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https://www.readbyqxmd.com/read/28528447/a-single-bout-of-endurance-exercise-modulates-eeg-microstates-temporal-features
#1
Jérôme N Spring, Miralena I Tomescu, Jérôme Barral
Electrical neuroimaging is a promising method to explore the spontaneous brain function after physical exercise. The present study aims to investigate the effect of acute physical exercise on the temporal dynamic of the resting brain activity captured by the four conventional map topographies (microstates) described in the literature, and to associate these brain changes with the post-exercise neuromuscular function. Twenty endurance-trained subjects performed a 30-min biking task at 60% of their maximal aerobic power followed by a 10 km all-out time trial...
May 20, 2017: Brain Topography
https://www.readbyqxmd.com/read/28528203/changes-in-resting-state-functional-brain-connectivity-and-withdrawal-symptoms-are-associated-with-acute-electronic-cigarette-use
#2
Andréa L Hobkirk, Travis T Nichols, Jonathan Foulds, Jessica M Yingst, Susan Veldheer, Shari Hrabovsky, John Richie, Thomas Eissenberg, Stephen J Wilson
Resting state functional brain connectivity (rsFC) may be an important neuromarker of smoking behavior. Prior research has shown, among cigarette smokers, that nicotine administration alters rsFC within frontal and parietal cortices involved in executive control, as well as striatal regions that drive reward processing. These changes in rsFC have been associated with reductions in withdrawal symptom severity. We currently have a limited understanding of how rsFC is affected by the use of electronic cigarettes (ecigs), an increasingly popular class of products, the members of which deliver nicotine with varying effectiveness...
May 17, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28527824/clinical-significance-in-nursing-research-a-discussion-and-descriptive-analysis
#3
Denise F Polit
BACKGROUND: It is widely understood that statistical significance should not be equated with clinical significance, but the topic of clinical significance has not received much attention in the nursing literature. By contrast, interest in conceptualizing and operationalizing clinical significance has been a "hot topic" in other health care fields for several decades. OBJECTIVES: The major purpose of this paper is to briefly describe recent advances in defining and quantifying clinical significance...
May 10, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28526574/functional-thalamocortical-connectivity-development-and-alterations-in-preterm-infants-during-the-neonatal-period
#4
Yue Cai, Xiushuang Wu, Zihui Su, Yuan Shi, Jia-Hong Gao
The thalamus is one of the most commonly affected brain regions in preterm infants, particularly in infants with white matter lesions (WML). The aim of this paper is to explore the development and alterations of the functional thalamocortical connectivity in preterm infants with and without punctate white matter lesions (PWMLs) during the period before term equivalent age (TEA). In this study, twenty-two normal preterm infants (NP), twenty-two preterm infants with PWMLs and thirty-one full-term control infants (FT) were enrolled...
May 16, 2017: Neuroscience
https://www.readbyqxmd.com/read/28525754/regulated-intron-removal-integrates-motivational-state-and-experience
#5
Jason Gill, Younshim Park, J P McGinnis, Consuelo Perez-Sanchez, Marco Blanchette, Kausik Si
Myriad experiences produce transient memory, yet, contingent on the internal state of the organism and the saliency of the experience, only some memories persist over time. How experience and internal state influence the duration of memory at the molecular level remains unknown. A self-assembled aggregated state of Drosophila Orb2A protein is required specifically for long-lasting memory. We report that in the adult fly brain the mRNA encoding Orb2A protein exists in an unspliced non-protein-coding form. The convergence of experience and internal drive transiently increases the spliced protein-coding Orb2A mRNA...
May 18, 2017: Cell
https://www.readbyqxmd.com/read/28525320/sexual-and-reproductive-health-priorities-of-adolescent-girls-in-lagos-nigeria-findings-from-free-listing-interviews
#6
Juliet Iwelunmor, Sarah Blackstone, Ucheoma Nwaozuru, Donaldson Conserve, Patricia Iwelunmor, John E Ehiri
Background Adolescent girls in Nigeria experience a disproportionately high burden of sexual and reproductive health disparities that affect their well-being. Yet, little is known about adolescent girls' own unique perspectives of the sexual and reproductive health challenges they face, and possible solutions to these challenges. Aims To explore top sexual and reproductive health concerns of female adolescents in Nigeria and their perceptions regarding potential solutions to these issues. Methods Eighty adolescent girls attending two public secondary schools in Lagos, Nigeria completed individual free-listing interviews...
May 17, 2017: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/28523282/comparative-study-of-computational-visual-attention-models-on-two-dimensional-medical-images
#7
Gezheng Wen, Brenda Rodriguez-Niño, Furkan Y Pecen, David J Vining, Naveen Garg, Mia K Markey
Computational modeling of visual attention is an active area of research. These models have been successfully employed in applications such as robotics. However, most computational models of visual attention are developed in the context of natural scenes, and their role with medical images is not well investigated. As radiologists interpret a large number of clinical images in a limited time, an efficient strategy to deploy their visual attention is necessary. Visual saliency maps, highlighting image regions that differ dramatically from their surroundings, are expected to be predictive of where radiologists fixate their gaze...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28523217/relation-between-patterns-of-intrinsic-network-connectivity-cognitive-functioning-and-symptom-presentation-in-trauma-exposed-patients-with-major-depressive-disorder
#8
Melissa Parlar, Maria Densmore, Geoffrey B Hall, Paul A Frewen, Ruth A Lanius, Margaret C McKinnon
OBJECTIVE: The present study investigated resting fMRI connectivity within the default mode (DMN), salience (SN), and central executive (CEN) networks in relation to neurocognitive performance and symptom severity in trauma-exposed patients with major depressive disorder (MDD). METHOD: Group independent component analysis was conducted among patients with MDD (n = 21), examining DMN, SN, and CEN connectivity in relation to neurocognitive performance and symptom severity...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28522983/a-dynamical-model-of-pitch-memory-provides-an-improved-basis-for-implied-harmony-estimation
#9
Ji Chul Kim
Tonal melody can imply vertical harmony through a sequence of tones. Current methods for automatic chord estimation commonly use chroma-based features extracted from audio signals. However, the implied harmony of unaccompanied melodies can be difficult to estimate on the basis of chroma content in the presence of frequent nonchord tones. Here we present a novel approach to automatic chord estimation based on the human perception of pitch sequences. We use cohesion and inhibition between pitches in auditory short-term memory to differentiate chord tones and nonchord tones in tonal melodies...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28522981/perception-of-leitmotives-in-richard-wagner-s-der-ring-des-nibelungen
#10
David J Baker, Daniel Müllensiefen
The music of Richard Wagner tends to generate very diverse judgments indicative of the complex relationship between listeners and the sophisticated musical structures in Wagner's music. This paper presents findings from two listening experiments using the music from Wagner's Der Ring des Nibelungen that explores musical as well as individual listener parameters to better understand how listeners are able to hear leitmotives, a compositional device closely associated with Wagner's music. Results confirm findings from a previous experiment showing that specific expertise with Wagner's music can account for a greater portion of the variance in an individual's ability to recognize and remember musical material compared to measures of generic musical training...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28521281/functional-connectivity-in-incarcerated-male-adolescents-with-psychopathic-traits
#11
Sandra Thijssen, Kent A Kiehl
The present study examined the association between psychopathic traits and functional connectivity in 177 incarcerated male adolescents. We hypothesized that psychopathic symptoms would be associated with functional connectivity within networks encompassing limbic and paralimbic regions, such as the default mode (DMN), salience networks (SN), and executive control network (ECN). The present sample was drawn from the Southwest Advanced Neuroimaging Cohort, Youth sample, and from research at a youth detention facility in Wisconsin...
May 11, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28515863/structural-segmentation-of-toru-takemitsu-s-piece-itinerant-by-advanced-level-music-graduate-students
#12
Jose A Ordoñana, Ana Laucirica
This work attempts to study the way higher music graduate students segment a contemporary music work, Itinerant, and to understand the influence of musical feature on segmentation. It attempts to test the theory stating that saliences contribute to organising the music surface. The 42 students listened to the work several times and, in real time, they were requested to indicate the places on the score where they perceived structural boundaries. This work is characterised by its linearity, which could hinder identification of saliences and thereby, the establishment of structural boundaries...
May 2017: I-Perception
https://www.readbyqxmd.com/read/28513104/novelty-seeking-and-reward-dependence-related-large-scale-brain-networks-functional-connectivity-variation-during-salience-expectancy
#13
Shijia Li, Liliana Ramona Demenescu, Catherine M Sweeney-Reed, Anna Linda Krause, Coraline D Metzger, Martin Walter
A salience network (SN) anchored in the anterior insula (AI) and dorsal anterior cingulate cortex (dACC) plays a key role in switching between brain networks during salience detection and attention regulation. Previous fMRI studies have associated expectancy behaviors and SN activation with novelty seeking (NS) and reward dependence (RD) personality traits. To address the question of how functional connectivity (FC) in the SN is modulated by internal (expectancy-related) salience assignment and different personality traits, 68 healthy participants performed a salience expectancy task using functional magnetic resonance imaging, and psychophysiological interaction analysis (PPI) was conducted to determine salience-related connectivity changes during these anticipation periods...
May 17, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28506079/the-neural-correlates-of-emotional-lability-in-children-with-asd
#14
Randi Bennett, Krishna Somandapalli, Adriana Di Martino, Amy Roy
OBJECTIVE: Autism spectrum disorder (ASD) is exceptionally heterogeneous in both clinical and physiopathological presentations. Clinical variability applies to ASD-specific symptoms as well as frequent comorbid psychopathology such as emotional lability (EL). To date, the physiopathological underpinnings of the co-occurrence of EL and ASD are unknown. As a first step, we examined within-ASD inter-individual variability of EL and its neuronal correlates using resting-state fMRI (R-fMRI)...
May 15, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28505355/uncovering-the-neuroanatomical-correlates-of-cognitive-affective-and-conative-theory-of-mind-in-pediatric-traumatic-brain-injury-a-neural-systems-perspective
#15
Nicholas P Ryan, Cathy Catroppa, Richard Beare, Timothy J Silk, Stephen J Hearps, Miriam H Beauchamp, Keith Owen Yeates, Vicki A Anderson
Deficits in Theory of Mind (ToM) are common after neurological insult acquired in the first and second decade of life, however the contribution of large-scale neural networks to ToM deficits in children with brain injury is unclear. Using pediatric traumatic brain injury (TBI) as a model, this study investigated the sub-acute effect of brain injury on gray-matter volume of three large-scale, domain-general brain networks (the Default Mode Network, DMN; the Central Executive Network, CEN; and the Salience Network, SN), as well as two domain-specific neural networks implicated in social-affective processes (the Cerebro-Cerebellar Mentalizing Network, CCMN, and the Mirror Neuron/Empathy Network, MNEN)...
May 15, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28502226/stronger-interference-from-distractors-in-the-right-hemifield-during-visual-search
#16
Christophe Carlei, Dirk Kerzel
The orientation-bias hypothesis states that there is a bias to attend to the right visual hemifield (RVF) when there is spatial competition between stimuli in the left and right hemifield [Pollmann, S. (1996). A pop-out induced extinction-like phenomenon in neurologically intact subjects. Neuropsychologia, 34(5), 413-425. doi: 10.1016/0028-3932(95)00125-5 ]. In support of this hypothesis, stronger interference was reported for RVF distractors with contralateral targets. In contrast, previous studies using rapid serial visual presentation (RSVP) found stronger interference from distractors in the left visual hemifield (LVF)...
May 13, 2017: Laterality
https://www.readbyqxmd.com/read/28500000/hierarchical-contour-closure-based-holistic-salient-object-detection
#17
Qing Liu, Xiaopeng Hong, Beiji Zou, Jie Chen, Zailiang Chen, Guoying Zhao
Most existing salient object detection methods compute the saliency for pixels, patches or superpixels by contrast. Such fine-grained contrast based salient object detection methods are stuck with saliency attenuation of the salient object and saliency overestimation of the background when the image is complicated. To better compute the saliency for complicated images, we propose a hierarchical contour closure based holistic salient object detection method, in which two saliency cues, i.e., closure completeness and closure reliability are thoroughly exploited...
May 10, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28499997/enhancement-of-visual-comfort-and-sense-of-presence-on-stereoscopic-3d-images
#18
Heeseok Oh, Jongyoo Kim, Jinwoo Kim, Taewan Kim, Sanghoon Lee, Alan C Bovik
Conventional stereoscopic 3D (S3D) displays do not provide accommodation depth cues of the 3D image or video contents being viewed. The sense of content depths is thus limited to cues supplied by motion parallax (for 3D video), stereoscopic vergence cues created by presenting left and right views to the respective eyes, and other contextual and perspective depth cues. The absence of accommodation cues can induce two kinds of accommodation vergence mismatches (AVM) at the fixation and peripheral points, which can result in severe visual discomfort...
May 9, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28499836/inhibitory-control-for-emotional-and-neutral-scenes-in-competition-an-eye-tracking-study-in-bipolar-disorder
#19
Ana García-Blanco, Ladislao Salmerón, Manuel Perea
This study examined the inhibitory control of attention to social scenes in manic, depressive, and euthymic episodes of bipolar disorder (BD). Two scenes were simultaneously presented (happy/threatening/neutral [target] versus control). Participants were asked either to look at the emotional pictures (i.e., attend-to-emotional block) or to avoid looking at the emotional pictures (i.e., attend-to-neutral block) while their eye movements were recorded. The initial orienting (latency and percentage of first fixation) and subsequent attentional engagement (gaze duration) were computed...
May 10, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28499208/whole-brain-resting-state-functional-connectivity-identified-major-depressive-disorder-a-multivariate-pattern-analysis-in-two-independent-samples
#20
Xue Zhong, Huqing Shi, Qingsen Ming, Daifeng Dong, Xiaocui Zhang, Ling-Li Zeng, Shuqiao Yao
BACKGROUND: there has been a recent increase in the use of connectome-based multivariate pattern analysis (MVPA) of resting-state functional magnetic resonance imaging (fMRI) data aimed at distinguishing patients with major depressive disorder (MDD) from healthy controls (HCs). However, the validity of this method needs to be confirmed in independent samples. METHOD: we used resting-state fMRI to explore whole-brain functional connectivity (FC) patterns characteristic of MDD and to confirm the effectiveness of MVPA in distinguishing MDD versus HC groups in two independent samples...
April 21, 2017: Journal of Affective Disorders
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