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https://www.readbyqxmd.com/read/27933418/temporal-characteristics-of-eeg-microstates-mediate-trial-by-trial-risk-taking
#1
Andreas Pedroni, Lorena R R Gianotti, Thomas Koenig, Dietrich Lehmann, Pascal Faber, Daria Knoch
People seem to have difficulties when perceiving events whose outcome has no influence on the outcome of future events. This illusion that patterns exist where there are none may lead to adverse consequences, such as escalating losses in financial trading or gambling debt. Despite the enormous social consequences of these cognitive biases, however, their neural underpinnings are poorly understood. Attempts to investigate them have so far relied on evoked neural activity, whereas spontaneous brain activity has been treated as noise to be averaged out...
December 8, 2016: Brain Topography
https://www.readbyqxmd.com/read/27909466/illusory-temporal-binding-in-meditators
#2
Peter Lush, Jim Parkinson, Zoltan Dienes
We investigate conditions in which more accurate metacognition may lead to greater susceptibility to illusion and thus conditions under which mindfulness meditation may lead to less accurate perceptions. Specifically, greater awareness of intentions may lead to an illusory compression of time between a voluntary action and its outcome ("intentional binding"). Here, we report that experienced Buddhist mindfulness meditators rather than non-meditators display a greater illusory shift of the timing of an outcome toward an intentional action...
2016: Mindfulness
https://www.readbyqxmd.com/read/27900674/serotonergic-hallucinogen-induced-visual-perceptual-alterations
#3
Michael Kometer, Franz X Vollenweider
Serotonergic hallucinogens, such as lysergic acid diethylamide (LSD), psilocybin, and N,N-dimethyltryptamine (DMT), are famous for their capacity to temporally and profoundly alter an individual's visual experiences. These visual alterations show consistent attributes despite large inter- and intra-individual variances. Many reports document a common perception of colors as more saturated, with increased brightness and contrast in the environment ("Visual Intensifications"). Environmental objects might be altered in size ("Visual illusions") or take on a modified and special meaning for the subject ("Altered self-reference")...
November 30, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/27821580/self-grounded-vision-hand-ownership-modulates-visual-location-through-cortical-beta-and-gamma-oscillations
#4
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/27803971/temporal-and-spectral-audiotactile-interactions-in-musicians
#5
Simon P Landry, Andréanne Sharp, Sara Pagé, François Champoux
Previous investigations have revealed that the complex sensory exposure of musical training alters audiovisual interactions. As of yet, there has been little evidence on the effects of musical training on audiotactile interactions at a behavioural level. Here, we tested audiotactile interaction in musicians using the audiotactile illusory flash and the parchment-skin illusion. Significant differences were only found between musicians and non-musicians for the audiotactile illusory flash. Both groups had similar task-relevant unisensory abilities, but unlike non-musicians, the number of auditory stimulations did not have a statistically important influence on the number of perceived tactile stimulations for musicians...
November 1, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27702884/retino-cortical-stimulus-frequency-dependent-gamma-coupling-evidence-and-functional-implications-of-oscillatory-potentials
#6
Mihail I Todorov, Katalin A Kékesi, Zsolt Borhegyi, Robert Galambos, Gábor Juhász, Anthony G Hudetz
Long-range gamma band EEG oscillations mediate information transmission between distant brain regions. Gamma band-based coupling may not be restricted to cortex-to-cortex communication but may include extracortical parts of the visual system. The retinogram and visual event-related evoked potentials exhibit time-locked, forward propagating oscillations that are candidates of gamma oscillatory coupling between the retina and the visual cortex. In this study, we tested if this gamma coupling is present as indicated by the coherence of gamma-range (70-200 Hz) oscillatory potentials (OPs) recorded simultaneously from the retina and the primary visual cortex in freely moving, adult rats...
October 2016: Physiological Reports
https://www.readbyqxmd.com/read/27686250/dual-processing-of-visual-rotation-for-bipedal-stance-control
#7
Brian L Day, Timothy Muller, Joanna Offord, Irene Di Giulio
KEY POINTS: When standing, the gain of the body-movement response to a sinusoidally moving visual scene has been shown to get smaller with faster stimuli, possibly through changes in the apportioning of visual flow to self-motion or environment motion. We investigated whether visual-flow speed similarly influences the postural response to a discrete, unidirectional rotation of the visual scene in the frontal plane. Contrary to expectation, the evoked postural response consisted of two sequential components with opposite relationships to visual motion speed...
October 1, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27648177/temporal-plus-epilepsy-anatomo-electroclinical-subtypes
#8
René Andrade-Machado, Vanessa Benjumea-Cuartas
Background: Mesial temporal lobe epilepsy (TLE) is a remediable epileptic syndrome. About 40% of patients continue to have seizures after standard temporal lobectomy. It has been suggested that some of these patients could actually suffer from a more complex epileptogenic network. Because a few papers have been dedicated to this topic, we decided to write an article updating this theme. Methods: We performed a literature search using the following terminology: "temporal plus epilepsy and networks," "temporal plus epilepsy," "orbito-temporal epilepsy," "temporo-insular epilepsy," "temporo-parieto-occipital (TPO) epilepsy," "parieto-temporal epilepsy," "intracortical evoked potential and temporal plus epilepsy," "temporal lobe connectivity and epilepsy," "intracortical evoked potential and epilepsy surgery," "role of extratemporal structures in TLE," "surgical failure after temporal lobectomy," "Diffusion tensor imaging (DTI) and temporal epilepsy," and "positron emission tomography (PET) in temporal plus lobe epilepsy" in the existing PubMed databases...
July 6, 2016: Iranian Journal of Neurology
https://www.readbyqxmd.com/read/27620801/causal-dynamics-of-scalp-electroencephalography-oscillation-during-the-rubber-hand-illusion
#9
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...
September 12, 2016: Brain Topography
https://www.readbyqxmd.com/read/27592410/temporal-limits-on-rubber-hand-illusion-reflect-individuals-temporal-resolution-in-multisensory-perception
#10
Marcello Costantini, Jeffrey Robinson, Daniele Migliorati, Brunella Donno, Francesca Ferri, Georg Northoff
Synchronous, but not asynchronous, multisensory stimulation has been successfully employed to manipulate the experience of body ownership, as in the case of the rubber hand illusion. Hence, it has been assumed that the rubber hand illusion is bound by the same temporal rules as in multisensory integration. However, empirical evidence of a direct link between the temporal limits on the rubber hand illusion and those on multisensory integration is still lacking. Here we provide the first comprehensive evidence that individual susceptibility to the rubber hand illusion depends upon the individual temporal resolution in multisensory perception, as indexed by the temporal binding window...
December 2016: Cognition
https://www.readbyqxmd.com/read/27591367/crossmodal-binding-rivalry-a-race-for-integration-between-unequal-sensory-inputs
#11
Maria Kostaki, Argiro Vatakis
Exposure to multiple but unequal (in number) sensory inputs often leads to illusory percepts, which may be the product of a conflict between those inputs. To test this conflict, we utilized the classic sound induced visual fission and fusion illusions under various temporal configurations and timing presentations. This conflict between unequal numbers of sensory inputs (i.e., crossmodal binding rivalry) depends on the binding of the first audiovisual pair and its temporal proximity to the upcoming unisensory stimulus...
October 2016: Vision Research
https://www.readbyqxmd.com/read/27535373/masking-reduces-orientation-selectivity-in-rat-visual-cortex
#12
Dasuni S Alwis, Katrina L Richards, Nicholas S C Price
In visual masking the perception of a target stimulus is impaired by a preceding (forward) or succeeding (backward) mask stimulus. The illusion is of interest because it allows uncoupling of the physical stimulus, its neuronal representation, and its perception. To understand the neuronal correlates of masking, we examined how masks affected the neuronal responses to oriented target stimuli in the primary visual cortex (V1) of anesthetized rats (n = 37). Target stimuli were circular gratings with 12 orientations; mask stimuli were plaids created as a binarized sum of all possible target orientations...
November 1, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27485049/the-sense-of-body-ownership-relaxes-temporal-constraints-for-multisensory-integration
#13
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/27454579/-robot-hand-illusion-under-delayed-visual-feedback-relationship-between-the-senses-of-ownership-and-agency
#14
Mohamad Arif Fahmi Ismail, Sotaro Shimada
The rubber hand illusion (RHI) is an illusion of the self-ownership of a rubber hand that is touched synchronously with one's own hand. While the RHI relates to visual and tactile integration, we can also consider a similar illusion with visual and motor integration on a fake hand. We call this a "robot hand illusion" (RoHI), which relates to both the senses of ownership and agency. Here we investigate the effect of delayed visual feedback on the RoHI. Participants viewed a virtual computer graphic hand controlled by their hand movement recorded using a data glove device...
2016: PloS One
https://www.readbyqxmd.com/read/27378895/bodily-experience-in-schizophrenia-factors-underlying-a-disturbed-sense-of-body-ownership
#15
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
https://www.readbyqxmd.com/read/27375441/periodic-visuotactile-stimulation-slowly-enhances-the-rubber-hand-illusion-in-individuals-with-high-autistic-traits
#16
Masakazu Ide, Makoto Wada
In a rubber hand illusion (RHI) task, synchronous brush stroking of a rubber hand and a participant's hidden hand induces body ownership of the rubber hand. The effects of spatial distances and temporal lags on the RHI have been extensively examined; however, the effect of periodicity of the stimuli on illusory body ownership has not been examined. Meanwhile, the occurrence of RHI tends to be weak in individuals with autism-spectrum disorders (ASD) and high autistic traits. Preference for stimulus having regularity of tempo is generally observed in individuals with ASD, and thus, periodic stimulation might be more effective to elicit the body ownership illusion in individuals with high autistic traits...
2016: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/27334887/musicians-have-enhanced-audiovisual-multisensory-binding-experience-dependent-effects-in-the-double-flash-illusion
#17
Gavin M Bidelman
Musical training is associated with behavioral and neurophysiological enhancements in auditory processing for both musical and nonmusical sounds (e.g., speech). Yet, whether the benefits of musicianship extend beyond enhancements to auditory-specific skills and impact multisensory (e.g., audiovisual) processing has yet to be fully validated. Here, we investigated multisensory integration of auditory and visual information in musicians and nonmusicians using a double-flash illusion, whereby the presentation of multiple auditory stimuli (beeps) concurrent with a single visual object (flash) induces an illusory perception of multiple flashes...
October 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27324803/temporal-integration-of-multisensory-stimuli-in-autism-spectrum-disorder-a-predictive-coding-perspective
#18
REVIEW
Jason S Chan, Anne Langer, Jochen Kaiser
Recently, a growing number of studies have examined the role of multisensory temporal integration in people with autism spectrum disorder (ASD). Some studies have used temporal order judgments or simultaneity judgments to examine the temporal binding window, while others have employed multisensory illusions, such as the sound-induced flash illusion (SiFi). The SiFi is an illusion created by presenting two beeps along with one flash. Participants perceive two flashes if the stimulus-onset asynchrony (SOA) between the two flashes is brief...
August 2016: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27302746/arm-crossing-updates-brain-functional-connectivity-of-the-left-posterior-parietal-cortex
#19
Hiroki Ora, Makoto Wada, David Salat, Kenji Kansaku
The unusual configuration of body parts can cause illusions. For example, when tactile stimuli are delivered to crossed arms a reversal of subjective temporal ordering occurs. Our group has previously demonstrated that arm crossing without sensory stimuli causes activity changes in the left posterior parietal cortex (PPC) and an assessment of tactile temporal order judgments (TOJs) revealed a positive association between activity in this area, especially the left intraparietal sulcus (IPS), and the degree of the crossed-hand illusion...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27292114/neural-correlates-of-auditory-scale-illusion
#20
Shinya Kuriki, Ryousuke Numao, Iku Nemoto
The auditory illusory perception "scale illusion" occurs when ascending and descending musical scale tones are delivered in a dichotic manner, such that the higher or lower tone at each instant is presented alternately to the right and left ears. Resulting tone sequences have a zigzag pitch in one ear and the reversed (zagzig) pitch in the other ear. Most listeners hear illusory smooth pitch sequences of up-down and down-up streams in the two ears separated in higher and lower halves of the scale. Although many behavioral studies have been conducted, how and where in the brain the illusory percept is formed have not been elucidated...
September 2016: Hearing Research
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