Analgesic effects of multisensory illusions in osteoarthritis

Preston, Catherine; Newport, Roger

doi:10.1093/rheumatology/ker104

Cited by 67 publications

(113 citation statements)

References 5 publications

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“…Our findings therefore suggest that such an effect can be modulated by manipulating the visual appearance of the hand through multisensory illusions. These current results therefore extend previous studies that have reported discrepancies in pain perception following manipulated representations of the body (Ramachandran, Brang and McGeoch, 2009;Preston & Newport, 2011) independent of the influence of pure response bias (Romano & Maravita, 2014;Mancini et al, 2011).…”

Section: Discussionsupporting

confidence: 91%

“…Manipulating the perceived size of painful body parts through visuo-proprioceptive illusions has been also found to have strong analgesic effects in patients with osteoarthritis (Preston & Newport, 2011). Collectively these findings suggest that both touch and pain can be modified by manipulated representations of perceived body size.…”

mentioning

confidence: 87%

“…In the current study participants were presented with three visuo-proprioceptive illusions on their index finger (see Figure 1); 'stretched finger', 'shrunken finger' and 'detached finger'. During the stretched finger condition, the experimenter grasped and pulled participants' index finger with slight pressure while the image of their finger (seen through the device) was simultaneously seen to grow longer (Preston & Newport, 2011). In the shrunken finger condition participants' index finger was gently 'pushed' while they simultaneously watched their finger shrink (Preston & Newport, 2011).…”

Section: Mirage Systemmentioning

confidence: 99%

“…During the stretched finger condition, the experimenter grasped and pulled participants' index finger with slight pressure while the image of their finger (seen through the device) was simultaneously seen to grow longer (Preston & Newport, 2011). In the shrunken finger condition participants' index finger was gently 'pushed' while they simultaneously watched their finger shrink (Preston & Newport, 2011). During the detached finger condition the index finger was pulled until the tip became elongated and then 'detached' from the rest of the finger , and as a visual convincer, a pen was passed through the detached part of the finger and the stump.…”

Section: Mirage Systemmentioning

confidence: 99%

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Multisensory distortions of the hand have differential effects on tactile perception

2015

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Research has suggested that altering the perceived\ud shape and size of the body image significantly\ud affects perception of somatic events. The current study\ud investigated how multisensory illusions applied to the body\ud altered tactile perception using the somatic signal detection\ud task. Thirty-one healthy volunteers were asked to report the\ud presence or absence of near-threshold tactile stimuli delivered\ud to the index finger under three multisensory illusion\ud conditions: stretched finger, shrunken finger and detached\ud finger, as well as a veridical baseline condition. Both\ud stretching and shrinking the stimulated finger enhanced\ud correct touch detections; however, the mechanisms underlying\ud this increase were found to be different. In contrast,\ud the detached appearance reduced false touch reports—possibly\ud due to reduced tactile noise, as a result of attention\ud being directed to the tip of the finger only. These findings\ud suggest that distorted representations of the body could\ud have different modulatory effects on attention to touch and\ud provide a link between perceived body representation and\ud somatosensory decision-making

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Section: Discussionsupporting

confidence: 91%

mentioning

confidence: 87%

Section: Mirage Systemmentioning

confidence: 99%

Section: Mirage Systemmentioning

confidence: 99%

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Multisensory distortions of the hand have differential effects on tactile perception

2015

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“…Moseley et al [11] found that magnifying the view of a chronically painful and dysfunctional arm using binoculars increased pain and swelling evoked by movement and Ramachandran et al [12] reducing the size of a reflected limb using mirror visual feedback reduced phantom limb pain. Preston and Newton [34] used real-time video capture techniques to manipulate a first person view of their hand so that it appeared stretched and shrunk in 20 individuals with painful osteoarthritic hands.…”

Section: Discussionmentioning

confidence: 99%

An investigation into enlarging and reducing the size of mirror reflections of the hand on experimentally-induced cold-pressor pain in healthy human participants

Johnson

Gohil

2016

Scandinavian Journal of Pain

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AbstractBackground and aimsMirror visual feedback may be a useful clinical tool for reducing pain. Research suggests that reducing the size of a non-painful reflected hand can alleviate complex regional pain syndrome in the affected hand that is out of view. In contrast, research on healthy humans exposed to experimentally induced pain suggests that reducing the appearance of the size of a reflected body part can increase pain. The aim of this study was to investigate the effect of enlarging and reducing the visual appearance of the size of a hand using mirror visual feedback on pain threshold, intensity and tolerance in healthy human participants exposed to cold-pressor pain.MethodsParticipants were a convenience sample of 20 unpaid, healthy pain free volunteers aged 18 years or above. Each participant took part in one experiment where they completed cold-pressor pain tests whilst observing normal, enlarged and reduced size reflections of a hand congruent to a hand immersed in the ice cold water. A 4 × 2 factorial repeated measures analysis of variance (ANOVA) was performed on time to pain threshold and pain tolerance, and pain intensity with Condition (four levels: no reflection, reduced reflection, normal reflection, enlarged reflection) being the within-subject factors and Sex (two levels: female, male) between-subject factors.ResultsThere were no significant effects for Condition, Sex, or Condition × Sex interaction for pain threshold, intensity or tolerance (p > 0.05). There were no significant differences between the 3 mirror reflection conditions for agreement with the statements: “It felt like I was looking directly at my hand rather than at a mirror image”; “It felt like the hand I was looking at was my hand”; and “Did it seem like the hand you saw was a right hand or a left hand?”. ConclusionEnlarging or reducing the size of a hand using mirror visual feedback did not alter pain perception in healthy human participants exposed to cold-pressor pain. The different sizes of hands generated by mirror visual feedback created an illusion of looking at their own hand but this was not as strong as looking directly at the hand.ImplicationsIn future, investigators and clinicians using mirror visual feedback may consider including an adaptive phase to ensure the reflection has been perceptually embodied. Reasons for the lack of effects are explored to inspire further research in the field.

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Mirror therapy, graded motor imagery and virtual illusion for the management of chronic pain

Plumbe¹,

Peters²,

Bennett³

et al. 2013

Cochrane Database of Systematic Reviews

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Analgesic effects of multisensory illusions in osteoarthritis

Cited by 67 publications

References 5 publications

Multisensory distortions of the hand have differential effects on tactile perception

Multisensory distortions of the hand have differential effects on tactile perception

An investigation into enlarging and reducing the size of mirror reflections of the hand on experimentally-induced cold-pressor pain in healthy human participants

Mirror therapy, graded motor imagery and virtual illusion for the management of chronic pain

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