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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/28325532/effectiveness-of-binaural-beats-in-reducing-preoperative-dental-anxiety
#3
B K Isik, A Esen, B Büyükerkmen, A Kilinç, D Menziletoglu
Binaural beats are an auditory illusion perceived when two different pure-tone sine waves are presented one to each ear at a steady intensity and frequency. We evaluated their effectiveness in reducing preoperative anxiety in dentistry. Sixty patients (30 in each group) who were to have impacted third molars removed were studied (experimental group: 20 women and 10 men, mean (range) age 24 (18-35) years, and control group: 22 women and 8 men, mean (range) age 28 (15-47) years). All patients were fully informed about the operation preoperatively, and their anxiety recorded on a visual analogue scale (VAS)...
March 18, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28324985/a-novel-thermal-tactile-stimulator-device-for-quantitative-sensory-testing
#4
Umit Kursun, Olcay Kursun, Oleg V Favorov
This paper outlines the design and preliminary experimental results of a novel thermal stimulator device designed to measure, from some perspectives, brain health. The device delivers some thermal stimuli and asks the subject about his perception about them, thus checking the correctness of the perception and even the existence of certain perceptual illusions that would normally be present in healthy cortex and nervous system. This noninvasive sensory technology is cheap and easy to use, it has the potential to be used in telemonitoring systems and in empowering the individual to track his/her progression over time on the provided neuropathy tests...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323018/modulation-of-auditory-percepts-by-transcutaneous-electrical-stimulation
#5
Margarete Anna Ueberfuhr, Amalia Braun, Lutz Wiegrebe, Benedikt Grothe, Markus Drexl
Transcutaneous, electrical stimulation with electrodes placed on the mastoid processes represents a specific way to elicit vestibular reflexes in humans without active or passive subject movements, for which the term galvanic vestibular stimulation was coined. It has been suggested that galvanic vestibular stimulation mainly affects the vestibular periphery, but whether vestibular hair cells, vestibular afferents, or a combination of both are excited, is still a matter of debate. Galvanic vestibular stimulation has been in use since the late 18(th) century, but despite the long-known and well-documented effects on the vestibular system, reports of the effect of electrical stimulation on the adjacent cochlea or the ascending auditory pathway are surprisingly sparse...
March 17, 2017: Hearing Research
https://www.readbyqxmd.com/read/28322427/the-neuronal-correlates-of-mirror-illusion-in-children-with-spastic-hemiparesis-a-study-with-functional-magnetic-resonance-imaging
#6
Christian Weisstanner, Stefanie Saxer, Roland Wiest, Alain Kaelin-Lang, Christopher J Newman, Maja Steinlin, Sebastian Grunt
AIM: To investigate the neuronal activation pattern underlying the effects of mirror illusion in children/adolescents with normal motor development and in children/adolescents with hemiparesis and preserved contralateral corticospinal organisation. METHOD: The type of cortical reorganisation was classified according to results of transcranial magnetic stimulation. Only subjects with congenital lesions and physiological contralateral cortical reorganisation were included...
March 21, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28320677/intermanual-apparent-tactile-motion-and-its-extension-to-3d-interactions
#7
Siyan Zhao, Ali Israr, Micah Fenner, Roberta Klatzky
Information provided by sensory systems is inherently ambiguous as to its source in the physical world. To arrive at a coherent representation, perception deploys heuristic rules and multimodal input, which potentially produce errors such as illusions. The current work uses these effects to create apparent tactile motion and illusory depth motion using sparse vibrotactile stimulation across the hands. Experiment 1 showed the effects of vibrotactile duration and temporal separation between the hands on the quality of perceived illusory linear motion...
March 13, 2017: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28319685/linking-actions-and-objects-context-specific-learning-of-novel-weight-priors
#8
Kevin M Trewartha, J Randall Flanagan
Distinct explicit and implicit memory processes support weight predictions used when lifting objects and making perceptual judgments about weight, respectively. The first time that an object is encountered weight is predicted on the basis of learned associations, or priors, linking size and material to weight. A fundamental question is whether the brain maintains a single, global representation of priors, or multiple representations that can be updated in a context specific way. A second key question is whether the updating of priors, or the ability to scale lifting forces when repeatedly lifting unusually weighted objects requires focused attention...
March 17, 2017: Cognition
https://www.readbyqxmd.com/read/28318492/-brain-tumor-immunotherapy-illusion-or-hope
#9
REVIEW
Denis Migliorini, Valérie Dutoit, Paul R Walker, Pierre-Yves Dietrich
Immunotherapy has proven efficient for many tumors and is now part of standard of care in many indications. What is the picture for brain tumors? The recent development of anti-CTLA-4 and PD1 immune checkpoint inhibitors, which have the ability to restore T lymphocytes activity, has gathered enthusiasm and is now paving the way towards more complex models of immune system manipulation. These models include, among others, vaccination and adoptive T cell transfer technologies. Complementary to those strategies, molecules capable of reshaping the immune tumor microenvironment are currently being investigated in early phase trials...
March 16, 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/28318305/on-demand-driver-vigilance-enhancement-without-explicit-drowsiness-detection-further-analysis-of-the-pilot-study-results
#10
R Michael Van Auken, Brad K Hagoski, Dean P Chiang, Shane Chang
OBJECTIVE: A new active safety concept that engages the driver's psychosensory pain-processing mechanism to automatically trigger vigilance enhancement on-demand was proposed in Chang ( 2012 ). This concept is based on the hypothesis that a human's pain threshold will decline as he/she becomes drowsy, consequently triggering the vigilance enhancer. The objective of this pilot study was to develop methods to test this hypothesis, the results of which could lead to further refinement of the hypothesis and methods, with the ultimate goal of developing new active safety concepts that exploit the driver's endogenous psychosensory pain-processing mechanisms...
March 20, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28315846/risk-factors-for-early-psychosis-in-pd-insights-from-the-parkinson-s-progression-markers-initiative
#11
Dominic H Ffytche, Joana B Pereira, Clive Ballard, K Ray Chaudhuri, Daniel Weintraub, Dag Aarsland
BACKGROUND: Parkinson's Disease (PD) psychosis refers to the spectrum of illusions, formed hallucinations and delusions that occur in PD. Visual hallucinations and illusions are thought to be caused by specific cognitive and higher visual function deficits and patients who develop such symptoms early in the disease course have greater rates of cognitive decline and progression to dementia. To date, no studies have investigated whether such deficits are found prior to the onset of PD psychosis...
April 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28315204/connectedness-underlies-the-underestimation-of-the-horizontal-vertical-illusion-in-l-shaped-configurations
#12
Yongchun Cai, Ci Wang, Chao Song, Zhi Li
L-shaped configuration is a commonly used stimulus configuration in studying horizontal vertical illusion. Here, we report that the horizontal vertical illusion is substantially underestimated when the L-shaped configuration is used for evaluating the illusion. Experiment 1 found that, in a length perception task, the perceived length of a vertical bar was about 10% longer than that of a horizontal bar with the same physical size. Similar amount of HVI was found in a length comparison task, in which the length of a horizontal bar was compared to that of a vertical bar and the two bars were presented separately in space or in time...
March 17, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28314184/how-does-the-body-representation-system-develop-in-the-human-brain
#13
Aurelie Fontan, Fabien Cignetti, Bruno Nazarian, Jean-Luc Anton, Marianne Vaugoyeau, Christine Assaiante
Exploration of the body representation system (BRS) from kinaesthetic illusions in fMRI has revealed a complex network composed of sensorimotor and frontoparietal components. Here, we evaluated the degree of maturity of this network in children aged 7-11 years, and the extent to which structural factors account for network differences with adults. Brain activation following tendon vibration at 100Hz ('illusion') and 30Hz ('no illusion') were analysed using the two-stage random effects model, with or without white and grey matter covariates...
February 28, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28314086/risk-perception-and-disaster-preparedness-in-immigrants-and-canadian-born-adults-analysis-of-a-national-survey-on-similarities-and-differences
#14
An Gie Yong, Louise Lemyre, Celine Pinsent, Daniel Krewski
Research has documented that immigrants tend to experience more negative consequences from natural disasters compared to native-born individuals, although research on how immigrants perceive and respond to natural disaster risks is sparse. We investigated how risk perception and disaster preparedness for natural disasters in immigrants compared to Canadian-born individuals as justifications for culturally-adapted risk communication and management. To this end, we analyzed the ratings on natural disaster risk perception beliefs and preparedness behaviors from a nationally representative survey (N = 1,089)...
March 17, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28306364/white-orbital-mass-after-enucleation-for-retinoblastoma-the-power-of-illusion
#15
Sameh E Soliman, William Halliday, Furqan Shaikh, Helen Chan, Elise Hèon, Brenda L Gallie
No abstract text is available yet for this article.
March 17, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28299410/the-power-law-of-movement-an-example-of-a-behavioral-illusion
#16
Richard S Marken, Dennis M Shaffer
The curved movements produced by living organisms follow a power law where the velocity of movement is a power function of the degree of curvature through which the movement is made. The exponent of the power function is close to either 1/3 or 2/3 depending on how velocity and curvature are measured. This power law is thought to reflect biological and/or kinematic constraints on how organisms produce movements. The present paper shows that the power law is actually a statistical artifact that results from mistaking a correlational for a causal relationship between variables...
March 15, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28299409/nothing-magical-pantomimed-grasping-is-controlled-by-the-ventral-system
#17
Thijs Rinsma, John van der Kamp, Matt Dicks, Rouwen Cañal-Bruland
In a recent amendment to the two-visual-system model, it has been proposed that actions must result in tactile contact with the goal object for the dorsal system to become engaged (Whitwell et al., Neuropsychologia 55:41-50, 2014). The present study tested this addition by assessing the use of allocentric information in normal and pantomime actions. To this end, magicians, and participants who were inexperienced in performing pantomime actions made normal and pantomime grasps toward objects embedded in the Müller-Lyer illusion...
March 15, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28294069/wallet-neuritis-an-example-of-peripheral-sensitization
#18
Md Abu Bakar Siddiq, Israt Jahan, Sam Masihuzzaman
BACKGROUND: Wallet neuritis is an example of extra-spinal tunnel neuropathy concerning sciatic nerve. Its clinical appearance often gets confused with sciatica of lumbar spine origin. Wallet-induced chronic sciatic nerve constriction produces gluteal and ipsilateral lower extremity pain, tingling, and burning sensation. It was Lutz, first describing credit-card wallet sciatica in an Attorney, surfaced on Journal of American Medical Association (JAMA), 1978; however, the condition has not been well-studied in various other occupations...
March 9, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28293693/changing-hands-persistent-alterations-to-body-image-following-brief-exposure-to-multisensory-distortions
#19
A Treshi-Marie Perera, Roger Newport, Kirsten J McKenzie
The dynamic flexibility of body representation has been highlighted through numerous lines of research that range from clinical studies reporting disorders of body ownership, to experimentally induced somatic illusions that have provided evidence for the embodiment of manipulated representations and even fake limbs. While most studies have reported that enlargement of body parts alters somatic perception, and that these can be more readily embodied, shrunken body parts have not been found to consistently alter somatic experiences, perhaps due to reduced feelings of ownership over smaller body parts...
March 14, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28290533/bidirectional-shifting-effects-of-the-sound-intensity-on-the-best-frequency-in-the-rat-auditory-cortex
#20
Can Tao, Guangwei Zhang, Chang Zhou, Lijuan Wang, Sumei Yan, Yi Zhou, Ying Xiong
Frequency and intensity are two independent attributes of sound stimuli. Psychoacoustic studies have found that the sound intensity can affect the perception of frequency; however, the underlying neuronal mechanism remains largely unknown. To investigate if and how the sound level affects the frequency coding for auditory cortical neurons, we recorded the activities of neuronal ensembles and single neurons, as well as the synaptic input evoked by pure tones of different frequency and intensity combinations, in layer 4 of the rat primary auditory cortex...
March 14, 2017: Scientific Reports
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