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Bodily illusion

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https://www.readbyqxmd.com/read/28334126/heartfelt-self-cardio-visual-integration-affects-self-face-recognition-and-interoceptive-cortical-processing
#1
Alejandra Sel, Ruben T Azevedo, Manos Tsakiris
The sense of body-ownership relies on the representation of both interoceptive and exteroceptive signals coming from one's body. However, it remains unknown how the integration of bodily signals coming from "outside" and "inside" the body is instantiated in the brain. Here, we used a modified version of the Enfacement Illusion to investigate whether the integration of visual and cardiac information can alter self-face recognition (Experiment 1) and neural responses to heartbeats (Experiment 2). We projected a pulsing shade, that was synchronous or asynchronous with the participant's heartbeat, onto a picture depicting the participant's face morphed with the face of an unfamiliar other...
October 5, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28326654/the-development-of-bodily-self-consciousness-changing-responses-to-the-full-body-illusion-in-childhood
#2
Dorothy Cowie, Aisling McKenna, Andrew J Bremner, Jane E Aspell
The present work investigates the development of bodily self-consciousness and its relation to multisensory bodily information, by measuring for the first time the development of responses to the full body illusion in childhood. We tested three age groups of children: 6- to 7-year-olds (n = 28); 8- to 9-year-olds (n = 21); 10- to 11-year-olds (n = 19), and a group of adults (n = 31). Each participant wore a head-mounted display (HMD) which displayed a view from a video camera positioned 2 metres behind their own back...
March 22, 2017: Developmental Science
https://www.readbyqxmd.com/read/28289799/does-affective-touch-influence-the-virtual-reality-full-body-illusion
#3
Jutta R de Jong, Anouk Keizer, Manja M Engel, H Chris Dijkerman
The sense of how we experience our physical body as our own represents a fundamental component of human self-awareness. Body ownership can be studied with bodily illusions which are generated by inducing a visuo-tactile conflict where individuals experience illusionary ownership over a fake body or body part, such as a rubber hand. Previous studies showed that different types of touch modulate the strength of experienced ownership over a rubber hand. Specifically, participants experienced more ownership after the rubber hand illusion was induced through affective touch vs non-affective touch...
March 13, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28284239/integrating-self-localization-proprioception-pain-and-performance
#4
Valeria Bellan, Sarah B Wallwork, Alberto Gallace, Charles Spence, G Lorimer Moseley
The ability to know where our own body and body parts are in space is often taken for granted, yet it is of fundamental importance for the majority of our everyday activities, let alone high performance activities such as dancing. This review focuses on the concept of self-localization, the monitoring of the space surrounding one's body, and the disruptions that occur in the presence of pain. A conceptual model is presented of the cortical body matrix with which to consider self-localization; also provided are its historical context, underlying assumptions, and current limitations...
March 1, 2017: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/28238849/self-face-recognition-shares-brain-regions-active-during-proprioceptive-illusion-in-the-right-inferior-fronto-parietal-superior-longitudinal-fasciculus-iii-network
#5
Tomoyo Morita, Daisuke N Saito, Midori Ban, Koji Shimada, Yuko Okamoto, Hirotaka Kosaka, Hidehiko Okazawa, Minoru Asada, Eiichi Naito
Proprioception is somatic sensation that allows us to sense and recognize position, posture, and their changes in our body parts. It pertains directly to oneself and may contribute to bodily awareness. Likewise, one's face is a symbol of oneself, so that visual self-face recognition directly contributes to the awareness of self as distinct from others. Recently, we showed that right-hemispheric dominant activity in the inferior fronto-parietal cortices, which are connected by the inferior branch of the superior longitudinal fasciculus (SLF III), is associated with proprioceptive illusion (awareness), in concert with sensorimotor activity...
February 24, 2017: Neuroscience
https://www.readbyqxmd.com/read/28222382/corporeal-illusions-in-chronic-spinal-cord-injuries
#6
Michele Scandola, Salvatore Maria Aglioti, Renato Avesani, Gianettore Bertagnoni, Anna Marangoni, Valentina Moro
While several studies have investigated corporeal illusions in patients who have suffered from a stroke or undergone an amputation, only anecdotal or single case reports have explored this phenomenon after spinal cord injury. Here we examine various different types of bodily misperceptions in a comparatively large group of 49 people with spinal cord injury in the post-acute and chronic phases after the traumatic lesion onset. An extensive battery of questionnaires concerning a variety of body related feelings was administered and the results were correlated to the main clinical variables...
March 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28053026/self-grounded-vision-hand-ownership-modulates-visual-location-through-cortical-%C3%AE-and-%C3%AE-oscillations
#7
Nathan Faivre, Jonathan Dönz, Michele Scandola, Herberto Dhanis, Javier Bello Ruiz, Fosco Bernasconi, Roy Salomon, Olaf Blanke
Vision is known to be shaped by context, defined by environmental and bodily signals. In the Taylor illusion, the size of an afterimage projected on one's hand changes according to proprioceptive signals conveying hand position. Here, we assessed whether the Taylor illusion does not just depend on the physical hand position, but also on bodily self-consciousness as quantified through illusory hand ownership. Relying on the somatic rubber hand illusion, we manipulated hand ownership, such that participants embodied a rubber hand placed next to their own hand...
January 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27880880/heartfelt-embodiment-changes-in-body-ownership-and-self-identification-produce-distinct-changes-in-interoceptive-accuracy
#8
Maria L Filippetti, Manos Tsakiris
Interoceptive and exteroceptive information are both essential for the construction and update of self-awareness. Whereas several studies have shown how interoceptive accuracy or cardiac feedback influences body-awareness, no studies have looked at the reverse effect, namely how exteroceptively-driven changes in body-ownership and self-identification can influence individuals' ability to detect internal bodily signals. We exposed participants to the Rubber Hand Illusion (Experiment 1) and to the Enfacement Illusion (Experiment 2), and tested how this change in the sense of body-ownership and self-identification affected their interoceptive accuracy (IAcc)...
February 2017: Cognition
https://www.readbyqxmd.com/read/27852022/-parietal-cortices-and-body-information
#9
REVIEW
Eiichi Naito, Kaoru Amemiya, Tomoyo Morita
Proprioceptive signals originating from skeletal muscles and joints contribute to the formation of both the human body schema and the body image. In this chapter, we introduce various types of bodily illusions that are elicited by proprioceptive inputs, and we discuss distinct functions implemented by different parietal cortices. First, we illustrate the primary importance of the motor network in the processing of proprioceptive (kinesthetic) signals originating from muscle spindles. Next, we argue that the right inferior parietal cortex, in concert with the inferior frontal cortex (both regions connected by the inferior branch of the superior longitudinal fasciculus-SLF III), may be involved in the conscious experience of body image...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27826275/non-hierarchical-influence-of-visual-form-touch-and-position-cues-on-embodiment-agency-and-presence-in-virtual-reality
#10
Stephen C Pritchard, Regine Zopf, Vince Polito, David M Kaplan, Mark A Williams
The concept of self-representation is commonly decomposed into three component constructs (sense of embodiment, sense of agency, and sense of presence), and each is typically investigated separately across different experimental contexts. For example, embodiment has been explored in bodily illusions; agency has been investigated in hypnosis research; and presence has been primarily studied in the context of Virtual Reality (VR) technology. Given that each component involves the integration of multiple cues within and across sensory modalities, they may rely on similar underlying mechanisms...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27821580/self-grounded-vision-hand-ownership-modulates-visual-location-through-cortical-beta-and-gamma-oscillations
#11
Nathan Faivre, Jonathan Doenz, Michele Scandola, Herberto Dhanis, Javier Bello Ruiz, Fosco Bernasconi, Roy Salomon, Olaf Blanke
Vision is known to be shaped by context, defined by environmental and bodily signals. In the Taylor illusion, the size of an afterimage projected on one's hand changes according to proprioceptive signals conveying hand position. Here, we assessed whether the Taylor illusion does not just depend on the physical hand position, but also on bodily self-consciousness as quantified through illusory hand ownership. Relying on the somatic rubber hand illusion, we manipulated hand ownership, such that participants embodied a rubber hand placed next to their own hand...
November 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27689514/the-second-me-seeing-the-real-body-during-humanoid-robot-embodiment-produces-an-illusion-of-bi-location
#12
Laura Aymerich-Franch, Damien Petit, Gowrishankar Ganesh, Abderrahmane Kheddar
Whole-body embodiment studies have shown that synchronized multi-sensory cues can trick a healthy human mind to perceive self-location outside the bodily borders, producing an illusion that resembles an out-of-body experience (OBE). But can a healthy mind also perceive the sense of self in more than one body at the same time? To answer this question, we created a novel artificial reduplication of one's body using a humanoid robot embodiment system. We first enabled individuals to embody the humanoid robot by providing them with audio-visual feedback and control of the robot head movements and walk, and then explored the self-location and self-identification perceived by them when they observed themselves through the embodied robot...
September 27, 2016: Consciousness and Cognition
https://www.readbyqxmd.com/read/27651139/body-ownership-and-agency-task-dependent-effects-of-the-virtual-hand-illusion-on-proprioceptive-drift
#13
Satoshi Shibuya, Satoshi Unenaka, Yukari Ohki
Body ownership and agency are fundamental to self-consciousness. These bodily experiences have been intensively investigated using the rubber hand illusion, wherein participants perceive a fake hand as their own. After presentation of the illusion, the position of the participant's hand then shifts toward the location of the fake hand (proprioceptive drift). However, it remains controversial whether proprioceptive drift is able to provide an objective measurement of body ownership, and whether agency also affects drift...
September 20, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27646600/body-representations-in-schizophrenia-an-alteration-of-body-structural-description-is-common-to-people-with-schizophrenia-while-alterations-of-body-image-worsen-with-passivity-symptoms
#14
Kyran T Graham-Schmidt, Mathew T Martin-Iverson, Nicholas P Holmes, Flavie Waters
INTRODUCTION: Individuals with schizophrenia, particularly those with passivity symptoms, often feel that their actions and thoughts are controlled by an external agent. Recent evidence has elucidated the role of body representations in the aetiology of passivity symptoms, yet one representation - body structural description - has not yet been examined. Additionally, body image has rarely been examined outside of bodily illusions (e.g., rubber hand experiments) and external validation is required...
2016: Cognitive Neuropsychiatry
https://www.readbyqxmd.com/read/27639162/body-distortions-in-anorexia-nervosa-evidence-for-changed-processing-of-multisensory-bodily-signals
#15
Regine Zopf, Erika Contini, Chris Fowler, Naresh Mondraty, Mark A Williams
Body size and shape distortion is a core feature of Anorexia Nervosa (AN) - patients experience their body as fat while objectively being very thin. The cause of this distortion is unclear and disturbances in body perception could be involved. Body perception comprises estimating shape and location of one's body and requires integrating multisensory signals. We investigated if and how body location perception is changed and tested 23 AN patients and 23 healthy controls (HC) in a Rubber Hand Illusion (RHI) reaching paradigm...
November 30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27620801/causal-dynamics-of-scalp-electroencephalography-oscillation-during-the-rubber-hand-illusion
#16
Noriaki Kanayama, Alberto Morandi, Kazuo Hiraki, Francesco Pavani
Rubber hand illusion (RHI) is an important phenomenon for the investigation of body ownership and self/other distinction. The illusion is promoted by the spatial and temporal contingencies of visual inputs near a fake hand and physical touches to the real hand. The neural basis of this phenomenon is not fully understood. We hypothesized that the RHI is associated with a fronto-parietal circuit, and the goal of this study was to determine the dynamics of neural oscillation associated with this phenomenon. We measured electroencephalography while delivering spatially congruent/incongruent visuo-tactile stimulations to fake and real hands...
January 2017: Brain Topography
https://www.readbyqxmd.com/read/27511016/transient-modulations-of-neural-responses-to-heartbeats-covary-with-bodily-self-consciousness
#17
Hyeong-Dong Park, Fosco Bernasconi, Javier Bello-Ruiz, Christian Pfeiffer, Roy Salomon, Olaf Blanke
UNLABELLED: Recent research has investigated self-consciousness associated with the multisensory processing of bodily signals (e.g., somatosensory, visual, vestibular signals), a notion referred to as bodily self-consciousness, and these studies have shown that the manipulation of bodily inputs induces changes in bodily self-consciousness such as self-identification. Another line of research has highlighted the importance of signals from the inside of the body (e.g., visceral signals) and proposed that neural representations of internal bodily signals underlie self-consciousness, which to date has been based on philosophical inquiry, clinical case studies, and behavioral studies...
August 10, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27485049/the-sense-of-body-ownership-relaxes-temporal-constraints-for-multisensory-integration
#18
Antonella Maselli, Konstantina Kilteni, Joan López-Moliner, Mel Slater
Experimental work on body ownership illusions showed how simple multisensory manipulation can generate the illusory experience of an artificial limb as being part of the own-body. This work highlighted how own-body perception relies on a plastic brain representation emerging from multisensory integration. The flexibility of this representation is reflected in the short-term modulations of physiological states and perceptual processing observed during these illusions. Here, we explore the impact of ownership illusions on the temporal dimension of multisensory integration...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27378965/a-novel-technique-for-improving-bodily-experience-in-a-non-operable-super-super-obesity-case
#19
Silvia Serino, Federica Scarpina, Anouk Keizer, Elisa Pedroli, Antonios Dakanalis, Gianluca Castelnuovo, Alice Chirico, Margherita Novelli, Santino Gaudio, Giuseppe Riva
INTRODUCTION: The available clinical guidelines for super-super obese patients (i.e., with body mass index (BMI) > 60 kg/m(2)) that are not suitable for bariatric surgery mandate a palliative multidisciplinary treatment (i.e., production and maintenance of weight loss) provided in a center of excellence. However, the modality and the impact of this approach are still controversial. Moreover, it is not able to address the high level of body dissatisfaction and body distortions that are common among these patients...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27378895/bodily-experience-in-schizophrenia-factors-underlying-a-disturbed-sense-of-body-ownership
#20
REVIEW
Maayke Klaver, H Chris Dijkerman
Emerging evidence is now challenging the view that patients diagnosed with schizophrenia experience a selective deficit in their sense of agency. Additional disturbances seem to exist in their sense of body ownership. However, the factors underlying this disturbance in body ownership remain elusive. Knowledge of these factors, and increased understanding of how body ownership is related to other abnormalities seen in schizophrenia, could ultimately advance development of new treatments. Research on body ownership in schizophrenia has mainly been investigated with the rubber hand illusion (RHI)...
2016: Frontiers in Human Neuroscience
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