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https://www.readbyqxmd.com/read/28809705/effects-of-continuous-kinaesthetic-feedback-based-on-tendon-vibration-on-motor-imagery-bci-performance
#1
M Barsotti, D Leonardis, N Vanello, M Bergamasco, A Frisoli
BACKGROUND AND OBJECTIVES: Feedback plays a crucial role for using Brain Computer Interface (BCI) systems. This study proposes the use of vibration-evoked kinaesthetic illusions as part of a novel multisensory feedback for a Motor Imagery (MI) based BCI and investigates its contributions in terms of BCI performance and electroencephalographic (EEG) correlates. METHODS: Sixteen subjects performed two different right arm MI-BCI sessions: with the visual feedback only and with both visual and vibration-evoked kinaesthetic feedback, conveyed by the stimulation of the biceps brachi tendon...
August 14, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28803877/face-pareidolia-in-the-rhesus-monkey
#2
Jessica Taubert, Susan G Wardle, Molly Flessert, David A Leopold, Leslie G Ungerleider
Face perception in humans and nonhuman primates is rapid and accurate [1-4]. In the human brain, a network of visual-processing regions is specialized for faces [5-7]. Although face processing is a priority of the primate visual system, face detection is not infallible. Face pareidolia is the compelling illusion of perceiving facial features on inanimate objects, such as the illusory face on the surface of the moon. Although face pareidolia is commonly experienced by humans, its presence in other species is unknown...
August 4, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28802934/psychosis-in-parkinson-s-disease
#3
Dominic H Ffytche, Dag Aarsland
Although illusions, hallucinations and delusions did not play a prominent role in James Parkinson's original clinical descriptions, the longitudinal view of disease progression he advocated has important lessons for the study of such symptoms today. A focus on longitudinal progression rather than individual symptoms led to the concept of PD psychosis-a spectrum of positive symptoms in Parkinson's disease. The publication of criteria for PD psychosis in 2007 helped unify the disparate set of symptoms, raising their profile and resulting in a rapid expansion of literature focussing on clinical aspects, mechanisms, and treatment...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28801769/illusory-limb-movements-activate-different-brain-networks-than-imposed-limb-movements-an-ale-meta-analysis
#4
Jeffrey M Kenzie, Ettie Ben-Shabat, Gemma Lamp, Sean P Dukelow, Leeanne M Carey
Proprioceptive information allows us to perform smooth coordinated movements by constantly updating us with knowledge of the position of our limbs in space. How this information is combined and processed to form conscious perceptions of limb position is still relatively unknown. Several functional neuroimaging studies have attempted to tease out the brain areas responsible for proprioceptive processing in the human brain. Yet there still exists some disagreement in the specific brain regions involved. In order to consolidate the current knowledge in the field, we performed a systematic review of the literature and an activation likelihood estimation (ALE) meta-analysis of functional neuroimaging studies of proprioception...
August 11, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28798718/vestibular-modulation-of-sympathetic-nerve-activity-to-muscle-and-skin-in-humans
#5
REVIEW
Elie Hammam, Vaughan G Macefield
We review the existence of vestibulosympathetic reflexes in humans. While several methods to activate the human vestibular apparatus have been used, galvanic vestibular stimulation (GVS) is a means of selectively modulating vestibular afferent activity via electrodes over the mastoid processes, causing robust vestibular illusions of side-to-side movement. Sinusoidal GVS (sGVS) causes partial entrainment of sympathetic outflow to muscle and skin. Modulation of muscle sympathetic nerve activity (MSNA) from vestibular inputs competes with baroreceptor inputs, with stronger temporal coupling to the vestibular stimulus being observed at frequencies remote from the cardiac frequency; "super entrainment" was observed in some individuals...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28792094/audiovisual-integration-as-conflict-resolution-the-conflict-of-the-mcgurk-illusion
#6
Luis Morís Fernández, Emiliano Macaluso, Salvador Soto-Faraco
There are two main behavioral expressions of multisensory integration (MSI) in speech; the perceptual enhancement produced by the sight of the congruent lip movements of the speaker, and the illusory sound perceived when a speech syllable is dubbed with incongruent lip movements, in the McGurk effect. These two models have been used very often to study MSI. Here, we contend that, unlike congruent audiovisually (AV) speech, the McGurk effect involves brain areas related to conflict detection and resolution. To test this hypothesis, we used fMRI to measure blood oxygen level dependent responses to AV speech syllables...
August 9, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28790906/neurophysiological-correlates-of-the-rubber-hand-illusion-in-late-evoked-and-alpha-beta-band-activity
#7
Isa S Rao, Christoph Kayser
The rubber hand illusion (RHI) allows insights into how the brain resolves conflicting multisensory information regarding body position and ownership. Previous neuroimaging studies have reported a variety of neurophysiological correlates of illusory hand ownership, with conflicting results likely originating from differences in experimental parameters and control conditions. Here, we overcome these limitations by using a fully automated and precisely-timed visuo-tactile stimulation setup to record evoked responses and oscillatory responses in participants who felt the RHI...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28790424/three-dimensional-illusion-thermal-device-for-location-camouflage
#8
Jing Wang, Yanqiang Bi, Quanwen Hou
Thermal metamaterials, proposed in recent years, provide a new method to manipulate the energy flux in heat transfer, and result in many novel thermal devices. In this paper, an illusion thermal device for location camouflage in 3-dimensional heat conduction regime is proposed based on the transformation thermodynamics. The heat source covered by the device produces a fake signal outside the device, which makes the source look like appearing at another position away from its real position. The parameters required by the device are deduced and the method is validated by simulations...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28789923/geographical-accessibility-to-community-pharmacies-by-the-elderly-in-metropolitan-lisbon
#9
Miguel Padeiro
BACKGROUND: In ageing societies, community pharmacies play an important role in delivering medicines, responsible advising, and other targeted services. Elderly people are among their main consumers, as they use more prescription drugs, need more specific health care, and experience more mobility issues than other age groups. This makes geographical accessibility a relevant concern for them. OBJECTIVES: To measure geographical pedestrian accessibility to community pharmacies by elderly people in the Lisbon Metropolitan Area (LMA)...
August 2, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/28783491/adaptation-of-postural-recovery-responses-to-a-vestibular-sensory-illusion-in-individuals-with-parkinson-disease-and-healthy-controls
#10
Mark E Lester, James T Cavanaugh, K Bo Foreman, Scott W Shaffer, Robin Marcus, Leland E Dibble
BACKGROUND: The ability to adapt postural responses to sensory illusions diminishes with age and is further impaired by Parkinson disease. However, limited information exists regarding training-related adaptions of sensory reweighting in these populations. METHODS: This study sought to determine whether Parkinson disease or age would differentially affect acute postural recovery or adaptive postural responses to novel or repeated exposure to sensory illusions using galvanic vestibular stimulation during quiet stance...
July 26, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28780698/multisensory-integration-and-age-dependent-sensitivity-to-body-representation-modification-induced-by-the-rubber-hand-illusion
#11
János Kállai, Péter Kincses, Beatrix Lábadi, Krisztina Dorn, Tibor Szolcsányi, Gergely Darnai, Ernő Hupuczi, József Janszky, Árpád Csathó
The aim of the present study was to compare junior and senior healthy participants for their multimodal integration capability. The instrument used for the investigation was the rubber hand illusion (RHI) where synchronous and asynchronous multimodal stimulation were applied. The study focused on assessing the rate of integration for visuo-tactile and visuo-proprioceptive stimuli. METHODS: From a large sample of right-handed volunteers, 50 senior employees (containing younger and middle age adults) and 51 senior retired (senior adults) participants were recruited...
August 5, 2017: Cognitive Processing
https://www.readbyqxmd.com/read/28780134/initial-validation-of-a-virtual-blood-draw-exposure-paradigm-for-fear-of-blood-and-needles
#12
Z Trost, A Jones, A Guck, T Vervoort, J M Kowalsky, C R France
Fear of blood, injections, and needles commonly prevents or delays individuals' receipt of health care, such as vaccines or blood draws. Innovative methods are needed to overcome these fears and reduce anxiety related to activities of this nature. The present study describes initial testing of an arm illusion paradigm that may prove useful during early phases of graded exposure for people with blood and needle fear. Seventy-four undergraduate students aged 18-29 years were tested. In line with study aims, results indicated that the virtual blood draw paradigm promoted strong perceptions of arm ownership and elicited significant changes in physiological indices (blood pressure, heart rate, electrodermal activity, respiratory rate) in response to key procedure elements (e...
March 16, 2017: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/28777641/source-illusion-devices-for-flexural-lamb-waves-using-elastic-metasurfaces
#13
Yongquan Liu, Zixian Liang, Fu Liu, Owen Diba, Alistair Lamb, Jensen Li
Inspired by recent demonstrations of metasurfaces in achieving reduced versions of electromagnetic cloaks, we propose and experimentally demonstrate source illusion devices to manipulate flexural waves using metasurfaces. The approach is particularly useful for elastic waves due to the lack of form invariance in usual transformation methods. We demonstrate compact and simple-to-implement metasurfaces for shifting, transforming, and splitting a point source. The effects are measured to be broadband and robust against a change of source positions, with agreement from numerical simulations and the Huygens-Fresnel theory...
July 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28777568/positioning-the-water-oxidation-reaction-sites-in-plasmonic-photocatalysts
#14
Shengyang Wang, Yuying Gao, Shu Miao, Taifeng Liu, Linchao Mu, Rengui Li, Fengtao Fan, Can Li
Plasmonic photocatalysis, stemming from the effective light absorbance and confinement of surface plasmons, provides a pathway to enhance solar energy conversion. Although the plasmonic hot electrons in water reduction have been extensively studied, exactly how the plasmonic hot holes participate in the water splitting reaction has not yet been well understood. In particular, where the plasmonic hot holes participate in water oxidation is still illusive. Herein, taking Au/TiO2 as a plasmonic photocatalyst prototype, we investigated the plasmonic hot holes involved in water oxidation...
August 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28769830/spatial-alignment-and-response-hand-in-geometric-and-motion-illusions
#15
Lisa Scocchia, Michela Paroli, Natale A Stucchi, Anna Sedda
Perception of visual illusions is susceptible to manipulation of their spatial properties. Further, illusions can sometimes affect visually guided actions, especially the movement planning phase. Remarkably, visual properties of objects related to actions, such as affordances, can prime more accurate perceptual judgements. In spite of the amount of knowledge available on affordances and on the influence of illusions on actions (or lack of thereof), virtually nothing is known about the reverse: the influence of action-related parameters on the perception of visual illusions...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28768672/an-illusion-of-septic-shock-acute-generalised-exanthematous-pustulosis-with-multiorgan-dysfunction
#16
Manisha Jakkidi, Carine Basmadjian, Satyajeet Roy
Acute generalised exanthematous pustulosis (AGEP) is a rare cutaneous eruption, most often caused by commonly used antibiotics. It is characterised by an acute onset of non-follicular sterile pustular rash and erythema within hours or days of drug exposure and usually resolves spontaneously within 1-2 weeks once the drug is discontinued. Haemodynamic involvement in the form of shock is rare. Here, we present a severe case of AGEP, manifesting with systemic involvement and haemodynamic instability resulting in shock with multiorgan dysfunction...
August 2, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28768538/pulsed-radiofrequency-or-anterior-neurectomy-for-anterior-cutaneous-nerve-entrapment-syndrome-acnes-the-pulse-trial-study-protocol-of-a-randomized-controlled-trial
#17
Robbert C Maatman, Monique A H Steegers, Oliver B A Boelens, Toine C Lim, Hans J van den Berg, Sandra A S van den Heuvel, Marc R M Scheltinga, Rudi M H Roumen
BACKGROUND: Some patients with chronic abdominal pain suffer from an anterior cutaneous nerve entrapment syndrome (ACNES). This somewhat illusive syndrome is thought to be caused by the entrapment of end branches of the intercostal nerves residing in the abdominal wall. If ACNES is suspected, a local injection of an anesthetic agent may offer relief. If pain is recurrent following multiple-injection therapy, an anterior neurectomy entailing removal of the entrapped nerve endings may be considered...
August 2, 2017: Trials
https://www.readbyqxmd.com/read/28766185/when-your-mind-skips-what-your-eyes-fixate-how-forced-fixations-lead-to-comprehension-illusions-in-reading
#18
Elizabeth R Schotter, Mallorie Leinenger, Titus von der Malsburg
The phenomenon of forced fixations suggests that readers sometimes fixate a word (due to oculomotor constraints) even though they intended to skip it (due to parafoveal cognitive-linguistic processing). We investigate whether this leads readers to look directly at a word but not pay attention to it. We used a gaze-contingent boundary paradigm to dissociate parafoveal and foveal information (e.g., the word phone changed to scarf once the reader's eyes moved to it) and asked questions about the sentence to determine which one the reader encoded...
August 1, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28763527/speed-size-illusion-correlates-with-retinal-level-motion-statistics
#19
Zixin Yong, Po-Jang Hsieh
It is a common perceptual experience that smaller objects appear to move faster than larger ones when their physical speeds are the same in either the laboratory or daily life. In this study, we show that the speed-size illusion is correlated with retinal image speed distribution bias. The illusion was quantified with a two-alternative, forced choice speed comparison paradigm, and retinal image speed distributions for different image sizes were obtained by simulation. Simulation results show that smaller retinal images tend to have slower projected speed, and the retinal image speed distribution bias correlates with the strength of the speed-size illusion...
August 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28762957/integrating-three-dimensional-printing-and-nanotechnology-for-musculoskeletal-regeneration
#20
Margaret Nowicki, Nathan Castro, Raj Rao, Michael Plesniak, Lijie Grace Zhang
The field of tissue engineering is advancing steadily, partly due to advancements in rapid prototyping technology. Even with increasing focus, successful complex tissue regeneration of vascularized bone, cartilage and the osteochondral interface remains largely illusive. This review examines current three-dimensional (3D) bioprinting techniques and their application towards bone, cartilage and osteochondral regeneration. The importance of, and benefit to, nanomaterial integration is also highlighted with recent published examples...
August 1, 2017: Nanotechnology
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