Relevant bibliographies by topics / HEMISPHERIC ASYMMETRY ANALYSES

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Academic literature on the topic 'HEMISPHERIC ASYMMETRY ANALYSES'

Author: Grafiati
Published: 11 September 2023

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Journal articles on the topic "HEMISPHERIC ASYMMETRY ANALYSES"

1

van Orden, Karl F., and John F. House. "Spatial Frequency-Dependent Asymmetry of Visual Evoked Potential Amplitudes." Perceptual and Motor Skills 82, no. 3 (1996): 1011–18. http://dx.doi.org/10.2466/pms.1996.82.3.1011.

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The extent to which pattern reversal evoked potential amplitudes are distributed symmetrically over the scalp was investigated as a function of stimulus spatial frequency. Nine right-handed male subjects viewed sinusoidal grating stimuli of 4.0 and 0.5 c/deg phase reversed every 900 msec. A visual half-field configuration enabled selective stimulation of the right- or left-hemisphere visual cortex. Evoked responses were recorded from the 2 cm above the inion (Oz) and at 7 and 13 cm lateral to Oz. Analyses of normalized evoked response amplitudes showed a significant asymmetry for the 4.0 c/deg
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2

Cao, Rui, Huiyu Shi, Xin Wang, et al. "Hemispheric Asymmetry of Functional Brain Networks under Different Emotions Using EEG Data." Entropy 22, no. 9 (2020): 939. http://dx.doi.org/10.3390/e22090939.

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Despite many studies reporting hemispheric asymmetry in the representation and processing of emotions, the essence of the asymmetry remains controversial. Brain network analysis based on electroencephalography (EEG) is a useful biological method to study brain function. Here, EEG data were recorded while participants watched different emotional videos. According to the videos’ emotional categories, the data were divided into four categories: high arousal high valence (HAHV), low arousal high valence (LAHV), low arousal low valence (LALV) and high arousal low valence (HALV). The phase lag index
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Bhowmik, Prantika. "Polar flux imbalance at the sunspot cycle minimum governs hemispheric asymmetry in the following cycle." Astronomy & Astrophysics 632 (December 2019): A117. http://dx.doi.org/10.1051/0004-6361/201834425.

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Aims. Hemispheric irregularities of solar magnetic activity is a well-observed phenomenon, the origin of which has been studied through numerical simulations and data analysis techniques. In this work we explore possible causes generating north-south asymmetry in the reversal timing and amplitude of the polar field during cycle minimum. Additionally, we investigate how hemispheric asymmetry is translated from cycle to cycle. Methods. We pursued a three-step approach. Firstly, we explored the asymmetry present in the observed polar flux and sunspot area by analysing observational data of the la
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4

Vyazovskiy, V. V., and I. Tobler. "Handedness Leads to Interhemispheric EEG Asymmetry During Sleep in the Rat." Journal of Neurophysiology 99, no. 2 (2008): 969–75. http://dx.doi.org/10.1152/jn.01154.2007.

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Sleep electroencephalographic (EEG) slow-wave activity is increased after wakefulness and decreases during sleep. Regional sleep EEG differences are thought to be a consequence of activation of specific cortical neuronal circuits during waking. We investigated the relationship between handedness and interhemispheric brain asymmetry. Bilateral EEG recordings were obtained from the frontal and occipital cortex in rats with a clear paw preference in a food-reaching task (right, n = 5; left, n = 5). While still naïve to the task, no waking or sleep EEG asymmetry was present. During the food-reachi
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Nepomnyashchikh, Alexander, Sudip Mandal, Dipankar Banerjee, and Leonid Kitchatinov. "Can the long-term hemispheric asymmetry of solar activity result from fluctuations in dynamo parameters?" Astronomy & Astrophysics 625 (May 2019): A37. http://dx.doi.org/10.1051/0004-6361/201935224.

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Context. The hemispheric asymmetry of sunspot activity observed possesses a regular component varying on a timescale of several solar cycles whose origin and properties are currently debated. Aims This paper addresses the question of whether the long-term hemispheric asymmetry can result from random variations of solar dynamo parameters in time and latitude. Methods. Scatter in the observed tilt angles of sunspot groups was estimated to infer constraints on fluctuations in the dynamo mechanism for poloidal field regeneration. A dynamo model with fluctuations in the Babcock-Leighton type α-effe
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6

Proverbio, Alice Mado, and Alberto Zani. "Hemispheric Asymmetry in Visual Processing: An ERP Study on Spatial Frequency Gratings." Symmetry 13, no. 2 (2021): 180. http://dx.doi.org/10.3390/sym13020180.

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A hemispheric asymmetry for the processing of global versus local visual information is known. In this study, we investigated the existence of a hemispheric asymmetry for the visual processing of low versus high spatial frequency gratings. The event-related potentials were recorded in a group of healthy right-handed volunteers from 30 scalp sites. Six types of stimuli (1.5, 3 and 6 c/deg gratings) were randomly flashed 180 times in the left and right upper hemifields. The stimulus duration was 80 ms, and the interstimulus interval (ISI) ranged between 850 and 1000 ms. Participants paid attenti
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7

Amodio, R., A. Prinster, A. M. Monteleone, et al. "Interhemispheric functional connectivity in anorexia and bulimia nervosa." European Psychiatry 41, S1 (2017): S551. http://dx.doi.org/10.1016/j.eurpsy.2017.01.781.

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IntroductionThe functional interplay between brain hemispheres is fundamental for behavioral, cognitive and emotional control. Several pathophysiological aspects of eating disorders (EDs) have been investigated by the use of functional Magnetic Resonance Imaging (fMRI).ObjectivesThe objective of the study was to investigate functional brain asymmetry of resting-state fMRI correlations in symptomatic patients with anorexia nervosa (AN) and bulimia nervosa (BN).AimsWe aimed at revealing whether brain regions implicated in reward, cognitive control, starvation and emotion regulation show altered
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8

Ambrosini, Ettore, and Antonino Vallesi. "Domain-general Stroop Performance and Hemispheric Asymmetries: A Resting-state EEG Study." Journal of Cognitive Neuroscience 29, no. 5 (2017): 769–79. http://dx.doi.org/10.1162/jocn_a_01076.

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The ability to suppress irrelevant information while executing a task, also known as interference resistance ability, is a function of pFC that is critical for successful goal-directed human behavior. In the study of interference resistance and, more generally, executive functions, two key questions are still open: Does pFC contribute to cognitive control abilities through lateralized but domain-general mechanisms or through hemispheric specialization of domain-specific processes? And what are the underlying causes of interindividual differences in executive control performance? To shed light
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9

Christou, Antonios I., Satoshi Endo, Yvonne Wallis, Hayley Bair, Maurice P. Zeegers, and Joseph P. McCleery. "Variation in serotonin transporter linked polymorphic region (5-HTTLPR) short/long genotype modulates resting frontal electroencephalography asymmetries in children." Development and Psychopathology 28, no. 1 (2015): 239–50. http://dx.doi.org/10.1017/s0954579415000413.

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AbstractPrevious studies have documented the serotonin transporter linked polymorphic region (5-HTTLPR) as a genetic susceptibility variant that contributes to variability in outcomes related to affective psychopathology, with the short allele associated with negative affectivity and the long allele associated with positive affectivity. In a separate but related line of research, extensive evidence suggests that frontal electroencephalography (EEG) hemispheric asymmetry in the alpha band is also associated with risk for affective psychopathologies, with leftward asymmetry associated with appro
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Shu, Ni, Yaou Liu, Yunyun Duan, and Kuncheng Li. "Hemispheric Asymmetry of Human Brain Anatomical Network Revealed by Diffusion Tensor Tractography." BioMed Research International 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/908917.

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The topological architecture of the cerebral anatomical network reflects the structural organization of the human brain. Recently, topological measures based on graph theory have provided new approaches for quantifying large-scale anatomical networks. However, few studies have investigated the hemispheric asymmetries of the human brain from the perspective of the network model, and little is known about the asymmetries of the connection patterns of brain regions, which may reflect the functional integration and interaction between different regions. Here, we utilized diffusion tensor imaging t
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