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https://www.readbyqxmd.com/read/28821753/dynamic-reconfiguration-of-cortical-functional-connectivity-across-brain-states
#1
Iain Stitt, Karl J Hollensteiner, Edgar Galindo-Leon, Florian Pieper, Eva Fiedler, Thomas Stieglitz, Gerhard Engler, Guido Nolte, Andreas K Engel
Throughout each day, the brain displays transient changes in state, as evidenced by shifts in behavior and vigilance. While the electrophysiological correlates of brain states have been studied for some time, it remains unclear how large-scale cortico-cortical functional connectivity systematically reconfigures across states. Here, we investigate state-dependent shifts in cortical functional connectivity by recording local field potentials (LFPs) during spontaneous behavioral transitions in the ferret using chronically implanted micro-electrocorticographic (µECoG) arrays positioned over occipital, parietal, and temporal cortical regions...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28816473/the-effects-of-context-on-processing-words-during-sentence-reading-among-adults-varying-in-age-and-literacy-skill
#2
Allison A Steen-Baker, Shukhan Ng, Brennan R Payne, Carolyn J Anderson, Kara D Federmeier, Elizabeth A L Stine-Morrow
The facilitation of word processing by sentence context reflects the interaction between the build-up of message-level semantics and lexical processing. Yet, little is known about how this effect varies through adulthood as a function of reading skill. In this study, Participants 18-64 years old with a range of literacy competence read simple sentences as their eye movements were monitored. We manipulated the predictability of a sentence-final target word, operationalized as cloze probability. First fixation durations showed an interaction between age and literacy skill, decreasing with age among more skilled readers but increasing among less skilled readers...
August 2017: Psychology and Aging
https://www.readbyqxmd.com/read/28813944/robotic-set-up-to-quantify-hand-eye-behavior-in-motor-execution-and-learning-of-children-with-autism-spectrum-disorder
#3
Claudia Casellato, Marta Gandolla, Alessandro Crippa, Alessandra Pedrocchi
Autism spectrum disorder (ASD) is a multifaceted neurodevelopmental disorder characterized by a persistence of social and communication impairment, and restricted and repetitive behaviors. However, motor disorders have also been described, but not objectively assessed. Most studies showed inefficient eye-hand coordination and motor learning in children with ASD; in other experiments, mechanisms of acquisition of internal models in self-generated movements appeared to be normal in autism. In this framework, we have developed a robotic protocol, recording gaze and hand data during upper limb tasks, in which a haptic pen-like handle is moved along specific trajectories displayed on the screen...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28808217/electromyography-and-fos-immunostaining-study-establish-a-possible-functional-link-between-trigeminal-proprioception-and-the-oculomotor-system-in-rats
#4
Houcheng Liang, Jingdong Zhang, Pifu Luo, Hongna Zhu, Ying Qiao, Anle Su, Ting Zhang
The objective of this study was to explore whether there was a functional link between trigeminal proprioception and the oculomotor system mediated through jaw muscle afferents. Electromyography (EMG) was undertaken of the levator palpebrae (LP) and superior rectus (SR), and Fos expression was detected in the brainstem following consecutive down-stretching of the lower jaw at 2-4 Hz in rats. Retrograde tracing was undertaken of the interstitial nucleus of Cajal and Darkschewitsch nucleus (INC/DN) pre-oculomotor neurons...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28803877/face-pareidolia-in-the-rhesus-monkey
#5
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/28800632/radar-a-novel-fast-screening-method-for-reading-difficulties-with-special-focus-on-dyslexia
#6
Ioannis Smyrnakis, Vassilios Andreadakis, Vassilios Selimis, Michail Kalaitzakis, Theodora Bachourou, Georgios Kaloutsakis, George D Kymionis, Stelios Smirnakis, Ioannis M Aslanides
Dyslexia is a developmental learning disorder of single word reading accuracy and/or fluency, with compelling research directed towards understanding the contributions of the visual system. While dyslexia is not an oculomotor disease, readers with dyslexia have shown different eye movements than typically developing students during text reading. Readers with dyslexia exhibit longer and more frequent fixations, shorter saccade lengths, more backward refixations than typical readers. Furthermore, readers with dyslexia are known to have difficulty in reading long words, lower skipping rate of short words, and high gaze duration on many words...
2017: PloS One
https://www.readbyqxmd.com/read/28793152/identification-of-characters-and-localization-of-images-using-direct-multiple-electrode-stimulation-with-a-suprachoroidal-retinal-prosthesis
#7
Mohit N Shivdasani, Nicholas C Sinclair, Lisa N Gillespie, Matthew A Petoe, Samuel A Titchener, James B Fallon, Thushara Perera, Darien Pardinas-Diaz, Nick M Barnes, Peter J Blamey
Purpose: Retinal prostheses provide vision to blind patients by eliciting phosphenes through electrical stimulation. This study explored whether character identification and image localization could be achieved through direct multiple-electrode stimulation with a suprachoroidal retinal prosthesis. Methods: Two of three retinitis pigmentosa patients implanted with a suprachoroidal electrode array were tested on three psychophysical tasks. Electrode patterns were stimulated to elicit perception of simple characters, following which percept localization was tested using either static or dynamic images...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28782870/rapid-eye-movement-sleep-behaviour-disorder-and-striatal-dopamine-depletion-in-patients-with-parkinson-s-disease
#8
S J Chung, Y Lee, J J Lee, P H Lee, Y H Sohn
BACKGROUND AND PURPOSE: Rapid eye movement sleep behaviour disorder (RBD) is related to striatal dopamine depletion. This study was performed to confirm whether clinically probable RBD (cpRBD) in patients with Parkinson's disease (PD) is associated with a specific pattern of striatal dopamine depletion. METHODS: A prospective survey was conducted using the RBD Screening Questionnaire (RBDSQ) in 122 patients with PD who had undergone dopamine transporter (DAT) positron emission tomography scan...
August 7, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28777170/brain-circuitry-controlling-sleep-and-wakefulness
#9
Richard L Horner, John H Peever
PURPOSE OF REVIEW: This article outlines the fundamental brain mechanisms that control sleep-wake patterns and reviews how pathologic changes in these control mechanisms contribute to common sleep disorders. RECENT FINDINGS: Discrete but interconnected clusters of cells located within the brainstem and hypothalamus comprise the circuits that generate wakefulness, non-rapid eye movement (non-REM) sleep, and REM sleep. These clusters of cells use specific neurotransmitters, or collections of neurotransmitters, to inhibit or excite their respective sleep- and wake-promoting target sites...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28775332/temporally-robust-eye-movements-through-task-priming-and-self-referential-stimuli
#10
Eun-Soo Jung, Dong-Gun Lee, Kyeongho Lee, Soo-Young Lee
Studies have demonstrated connections between eye movements and attention shifts. However, little is known about the general factors that contribute to the self-consistency of idiosyncratic scanpaths as a function of attention shifts over time. The present work repeatedly measured human eye movements at various time intervals that ranged from less than one hour to one year between recording sessions. With and without task context, subjects observed multiple images with multiple areas of interest, including their own sporadically interspersed facial images...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28774636/sleep-as-a-new-target-for-improving-outcomes-in-idiopathic-pulmonary-fibrosis-ipf
#11
REVIEW
Charalampos Mermigkis, Izolde Bouloukaki, Sophia E Schiza
Idiopathic pulmonary fibrosis (IPF) represents the most common type of interstitial pneumonias but remains a disease with a poor outcome. In recent years, two drugs (pirfenidone and nintedanib) have shown promising results at stalling disease progression, however, the interplay of sleep disruption or sleep disorders overall and in relation to medication effectiveness remains understudied. In the past, there was limited interest related to the role of sleep in IPF. Treating physicians tended to point only on the daily disabling symptoms disregarding the possible significant role of sleep alterations or co-existing sleep disorders...
July 31, 2017: Chest
https://www.readbyqxmd.com/read/28770465/tracking-the-eye-movement-of-four-years-old-children-learning-chinese-words
#12
Dan Lin, Guangyao Chen, Yingyi Liu, Jiaxin Liu, Jue Pan, Lei Mo
Storybook reading is the major source of literacy exposure for beginning readers. The present study tracked 4-year-old Chinese children's eye movements while they were reading simulated storybook pages. Their eye-movement patterns were examined in relation to their word learning gains. The same reading list, consisting of 20 two-character Chinese words, was used in the pretest, 5-min eye-tracking learning session, and posttest. Additionally, visual spatial skill and phonological awareness were assessed in the pretest as cognitive controls...
August 2, 2017: Journal of Psycholinguistic Research
https://www.readbyqxmd.com/read/28762613/visual-attention-to-ambiguous-emotional-faces-in-eating-disorders-role-of-alexithymia
#13
Esther Fujiwara, Veronica L Kube, Daniel Rochman, Alexander K Macrae-Korobkov, Vanessa Peynenburg
Eating disorders (EDs) are often accompanied by social-emotional problems. Recently, alexithymia has been suggested to explain objective emotion processing deficits in EDs. We tested if elevated levels of alexithymia may explain emotional face-processing problems in a mixed ED group (N = 24, 19 with anorexia and five with bulimia), comparing them with high-alexithymic (N = 25) and low-alexithymic healthy controls (N = 25). Participants judged the mixture ratio of clear and ambiguous facial emotion blends while eye movements were recorded...
August 1, 2017: European Eating Disorders Review: the Journal of the Eating Disorders Association
https://www.readbyqxmd.com/read/28762086/regional-microstructural-damage-and-patterns-of-eye-movement-impairment-a-dti-and-video-oculography-study-in-neurodegenerative-parkinsonian-syndromes
#14
Martin Gorges, Melanie N Maier, Johannes Rosskopf, Olga Vintonyak, Elmar H Pinkhardt, Albert C Ludolph, Hans-Peter Müller, Jan Kassubek
Characteristic alterations of eye movement control are a common feature of neurodegenerative parkinsonism, including Parkinson's disease (PD), progressive supranuclear palsy (PSP), and multiple system atrophy (MSA). Regional microstructural alterations as assessed by diffusion tensor imaging (DTI) have been reported in PD, PSP, and MSA. Therefore, we investigated the specific association between eye movement disturbances and microstructural impairment in these diseases. Video-oculographic recordings of smooth pursuit and visually guided reactive saccades as well as fractional anisotropy (FA) maps computed from whole-brain DTI data were analyzed for 36 PD, 30 PSP, 18 MSA patients, and 23 matched healthy control subjects...
July 31, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28758128/learning-and-treatment-of-anaphylaxis-by-laypeople-a-simulation-study-using-pupilar-technology
#15
Felipe Fernandez-Mendez, Nieves Maria Saez-Gallego, Roberto Barcala-Furelos, Cristian Abelairas-Gomez, Alexis Padron-Cabo, Alexandra Perez-Ferreiros, Carlos Garcia-Magan, Jose Moure-Gonzalez, Onofre Contreras-Jordan, Antonio Rodriguez-Nuñez
An anaphylactic shock is a time-critical emergency situation. The decision-making during emergencies is an important responsibility but difficult to study. Eye-tracking technology allows us to identify visual patterns involved in the decision-making. The aim of this pilot study was to evaluate two training models for the recognition and treatment of anaphylaxis by laypeople, based on expert assessment and eye-tracking technology. A cross-sectional quasi-experimental simulation study was made to evaluate the identification and treatment of anaphylaxis...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28754103/similar-polysomnographic-pattern-in-primary-insomnia-and-major-depression-with-objective-insomnia-a-sign-of-common-pathophysiology
#16
Matthieu Hein, Jean-Pol Lanquart, Gwénolé Loas, Philippe Hubain, Paul Linkowski
BACKGROUND: Our aim is to verify empirically the existence of a major depressed subgroup with a similar polysomnographic pattern as primary insomnia, including at rapid eye movement sleep level. METHODS: The polysomnographic data from 209 untreated individuals (30 normative, 84 primary insomnia sufferers, and 95 major depressed patients with objective insomnia) who were recruited retrospectively from the Erasme hospital database were studied for the whole night and thirds of the night...
July 28, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28745471/visual-control-in-basketball-shooting-under-exertion-conditions
#17
Teresa Zwierko, Marek Popowczak, Jarosław Woźniak, Andrzej Rokita
BACKGROUND: This study examined the effect of physical exertion on gaze behavior during basketball shooting in both stationary and dynamic conditions. METHODS: Thirteen skilled basketball players performed two-point shooting during a 60 second fatigue protocol. Before and after a jump shot test, players performed two free throws. Eye movements were registered using an SMI Mobile EyeTracker. The frequency of all fixation points (number) and fixation duration during the motor phases of shooting were determined using frame-by- frame analysis...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28742873/orienting-towards-social-features-in-naturalistic-scenes-is-reflexive
#18
Lara Rösler, Albert End, Matthias Gamer
Saliency-based models of visual attention postulate that, when a scene is freely viewed, attention is predominantly allocated to those elements that stand out in terms of their physical properties. However, eye-tracking studies have shown that saliency models fail to predict gaze behavior accurately when social information is included in an image. Notably, gaze pattern analyses revealed that depictions of human beings are heavily prioritized independent of their low-level physical saliency. What remains unknown, however, is whether the prioritization of such social features is a reflexive or a voluntary process...
2017: PloS One
https://www.readbyqxmd.com/read/28735929/electrophysiological-and-microstructural-features-of-sleep-in%C3%A2-children%C3%A2-at-high-risk-for-depression-a-preliminary-study
#19
Gianluca Sesso, Flora Bat-Pitault, Aurore Guyon, Sabine Plancoulaine, Tommaso Banfi, Giulia Milioli, Liborio Parrino, Ugo Faraguna, Patricia Franco
OBJECTIVE: This preliminary study investigated electrophysiological and microstructural features of sleep in children and adolescents 4-18 years of age who were born to depressed mothers. METHODS: A total of 31 healthy subjects (15 male and 16 female) participated in the study. In this sample, 20 children born to mothers diagnosed with Major Depressive Disorder (MDD) were designated as "high-risk"; 11 children born to mothers without a personal history of depression were designated as "low-risk...
August 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28724782/dissecting-patterns-of-preparatory-activity-in-the-frontal-eye-fields-during-pursuit-target-selection
#20
Ramanujan T Raghavan, Mati Joshua
We investigated the composition of preparatory activity of frontal eye field (FEF) neurons in monkeys performing a pursuit target selection task. In response to the orthogonal motion of a large and a small reward target, monkeys initiated pursuit biased towards the direction of large reward target motion. FEF neurons exhibited robust preparatory activity preceding movement initiation in this task. Preparatory activity consisted of two components, ramping activity that was constant across target selection conditions and a flat offset in firing rates that signaled the target selection condition...
July 19, 2017: Journal of Neurophysiology
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