Disturbed body integrity and the “rubber foot illusion”.

Lenggenhager, Bigna; Hilti, Leonie; Brugger, Peter

doi:10.1037/neu0000143

Cited by 58 publications

(67 citation statements)

References 42 publications

(83 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Only the temperature measure tentatively suggests a condition-specific effect by revealing a significantly smaller increase of temperature for asynchronous compared to synchronous stroking. This is in line with literature suggesting that a decrease in body temperature links to own-body disembodiment during illusory embodiment of a fake body (Moseley et al, 2008;Salomon, Lim, Pfeiffer, Gassert, & Blanke, 2013; but see also de Haan et al, 2017), or in neurological damage (Moseley et al, 2008; but see also Lenggenhager et al, 2015). As in previous literature, such relatively lower temperature was in our data specifically found for the stimulated hand (Macauda et al, 2015) and only after longer stimulation (cp.…”

Section: Physiological Measures Remain Largely Unchangedsupporting

confidence: 94%

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Lesur

Weijs

Simon

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

The loss of body ownership, the feeling that your body and its limbs no longer belong to you, presents a severe clinical condition that has proven difficult to study directly. We here propose a novel paradigm using mixed reality to interfere with natural embodiment using temporally conflicting sensory signals from the own hand. In Experiment 1 we investigated how such a mismatch affects phenomenological and physiological aspects of embodiment, and identified its most important dimensions using a principle component analysis. The results suggest that such a mismatch induces a strong reduction in embodiment accompanied by an increase in feelings of disownership and deafference, which was, however, not reflected in physiological changes. In Experiment 2 we refined the paradigm to measure perceptual thresholds for temporal mismatches and compared how different multimodal, mismatching information alters the sense of embodiment. The results showed that while visual delay decreased embodiment both while actively moving and during passive touch, the effect was stronger for the former. Our results extend previous findings as they demonstrate that a sense of disembodiment can be induced through controlled multimodal mismatches about one's own body and more so during active movement as compared to passive touch. Based on the ecologically more valid protocol we propose here, we argue that such a sense of disembodiment may fundamentally differ from disownership sensations as discussed in the rubber hand illusion literature, and emphasize its clinical relevance. This might importantly advance the current debate on the relative contribution of different modalities to our sense of body and its plasticity.

show abstract

Section: Physiological Measures Remain Largely Unchangedsupporting

confidence: 94%

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Lesur

Weijs

Simon

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…One node, the right frontal operculum is considered to be a premotor region in the broader sense as well and could therefore also be accounted for the sensorimotor system. The frontal operculum is importantly involved in the rubber hand illusion (Ehrsson, Spence, & Passingham, 2004), which consists in a distorted sense of self of one particular body part (Lenggenhager, Hilti, & Brugger, 2015). More broadly speaking, the same region is involved in the construction and maintenance of a coherent representation of the entire body (Moseley et al., 2012; Tsakiris, Hesse, Boy, Haggard, & Fink, 2007), a representation arguably disturbed in xenomelia.…”

Section: Discussionmentioning

confidence: 99%

Section: Structural Hyperconnectivity In Xenomeliamentioning

confidence: 99%

Structural and functional hyperconnectivity within the sensorimotor system in xenomelia

et al. 2017

Self Cite

View full text Add to dashboard Cite

IntroductionXenomelia is a rare condition characterized by the persistent and compulsive desire for the amputation of one or more physically healthy limbs. We highlight the neurological underpinnings of xenomelia by assessing structural and functional connectivity by means of whole‐brain connectome and network analyses of regions previously implicated in empirical research in this condition.MethodsWe compared structural and functional connectivity between 13 xenomelic men with matched controls using diffusion tensor imaging combined with fiber tractography and resting state functional magnetic resonance imaging. Altered connectivity in xenomelia within the sensorimotor system has been predicted.ResultsWe found subnetworks showing structural and functional hyperconnectivity in xenomelia compared with controls. These subnetworks were lateralized to the right hemisphere and mainly comprised by nodes belonging to the sensorimotor system. In the connectome analyses, the paracentral lobule, supplementary motor area, postcentral gyrus, basal ganglia, and the cerebellum were hyperconnected to each other, whereas in the xenomelia‐specific network analyses, hyperconnected nodes have been found in the superior parietal lobule, primary and secondary somatosensory cortex, premotor cortex, basal ganglia, thalamus, and insula.ConclusionsOur study provides empirical evidence of structural and functional hyperconnectivity within the sensorimotor system including those regions that are core for the reconstruction of a coherent body image. Aberrant connectivity is a common response to focal neurological damage. As exemplified here, it may affect different brain regions differentially. Due to the small sample size, our findings must be interpreted cautiously and future studies are needed to elucidate potential associations between hyperconnectivity and limb disownership reported in xenomelia.

show abstract

“…Therefore, PMv could be more related to the higher order inner body-experiences, whereas the parietal and insular cortex deficits result in a more primary disturbance when it comes to processing visual and sensory information leading to recognition of body-parts. This is underlined by a recent study of Lenggenhager et al in which 9 BIID subjects were able to experience a rubber foot illusion, although the vividness of the illusion was stronger than in controls [43]. Following this hypothesis, the paralyzation-variant can be seen as a ‘milder form of BIID’, disintegrating the multisensory information to the extent that limbs are not functioning.…”

Section: Discussionmentioning

confidence: 97%

The Desire for Amputation or Paralyzation: Evidence for Structural Brain Anomalies in Body Integrity Identity Disorder (BIID)

et al. 2016

View full text Add to dashboard Cite

BackgroundBody Integrity Identity Disorder (BIID) is a condition in which individuals perceive a mismatch between their internal body scheme and physical body shape, resulting in an absolute desire to be either amputated or paralyzed. The condition is hypothesized to be of congenital nature, but evidence for a neuro-anatomical basis is sparse.MethodsWe collected T1-weighted structural magnetic resonance imaging scans on a 3T scanner in eight individuals with BIID and 24 matched healthy controls, and analyzed the data using voxel-based morphometry.ResultsThe results showed reduced grey matter volume in the left dorsal and ventral premotor cortices and larger grey matter volume in the cerebellum (lobule VIIa) in individuals with BIID compared to controls.ConclusionThe premotor cortex and cerebellum are thought to be crucial for the experience of body-ownership and the integration of multisensory information. Our results suggest that BIID is associated with structural brain anomalies and might result from a dysfunction in the integration of multisensory information, leading to the feeling of disunity between the mental and physical body shape.

show abstract

Disturbed body integrity and the “rubber foot illusion”.

Cited by 58 publications

References 42 publications

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Achronopresence: how temporal visuotactile and visuomotor mismatches modulate embodiment

Structural and functional hyperconnectivity within the sensorimotor system in xenomelia

The Desire for Amputation or Paralyzation: Evidence for Structural Brain Anomalies in Body Integrity Identity Disorder (BIID)

Contact Info

Product

Resources

About