00:13:57 Body ownership illusions for phantom limb pain relief
00:17:27 Justyna Swidrak: Body illusions for phantom pain relief
00:18:01 RHI can be induced in upper limb amputees
00:21:21 RHI and the ownership of a prosthetic limb
00:23:35 Mirror therapy – Demonstration
00:26:00 Mirror therapy vs Imagery therapy
00:28:09 Mirror therapy impact
00:31:19 Conclusions
00:33:15 Tony Donegan: Body illusions for phantom pain relief
00:33:52 Potential advantages of VR/AR
00:35:00 Virtual body ownership
00:38:31 Limitations
00:39:47 RCT of augmented reality mirror therapy
00:42:18 Non-immersive VR
00:46:54 Future work
00:49:30 Questions