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https://www.readbyqxmd.com/read/28080303/the-development-of-a-cross-modal-sense-of-body-ownership
#1
Elena Nava, Nadia Bolognini, Chiara Turati
In this study, we investigated the contribution of tactile and proprioceptive cues to the development of the sense of body ownership by testing the susceptibility of 4- to 5-year-old children, 8- to 9-year-old children, and adults to the somatic rubber-hand illusion (SRHI). We found that feelings of owning a rubber hand in the SHRI paradigm, as assessed by explicit reports (i.e., questionnaire), are already present by age 4 and do not change throughout development. In contrast, the effect of the illusion on the sense of hand position, as assessed by a pointing task, was present only in 8- to 9-year-old children and adults; the magnitude of such capture increased with age...
January 1, 2017: Psychological Science
https://www.readbyqxmd.com/read/28079118/thermal-grill-conditioning-effect-on-contact-heat-evoked-potentials
#2
Catherine R Jutzeler, Freda M Warner, Johann Wanek, Armin Curt, John L K Kramer
The 'thermal grill illusion' (TGI) is a unique cutaneous sensation of unpleasantness, induced through the application of interlacing warm and cool stimuli. While previous studies have investigated optimal parameters and subject characteristics to evoke the illusion, our aim was to examine the modulating effect as a conditioning stimulus. A total of 28 healthy control individuals underwent three testing sessions on separate days. Briefly, 15 contact heat stimuli were delivered to the right hand dorsum, while the left palmar side of the hand was being conditioned with either neutral (32 °C), cool (20 °C), warm (40 °C), or TGI (20/40 °C)...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078975/the-uniformity-illusion
#3
Marte Otten, Yair Pinto, Chris L E Paffen, Anil K Seth, Ryota Kanai
Vision in the fovea, the center of the visual field, is much more accurate and detailed than vision in the periphery. This is not in line with the rich phenomenology of peripheral vision. Here, we investigated a visual illusion that shows that detailed peripheral visual experience is partially based on a reconstruction of reality. Participants fixated on the center of a visual display in which central stimuli differed from peripheral stimuli. Over time, participants perceived that the peripheral stimuli changed to match the central stimuli, so that the display seemed uniform...
January 2017: Psychological Science
https://www.readbyqxmd.com/read/28077329/body-schema-plasticity-after-stroke-subjective-and-neurophysiological-correlates-of-the-rubber-hand-illusion
#4
Roberto Llorens, Adrián Borrego, Priscila Palomo, Ausiàs Cebolla, Enrique Noé, Sergi Bermúdez I Badia, Rosa Baños
Stroke can lead to motor impairments that can affect the body structure and restraint mobility. We hypothesize that brain lesions and their motor sequelae can distort the body schema, a sensorimotor map of body parts and elements in the peripersonal space through which human beings embody the reachable space and ready the body for forthcoming movements. Two main constructs have been identified in the embodiment mechanism: body-ownership, the sense that the body that one inhabits is his/her own, and agency, the sense that one can move and control his/her body...
January 8, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28074671/effect-of-illusory-kinesthesia-on-hand-function-in-patients-with-distal-radius-fractures-a-quasi-randomized-controlled-study
#5
Ryota Imai, Michihiro Osumi, Tomoya Ishigaki, Shu Morioka
OBJECTIVES: We investigated the effects of the illusion of motion through tendon vibration on hand function in patients with distal radius fractures. SETTING: Kawachi General Hospital, Japan. SUBJECTS: A total of 22 patients with distal radius fractures were divided into either an illusory kinesthesia group ( n = 11) or a control group ( n = 11). INTERVENTION: We performed the intervention for seven consecutive days after surgery...
January 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28072708/life-threatening-motor-vehicle-crashes-in-bright-sunlight
#6
Donald A Redelmeier, Sheharyar Raza
: Bright sunlight may create visual illusions that lead to driver error, including fallible distance judgment from aerial perspective. We tested whether the risk of a life-threatening motor vehicle crash was increased when driving in bright sunlight.This longitudinal, case-only, paired-comparison analysis evaluated patients hospitalized because of a motor vehicle crash between January 1, 1995 and December 31, 2014. The relative risk of a crash associated with bright sunlight was estimated by evaluating the prevailing weather at the time and place of the crash compared with the weather at the same hour and location on control days a week earlier and a week later...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28071707/the-content-of-imagined-sounds-changes-visual-motion-perception-in-the-cross-bounce-illusion
#7
Christopher C Berger, H Henrik Ehrsson
Can what we imagine hearing change what we see? Whether imagined sensory stimuli are integrated with external sensory stimuli to shape our perception of the world has only recently begun to come under scrutiny. Here, we made use of the cross-bounce illusion in which an auditory stimulus presented at the moment two passing objects meet promotes the perception that the objects bounce off rather than cross by one another to examine whether the content of imagined sound changes visual motion perception in a manner that is consistent with multisensory integration...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070622/haptic-feedback-attenuates-illusory-bias-in-pantomime-grasping-evidence-for-a-visuo-haptic-calibration
#8
Jillian Chan, Matthew Heath
Relative visual information has been shown to mediate grasping responses directed to an area previously occupied by a target object (i.e., pantomime-grasping) and is an information type functionally distinct from the absolute visual information supporting naturalistic grasping (i.e., grasping a physical target). Pantomime- and naturalistic grasps differ not only in terms of their visual properties, but also because the former lacks physical interaction with a target object (i.e., no-haptic feedback). The absence of haptic feedback may represent a reason why pantomime- and naturalistic grasps differ...
January 9, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28068368/a-virtual-out-of-body-experience-reduces-fear-of-death
#9
Pierre Bourdin, Itxaso Barberia, Ramon Oliva, Mel Slater
Immersive virtual reality can be used to visually substitute a person's real body by a life-sized virtual body (VB) that is seen from first person perspective. Using real-time motion capture the VB can be programmed to move synchronously with the real body (visuomotor synchrony), and also virtual objects seen to strike the VB can be felt through corresponding vibrotactile stimulation on the actual body (visuotactile synchrony). This setup typically gives rise to a strong perceptual illusion of ownership over the VB...
2017: PloS One
https://www.readbyqxmd.com/read/28067329/perceptual-similarity-and-the-neural-correlates-of-geometrical-illusions-in-human-brain-structure
#10
Vadim Axelrod, D Samuel Schwarzkopf, Sharon Gilaie-Dotan, Geraint Rees
Geometrical visual illusions are an intriguing phenomenon, in which subjective perception consistently misjudges the objective, physical properties of the visual stimulus. Prominent theoretical proposals have been advanced attempting to find common mechanisms across illusions. But empirically testing the similarity between illusions has been notoriously difficult because illusions have very different visual appearances. Here we overcome this difficulty by capitalizing on the variability of the illusory magnitude across participants...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28054811/overdistribution-illusions-categorical-judgments-produce-them-confidence-ratings-reduce-them
#11
C J Brainerd, K Nakamura, V F Reyna, R E Holliday
Overdistribution is a form of memory distortion in which an event is remembered as belonging to too many episodic states, states that are logically or empirically incompatible with each other. We investigated a response formatting method of suppressing 2 basic types of overdistribution, disjunction and conjunction illusions, which parallel some classic illusions in the judgment and decision making literature. In this method, subjects respond to memory probes by rating their confidence that test cues belong to specific episodic states (e...
January 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28054275/a-comparison-of-colour-shape-and-flash-induced-illusory-line-motion
#12
Jeff P Hamm
When a bar suddenly appears between two boxes, the bar will appear to shoot away from the box that matches it in colour or in shape-a phenomenon referred to as attribute priming of illusory line motion (ILM; colourILM and shapeILM, respectively). If the two boxes are identical, ILM will still occur away from a box if it changes luminance shortly before the presentation of the bar (flashILM). This flash condition has been suggested to produce the illusory motion due to the formation of an attentional gradient surrounding the flashed location...
January 4, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28053026/self-grounded-vision-hand-ownership-modulates-visual-location-through-cortical-%C3%AE-and-%C3%AE-oscillations
#13
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/28050187/detection-of-borna-disease-virus-bdv-in-patients-with-first-episode-of-schizophrenia
#14
Hasan Soltani, Serwa Mohammadzadeh, Manoochehr Makvandi, Siroos Pakseresht, Alireza Samarbaf-Zadeh
Objective: Schizophrenia is a complex widespread neuropsychiatric disorder. This illness encompasses a complex debilitating mental disorder causing illusion, delusion, disturbed relationship, low motivation and decline of emotion. Viral infection of the brain including Borna Disease Virus (BDV) may play a role in transient or permanent neurological and behavioral abnormalities. This role of Borna virus has not been resolved outright yet, and based on published papers investigation examining the role of this virus in schizophrenia is in progress worldwide...
October 2016: Iranian Journal of Psychiatry
https://www.readbyqxmd.com/read/28045614/altering-the-natural-history-of-oligometastatic-prostate-cancer-with-local-therapies-reality-versus-illusion
#15
Phuoc T Tran, Emmanuel S Antonarakis
No abstract text is available yet for this article.
January 3, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28044024/an-auditory-illusion-reveals-the-role-of-streaming-in-the-temporal-misallocation-of-perceptual-objects
#16
Anahita H Mehta, Nori Jacoby, Ifat Yasin, Andrew J Oxenham, Shihab A Shamma
This study investigates the neural correlates and processes underlying the ambiguous percept produced by a stimulus similar to Deutsch's 'octave illusion', in which each ear is presented with a sequence of alternating pure tones of low and high frequencies. The same sequence is presented to each ear, but in opposite phase, such that the left and right ears receive a high-low-high … and a low-high-low … pattern, respectively. Listeners generally report hearing the illusion of an alternating pattern of low and high tones, with all the low tones lateralized to one side and all the high tones lateralized to the other side...
February 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28041532/laterality-and-body-ownership-effect-of-handedness-on-experience-of-the-rubber-hand-illusion
#17
M Smit, D I Kooistra, I J M van der Ham, H C Dijkerman
Body ownership has mainly been linked to the right hemisphere and larger interhemispheric connectivity has been shown to be associated with greater right hemispheric activation. Mixed-handed participants tend to have more interhemispheric connectivity compared to extreme handed participants. The aim of this study was to examine whether feelings of ownership as assessed with the rubber hand illusion (RHI) are differentiated by handedness and differed between the left and right hand. Sinistrals-, dextrals-, and mixed-handed individuals (n = 63) were subjected to the RHI...
January 2, 2017: Laterality
https://www.readbyqxmd.com/read/28033484/interaction-of-perception-and-action-in-discrete-and-continuous-rapid-aiming-tasks
#18
Sushma Alphonsa, Boyi Dai, Tami Benham-Deal, Qin Zhu
Previously, we have shown that discrete and continuous rapid aiming tasks are governed by distinct visuomotor control mechanisms by assessing the combined visual illusion effects on the perceived and effective index of difficulty (ID). All participants were perceptually biased by the combined visual illusion before they performed the rapid aiming tasks. In the current study, the authors manipulated the order of performing perceptual and motor tasks to examine whether perceptual or motor experience with the illusory visual target would influence the subsequent perceived and effective ID in discrete and continuous tapping tasks...
December 29, 2016: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28030960/why-female-sex-workers-participate-in-hiv-research-the-illusion-of-voluntariness
#19
Elizabeth Reed, Celia B Fisher, Kim M Blankenship, Brooke S West, Kaveh Khoshnood
The purpose of this study was to examine factors influencing the motivation for and perceived voluntariness of participation in non-intervention HIV research among female sex workers (FSW) in India. FSW (n = 30) who participated in non-intervention HIV studies in the previous three years were recruited from a local community-based organization. Semi-structured qualitative interviews focused on women's personal and economic motivations for participation and their perceptions of the informed consent process...
December 28, 2016: AIDS Care
https://www.readbyqxmd.com/read/28024879/dynamic-representations-of-visual-space-for-perception-and-action
#20
REVIEW
W Pieter Medendorp, Anouk J de Brouwer, Jeroen B J Smeets
The division of labor in visual processing between two anatomically relatively separate cortical pathways, a ventral and a dorsal stream, has been hotly debated in the last decades. One influential model is the What & How pathway model, suggesting that the separation is along ventral perception versus dorsal action, although the degree of functional separation between the two streams is controversial. An implication of this model is that perception and memory-guided movements are highly sensitive to visual contextual illusions, whereas visually-guided movements are largely immune to them...
November 30, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
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