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Bodily illusion

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https://www.readbyqxmd.com/read/29765311/altered-sense-of-body-ownership-and-agency-in-posttraumatic-stress-disorder-and-its-dissociative-subtype-a-rubber-hand-illusion-study
#1
Daniela Rabellino, Dalila Burin, Sherain Harricharan, Chantelle Lloyd, Paul A Frewen, Margaret C McKinnon, Ruth A Lanius
Traumatic experiences have been linked to the development of altered states of consciousness affecting bodily perception, including alterations in body ownership and in sense of agency, the conscious experience of the body as one's own and under voluntary control. Severe psychological trauma and prolonged distress may lead to posttraumatic stress disorder (PTSD). Together, symptoms of derealization and, related specifically to the sense of body ownership and agency, of depersonalization (where parts of the body or the entire body itself is perceived as detached and out of control), constitute the dissociative subtype (PTSD+DS)...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29762066/the-role-of-age-on-multisensory-bodily-experience-an-experimental-study-with-a-virtual-reality-full-body-illusion
#2
Silvia Serino, Federica Scarpina, Antonios Dakanalis, Anouk Keizer, Elisa Pedroli, Gianluca Castelnuovo, Alice Chirico, Valentina Catallo, Daniele di Lernia, Giuseppe Riva
A growing body of evidence demonstrated that it is feasible to induce ownership over an artificial body to alter bodily experience. However, several uncharted aspects about full-body illusion applications need to be tackled before a complete exploitation of these methods in clinical practice. This work is devoted to explore possible individual age-related differences in shaping changes in body representations induced with a full-body illusion. A total of 40 women were divided into two different age groups according to the median of the variable age...
May 2018: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/29755378/the-architectonic-experience-of-body-and-space-in-augmented-interiors
#3
Isabella Pasqualini, Maria Laura Blefari, Tej Tadi, Andrea Serino, Olaf Blanke
The environment shapes our experience of space in constant interaction with the body. Architectonic interiors amplify the perception of space through the bodily senses; an effect also known as embodiment. The interaction of the bodily senses with the space surrounding the body can be tested experimentally through the manipulation of multisensory stimulation and measured via a range of behaviors related to bodily self-consciousness. Many studies have used Virtual Reality to show that visuotactile conflicts mediated via a virtual body or avatar can disrupt the unified subjective experience of the body and self...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29624596/embodied-pain-in-fibromyalgia-disturbed-somatorepresentations-and-increased-plasticity-of-the-body-schema
#4
Endika Martínez, Zigor Aira, Itsaso Buesa, Ibane Aizpurua, Diego Rada, Jon Jatsu Azkue
Fibromyalgia syndrome (FMS) is a highly prevalent, chronic musculoskeletal condition characterized by widespread pain and evoked pain at tender points. This study evaluated various aspects of body awareness in a sample of 14 women with FMS and 13 healthy controls, such as plasticity of the body schema, body esteem, and interoceptive awareness. To this end, the Rubber Hand Illusion (RHI), the Body Esteem Scale (BES), and the Body Perception Questionnaire (BPQ) were used, respectively. Consistent with increased plasticity of the body schema, FMS patients scored higher, with large or very large effect sizes, across all three domains evaluated in the RHI paradigm, namely proprioceptive drift and perceived ownership and motor control over the rubber hand...
2018: PloS One
https://www.readbyqxmd.com/read/29607486/flesh-and-bone-digital-sociality-on-how-humans-may-go-virtual
#5
Alessandro Monti, Salvatore Maria Aglioti
Research on virtual reality (VR) has gained momentum over the last fifteen years or so. In their review, Pan and Hamilton (2018, British Journal of Psychology) show how the different types of VR devices have the potential to probe fundamental psychological constructs, like those underlying social interactions. Expanding on their work, we propose a research agenda to increase the sense of co-presence and make VR more real than reality through bodily illusions, multisensory stimulation, self-conscious emotions, and multisubject social cognition...
April 1, 2018: British Journal of Psychology
https://www.readbyqxmd.com/read/29478669/the-enfacement-illusion-a-window-on-the-plasticity-of-the-self
#6
REVIEW
Giuseppina Porciello, Ilaria Bufalari, Ilaria Minio-Paluello, Enrico Di Pace, Salvatore Maria Aglioti
Understanding how self-representation is built, maintained and updated across the lifespan is a fundamental challenge for cognitive psychology and neuroscience. Studies demonstrate that the detection of body-related multisensory congruency builds bodily and facial self-representations that are crucial to developing self-recognition. Studies showing that the bodily self is more malleable than previously believed were mainly concerned with full-bodies and non-facial body parts. Crucially, however, intriguing recent evidence indicates that simple experimental manipulations could even affect self-face representation that has long been considered a stable construct impervious to change...
February 9, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29471714/the-bodily-illusion-in-adverse-conditions-virtual-arm-ownership-during-visuomotor-mismatch
#7
Barbara Caola, Martina Montalti, Alessandro Zanini, Antony Leadbetter, Matteo Martini
Classically, body ownership illusions are triggered by cross-modal synchronous stimulations, and hampered by multisensory inconsistencies. Nonetheless, the boundaries of such illusions have been proven to be highly plastic. In this immersive virtual reality study, we explored whether it is possible to induce a sense of body ownership over a virtual body part during visuomotor inconsistencies, with or without the aid of concomitant visuo-tactile stimulations. From a first-person perspective, participants watched a virtual tube moving or an avatar's arm moving, with or without concomitant synchronous visuo-tactile stimulations on their hand...
January 1, 2018: Perception
https://www.readbyqxmd.com/read/29460981/non-invasive-brain-stimulation-of-motor-cortex-induces-embodiment-when-integrated-with-virtual-reality-feedback
#8
M Bassolino, M Franza, J Bello Ruiz, M Pinardi, T Schmidlin, M A Stephan, M Solcà, A Serino, O Blanke
Previous evidence highlighted the multisensory-motor origin of embodiment - that is, the experience of having a body and of being in control of it - and the possibility of experimentally manipulating it. For instance, an illusory feeling of embodiment towards a fake hand can be triggered by providing synchronous visuo-tactile stimulation to the hand of participants and to a fake hand or by asking participants to move their hand and observe a fake hand moving accordingly (rubber hand illusion). Here, we tested whether it is possible to manipulate embodiment not through stimulation of the participant's hand, but by directly tapping into the brain's hand representation via non-invasive brain stimulation...
April 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29413873/spatial-attention-and-the-malleability-of-bodily-self-in-the-elderly
#9
Daniel Zeller, Marcus Hullin
A right-hemispheric specificity has been suggested both for spatial attention and for the feeling of body-ownership. Here, we assessed lateralization of spatial attention (Milner landmark task), rubber hand illusion (RHI), and their relationship in a group of 59 healthy elderly subjects. The occurrence of the RHI was assessed by objective (proprioceptive drift) and subjective (questionnaire) measures. Spatial attention was asymmetrical, with a slight, neglect-like overestimation of the right segment of mid-bisected lines...
March 2018: Consciousness and Cognition
https://www.readbyqxmd.com/read/29322244/metacontrol-and-body-ownership-divergent-thinking-increases-the-virtual-hand-illusion
#10
Ke Ma, Bernhard Hommel
The virtual hand illusion (VHI) paradigm demonstrates that people tend to perceive agency and bodily ownership for a virtual hand that moves in synchrony with their own movements. Given that this kind of effect can be taken to reflect self-other integration (i.e., the integration of some external, novel event into the representation of oneself), and given that self-other integration has been previously shown to be affected by metacontrol states (biases of information processing towards persistence/selectivity or flexibility/integration), we tested whether the VHI varies in size depending on the metacontrol bias...
January 10, 2018: Psychological Research
https://www.readbyqxmd.com/read/29151088/cotard-syndrome
#11
Sebastian Dieguez
Cotard's syndrome is often described as the delusional belief that one is dead or non-existent. However, Jules Cotard's initial description (1880) of the "delusion of negations" was much richer and also involved delusions and claims of immortality and enormity, feelings of damnation, and illusions of bodily dissolution and transformation. Alternatively conceived as an extreme case of depression, hypochondria, or psychosis, the condition is considered rare and remains poorly understood. Cotard himself provided a taxonomy and several explanations for the condition, focusing on its distinction from classical persecutory delusions and suggesting that it could be a kind of reversed grandiosity...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29122723/the-neuronal-network-involved-in-self-attribution-of-an-artificial-hand-a-lesion-network-symptom-mapping-study
#12
Max Wawrzyniak, Julian Klingbeil, Daniel Zeller, Dorothee Saur, Joseph Classen
The feeling of body-ownership can be experimentally manipulated using the rubber hand illusion (RHI) paradigm. Participants experience a sense of ownership over an artificial hand when their hidden real hand and the visible artificial hand are synchronously stroked. Using lesion masks and behavioral data from a previous study on RHI failure in acute stroke patients, we here employed lesion network-symptom-mapping (LNSM) based on normative functional connectome data to identify lesion-dependent network connectivity related to the experience of self-attribution of an artificial hand in the RHI paradigm...
February 1, 2018: NeuroImage
https://www.readbyqxmd.com/read/29036731/rethinking-body-ownership-in-schizophrenia-experimental-and-meta-analytical-approaches-show-no-evidence-for-deficits
#13
Albulena Shaqiri, Maya Roinishvili, Mariia Kaliuzhna, Ophélie Favrod, Eka Chkonia, Michael H Herzog, Olaf Blanke, Roy Salomon
Schizophrenia is a severe psychiatric disorder, in which patients experience an abnormal sense of self. While deficits in sensorimotor self-representation (agency) are well documented in schizophrenia, less is known about other aspects of bodily self-representation (body ownership). Here, we tested a large cohort (N = 59) of chronic schizophrenia patients and matched controls (N = 30) on a well-established body illusion paradigm, the Full Body Illusion (FBI). In this paradigm, changes in body ownership are induced through prolonged multisensory stimulation, in which participants are stroked on their back while seeing the stroking on the back of a virtual body...
July 25, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28891265/altered-bodily-self-consciousness-in-multiple-sclerosis
#14
Elena Nava, Flavia Mattioli, Chiara Gamberini, Chiara Stampatori, Fabio Bellomi, Chiara Turati, Ruggero Capra, Nadia Bolognini
In this study, we assessed the impact of multiple sclerosis (MS) on bodily self-consciousness (BSC) using the Rubber Hand Illusion. Patients with MS showed a dissociation between body ownership and self-location: they did report an explicit ownership of the rubber hand, but they did not point towards it, showing a defective ability of localizing body parts in space. This evidence indicates that MS may affect selective components of BSC, whose impairment may contribute to, and even worsen, the functional disability of MS...
September 10, 2017: Journal of Neuropsychology
https://www.readbyqxmd.com/read/28864079/rubber-hand-illusion-increases-pain-caused-by-electric-stimuli
#15
Marta Siedlecka, Nadine Spychała, Marta Łukowska, Karolina Wiercioch, Michał Wierzchoń
The rubber hand illusion (RHI) has been shown to alter the experience of pain, although studies have yielded inconsistent results. In this experiment we tested the influence of the RHI on the intensity of pain caused by electric stimuli. Electric stimuli were delivered to participants' experimental and control hands before RHI induction (control condition) and afterward (experimental condition), in a procedure that was double-blind with respect to location and strength of noxious stimulation. All hands were covered during the stimulation to avoid the analgesic effect of seeing one's own body part...
January 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28735225/no-consistent-cooling-of-the-real-hand-in-the-rubber-hand-illusion
#16
Alyanne M de Haan, Haike E Van Stralen, Miranda Smit, Anouk Keizer, Stefan Van der Stigchel, H Chris Dijkerman
In the rubber hand illusion (RHI), participants view a rubber hand that is stroked synchronously with their real, hidden hand. This procedure results in experiencing an increased sense of ownership over the rubber hand and demonstrates how multisensory information (vision, touch) can influence the sense of body ownership. However, it has also been suggested that a (lack of) sense of ownership over an own body part may in turn influence bodily processes. This suggestion has previously been supported by the observation that a decrease in skin temperature in the real hand correlated with ownership over the rubber hand...
September 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28720401/multisensory-integration-induces-body-ownership-of-a-handtool-but-not-any-handtool
#17
Veronica Weser, Gianluca Finotti, Marcello Costantini, Dennis R Proffitt
Bodily boundaries are computed by integrating multisensory bodily signals and can be experimentally manipulated using bodily illusions. Research on tool use demonstrates that tools alter body representations motorically to account for changes in a user's action repertoire. The present experiment sought to unify perceptual and motoric accounts of tool embodiment using a modified Rubber Hand Illusion (RHI) that also addressed the skill and practice aspects of the tool use literature. In Experiment 1, synchronous multisensory stimulation induced perceptual embodiment of a tool, chopsticks...
July 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28634447/the-moving-rubber-hand-illusion-reveals-that-explicit-sense-of-agency-for-tapping-movements-is-preserved-in-functional-movement-disorders
#18
Angela Marotta, Federica Bombieri, Massimiliano Zampini, Federico Schena, Carlo Dallocchio, Mirta Fiorio, Michele Tinazzi
Functional movement disorders (FMD) are characterized by motor symptoms (e.g., tremor, gait disorder, and dystonia) that are not compatible with movement abnormalities related to a known organic cause. One key clinical feature of FMD is that motor symptoms are similar to voluntary movements but are subjectively experienced as involuntary by patients. This gap might be related to abnormal self-recognition of bodily action, which involves two main components: sense of agency and sense of body ownership. The aim of this study was to systematically investigate whether this function is altered in FMD, specifically focusing on the subjective feeling of agency, body ownership, and their interaction during normal voluntary movements...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28532579/interoceptive-ingredients-of-body-ownership-affective-touch-and-cardiac-awareness-in-the-rubber-hand-illusion
#19
Laura Crucianelli, Charlotte Krahé, Paul M Jenkinson, Aikaterini Katerina Fotopoulou
The sense of body ownership represents a fundamental aspect of bodily self-consciousness. Using multisensory integration paradigms, recent studies have shown that both exteroceptive and interoceptive information contribute to our sense of body ownership. Interoception refers to the physiological sense of the condition of the body, including afferent signals that originate inside the body and outside the body. However, it remains unclear whether individual sensitivity to interoceptive modalities is unitary or differs between modalities...
May 1, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28522968/the-effect-of-visual-spatial-and-temporal-manipulations-on-embodiment-and-action
#20
Natasha Ratcliffe, Roger Newport
The feeling of owning and controlling the body relies on the integration and interpretation of sensory input from multiple sources with respect to existing representations of the bodily self. Illusion paradigms involving multisensory manipulations have demonstrated that while the senses of ownership and agency are strongly related, these two components of bodily experience may be dissociable and differentially affected by alterations to sensory input. Importantly, however, much of the current literature has focused on the application of sensory manipulations to external objects or virtual representations of the self that are visually incongruent with the viewer's own body and which are not part of the existing body representation...
2017: Frontiers in Human Neuroscience
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