Review
Behavioral Sciences
Michael C. W. English, Murray T. Maybery, Troy A. W. Visser
Summary: Most individuals have a slight bias towards visual stimuli in their left visual field (LVF), indicating right-brain specialization in visuospatial functions. Neurodevelopmental disorders can alter this bias, suggesting a connection to changes in hemispheric asymmetry. We reviewed existing literature on the link between autism and alterations in visuospatial bias, finding 13 studies that explored this issue. Evidence consistently showed reduced LVF bias in individuals with autism, particularly in studies measuring attentional bias or preference using tasks like line bisection, while findings were less conclusive for studies measuring attentional performance (e.g., reaction time). Further research and recommendations for extending this line of inquiry are needed.
Article
Neurosciences
Madeline Peterson, Molly B. D. Prigge, Erin D. Bigler, Brandon Zielinski, Jace B. King, Nicholas Lange, Andrew Alexander, Janet E. Lainhart, Jared A. Nielsen
Summary: The study found no significant increase in extra-axial cerebrospinal fluid volume in autistic individuals beyond the age of four, compared to controls.
Article
Psychology, Multidisciplinary
Min Huang, Lexian Shen, Shuyuan Xu, Yanhong Huang, Shaojuan Huang, Xuemei Tang
Summary: The role of the two hemispheres in processing metaphoric language is controversial. This study introduced scientific metaphors as novel metaphors to examine hemispheric asymmetry in metaphoric processing. It found that both hemispheres were involved at the initial stage of metaphor processing, but the right hemisphere had a more important role. The activation of the left hemisphere for scientific metaphoric processing supported the fine-coarse coding hypothesis. Furthermore, novel metaphors and conventional metaphors elicited different hemispheric activation at the later mapping stage.
FRONTIERS IN PSYCHOLOGY
(2022)
Article
Multidisciplinary Sciences
Gesa Berretz, Julian Packheiser, Oliver T. Wolf, Sebastian Ocklenburg
Summary: Frontal EEG alpha band asymmetries, specifically left hemispheric activation, were found to be stronger under stress compared to a non-stressful control condition. This result supports the asymmetric inhibition model and the capability model of emotional regulation, suggesting that frontal asymmetries during emotional challenge are more pronounced than during rest.
Review
Neurosciences
Sebastian Ocklenburg, Jutta Peterburs, Annakarina Mundorf
Summary: This review article provides an integrated overview of existing research findings on amygdala asymmetries. The study finds that hemispheric asymmetries in the amygdala exist in terms of both function and structure, and these asymmetries are influenced by temporal characteristics, emotional valence, and perceptual properties. Furthermore, the article highlights the alterations of amygdala asymmetries reported in different patient groups, contributing to a deeper understanding of atypical amygdala asymmetries.
PROGRESS IN NEUROBIOLOGY
(2022)
Article
Neurosciences
Xinyu Liang, Chenxi Zhao, Xinhu Jin, Yaya Jiang, Liyuan Yang, Yijun Chen, Gaolang Gong
Summary: The study found symmetrical functional gradients between the left and right hemispheres of the human brain, with the left hemisphere showing a larger range of the principal gradient and greater asymmetry in males. Additionally, sex had an impact on the asymmetry of certain brain regions.
Article
Multidisciplinary Sciences
Valeriia Demareva, Elena Mukhina, Tatiana Bobro, Ildar Abitov
Summary: The pilot study examined how double neurofeedback influenced functional hemispheric asymmetry and activity, finding that double neurofeedback did not directly influence the asymmetry itself but accelerated individual sound perception characteristics. Further research is needed to investigate the effects of double neurofeedback training on functional brain activity, considering factors such as age, gender, and motivation.
Article
Neurosciences
Leah T. Johnstone, Emma M. Karlsson, David P. Carey
Summary: Neuroscientific techniques show that left-handers have more unusual cerebral asymmetries for language compared to right-handers, with left-handers demonstrating less lateralization for language, faces, and bodies when they have typical cerebral asymmetries.
Review
Clinical Neurology
Annakarina Mundorf, Sebastian Ocklenburg
Summary: The brain exhibits hemispheric asymmetries to facilitate efficient neuronal processing, and animal models of mental disorders provide important insights into the relationship between asymmetries and symptoms. Studies in rats and mice have revealed increased right-hemispheric activity and left-sided behavioral bias in anxiety, fear, anhedonia, despair, and stress-related disorders. There is also evidence of right-sided bias in addiction behavior and asymmetrical accumulation of fibrillar plaques in transgenic models of Alzheimer's disease.
JOURNAL OF NEURAL TRANSMISSION
(2023)
Article
Neurosciences
Hyuk Jin Yun, Hyun Ju Lee, Joo Young Lee, Tomo Tarui, Caitlin K. Rollins, Cynthia M. Ortinau, Henry A. Feldman, P. Ellen Grant, Kiho Im
Summary: The study quantified the timing of sulcal emergence and its temporal variability across typically developing fetuses, finding a regular pattern of emergence and earlier onset in some sulci for female fetuses compared to males.
Article
Multidisciplinary Sciences
Chiara Spironelli, Alessandro Angrilli
Summary: Research has shown the presence of complex asymmetries during word matching tasks, particularly in the comparison of words. Findings suggest the existence of complex task- and time-dependent hemispheric asymmetries during word matching tasks.
Review
Endocrinology & Metabolism
Marcia Roeper, Henrike Hoermann, Sebastian Kummer, Thomas Meissner
Summary: Neonatal hypoglycemia lacks a uniform definition and guidelines vary in screening, intervention, and management. Further research is needed to address this issue and develop better management strategies.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Anatomy & Morphology
Tulio Guadalupe, Xiang-Zhen Kong, Sophie E. A. Akkermans, Simon E. Fisher, Clyde Francks
Summary: The study demonstrates a relationship between hemispheric asymmetries of auditory processing and grey matter asymmetry in subcortical structures, indicating the need to investigate subcortical structures in addition to auditory cortex in relation to hemispheric dominance for speech processing.
BRAIN STRUCTURE & FUNCTION
(2022)
Article
Anatomy & Morphology
Patrick Friedrich, Kaustubh R. Patil, Lisa N. Mochalski, Xuan Li, Julia A. Camilleri, Jean-Philippe Kroell, Lisa Wiersch, Simon B. Eickhoff, Susanne Weis
Summary: This study introduces a novel framework based on machine learning for identifying the characterizing features that underlie hemispheric differences. The analysis shows that both left and right hemispheres can be accurately classified in both low-dimensional and high-dimensional representations. Utilizing a feature selection algorithm helps to determine the voxels that contribute most to accurate classification.
BRAIN STRUCTURE & FUNCTION
(2022)
Article
Clinical Neurology
Goncalo Cotovio, Daniel Rodrigues da Silva, Estela Real Lage, Carolina Seybert, Albino J. Oliveira-Maia
Summary: Mood disorders are associated with lateralized brain dysfunction, with depression predominantly on the left side and mania predominantly on the right side. This study reviewed and summarized the asymmetry of motor cortical excitability measured by transcranial magnetic stimulation (TMS) in mood disorders. The study found interhemispheric asymmetry of motor cortical excitability, with lower left-hemisphere excitability in major depressive disorder and lower right hemisphere excitability in bipolar depression.
CLINICAL NEUROPHYSIOLOGY
(2022)
