A5020023263- Functional Brain Connectivity Studies
- Hemispheric Asymmetry in Neuroscience
- Advanced Neuroimaging Techniques and Applications
- Neural dynamics and brain function
- EEG and Brain-Computer Interfaces
- Advanced MRI Techniques and Applications
- Neurobiology of Language and Bilingualism
- Spatial Neglect and Hemispheric Dysfunction
- Neural and Behavioral Psychology Studies
- Scientific Computing and Data Management
- Biomedical Text Mining and Ontologies
- Action Observation and Synchronization
- Neuroscience and Music Perception
- Fetal and Pediatric Neurological Disorders
- Visual perception and processing mechanisms
- Cognitive and developmental aspects of mathematical skills
- Face Recognition and Perception
- Migraine and Headache Studies
- Morphological variations and asymmetry
- Mental Health Research Topics
- Reading and Literacy Development
- Neuroscience, Education and Cognitive Function
- Motor Control and Adaptation
- Spatial Cognition and Navigation
- Semantic Web and Ontologies
Université de Bordeaux
2016-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut des Maladies Neurodégénératives
2016-2025
California Earthquake Authority
2011-2024
Imagerie et Cerveau
2011-2022
Institut d'Imagerie Biomédicale
1996-2021
Institut de Neurosciences Cognitives et Intégratives d’Aquitaine
2020-2021
Grenoble Institute of Neurosciences
2018
Centre Hospitalier Universitaire de Bordeaux
2014
Following a first version AAL of the automated anatomical labeling atlas (Tzourio-Mazoyer et al., 2002), second (AAL2) (Rolls 2015) was developed that provided an alternative parcellation orbitofrontal cortex following description by Chiavaras, Petrides, and colleagues. We now provide third version, AAL3, which adds number brain areas not previously defined, but interest in many neuroimaging investigations. The 26 new are subdivision anterior cingulate into subgenual, pregenual supracallosal...
Spontaneous oscillatory electrical activity at a frequency near 40 Hz in the human brain and its reset by sensory stimulation have been proposed to be related cognitive processing temporal binding of stimuli. These experiments were designed test this hypothesis determine specifically whether minimal interval required identify separate auditory stimuli correlates with 40-Hz magnetic signal. Auditory clicks presented varying times, while was recorded from awake subjects. Experimental modeling...
Hemispheric lateralization for language production and its relationships with manual preference strength were studied in a sample of 297 subjects, including 153 left-handers (LH). A hemispheric functional index (HFLI) was derived from fMRI acquired during covert sentence generation task as compared word list recitation. The multimodal HFLI distribution optimally modeled using mixture 3 4 Gaussian functions right-handers (RH) LH, respectively. function parameters helped to define types...
Spontaneous brain activity was mapped with functional MRI (fMRI) in a sample of 180 subjects while conscious resting-state condition. With the use independent component analysis (ICA) each individual fMRI signal and classification ICA-defined components across subjects, set 23 networks (RNs) identified. Functional connectivity between pair RNs assessed using temporal correlation analyses 0.01- to 0.1-Hz frequency band, corresponding coefficients used obtain hierarchical clustering RNs. At...
Left-right hemispheric asymmetry is an important aspect of healthy brain organization for many functions including language, and it can be altered in cognitive psychiatric disorders. No mechanism has yet been identified establishing the human brain's left-right axis. We performed multivariate genome-wide association scanning cortical regional surface area thickness asymmetries, subcortical volume using data from 32,256 participants UK Biobank. There were 21 significant loci associated with...
Abstract Perivascular space (PVS) burden is an emerging, poorly understood, magnetic resonance imaging marker of cerebral small vessel disease, a leading cause stroke and dementia. Genome-wide association studies in up to 40,095 participants (18 population-based cohorts, 66.3 ± 8.6 yr, 96.9% European ancestry) revealed 24 genome-wide significant PVS risk loci, mainly the white matter. These were associated with matter already young adults ( N = 1,748; 22.1 2.3 yr) enriched early-onset...
Laterality indices (LIs) quantify the left-right asymmetry of brain and behavioural variables provide a measure that is statistically convenient seemingly easy to interpret. Substantial variability in how structural functional asymmetries are recorded, calculated, reported, however, suggest little agreement on conditions required for its valid assessment. The present study aimed consensus general aspects this context laterality research, more specifically within particular method or...
A variety of clinical and experimental findings suggest that parkinsonian resting tremor results from the involuntary activation a central mechanism normally used for production rapid voluntary alternating movements. However, such motor loop oscillations have never been directly demonstrated in patients. Using magnetoencephalography, we recorded synchronized tremor-related neuromagnetic activity over wide areas frontal parietal cortex. The spatial temporal organization this was studied seven...
Positron emission tomography (PET) was used to monitor regional cerebral blood flow variations while subjects were constructing mental images of objects made three-dimensional cube assemblies from auditorily presented instructions. This spatial imagery task contrasted with both passive listening (LIST) phonetically matched nonspatial word lists and a silent rest (REST) condition. All three tasks performed in total darkness. Mental construction (CONS) specifically activated bilateral...
We combined the neuroanatomists' approach of defining a fascicle as all fibers passing through its compact stem with diffusion-weighted tractography to investigate cortical terminations two association tracts, inferior fronto-occipital fasciculus (IFOF) and uncinate (UF), which have recently been implicated in ventral language circuitry. The aim was provide detailed quantitative description their 60 healthy subjects do so apply an anatomical stem-based virtual dissection, mimicking classical...
This study describes the gyrification patterns and surface areas of Heschl's gyrus (HG) in 430 healthy volunteers mapped with magnetic resonance imaging. Among 232 right-handers, we found a large occurrence duplication (64 %), especially on right (49 vs. 37 % left). Partial was twice more frequent left than complete duplication. On opposite, hemisphere, 10 partial The most inter-hemispheric were bilateral single HG (36 %) single-right (27 %). least common duplication-right (22 (15...
Significance Left-handedness occurs in roughly 10% of people, but whether it involves altered brain anatomy has remained unclear. We measured left to right asymmetry the cerebral cortex 28,802 right-handers and 3,062 left-handers. There were small average differences between two handedness groups regions important for hand control, language, vision, working memory. Genetic influences on associated with some these asymmetries, especially language-related regions. This suggests links language...