A5081429343- Advanced Neuroimaging Techniques and Applications
- Advanced MRI Techniques and Applications
- Functional Brain Connectivity Studies
- Fetal and Pediatric Neurological Disorders
- Visual perception and processing mechanisms
- Hemispheric Asymmetry in Neuroscience
- Neural and Behavioral Psychology Studies
- Spatial Neglect and Hemispheric Dysfunction
- Neurobiology of Language and Bilingualism
- Neural dynamics and brain function
- Spatial Cognition and Navigation
- MRI in cancer diagnosis
- Vestibular and auditory disorders
- French Urban and Social Studies
- Motor Control and Adaptation
- Medical Imaging and Analysis
- EEG and Brain-Computer Interfaces
- Bone and Joint Diseases
- Education, sociology, and vocational training
- Ophthalmology and Eye Disorders
- Child and Animal Learning Development
- Multisensory perception and integration
- Cultural Insights and Digital Impacts
- Memory and Neural Mechanisms
- Action Observation and Synchronization
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
2016-2024
European Organisation for Rare Diseases
2024
Laboratoire Bordelais de Recherche en Informatique
2024
Centre Hospitalier Universitaire de Bordeaux
2024
Neurocentre Magendie
2024
Inserm
2009-2024
Institut Polytechnique de Bordeaux
2024
Abstract Tractography based on non-invasive diffusion imaging is central to the study of human brain connectivity. To date, approach has not been systematically validated in ground truth studies. Based a simulated data set with tracts, we organized an open international tractography challenge, which resulted 96 distinct submissions from 20 research groups. Here, report encouraging finding that most state-of-the-art algorithms produce tractograms containing 90% bundles (to at least some...
Working memory is the process of maintaining an active representation information so that it available for use. In monkeys, a prefrontal cortical region important spatial working lies in and around principal sulcus, but humans location, even existence, dispute. By using functional magnetic resonance imaging humans, area superior frontal sulcus was identified specialized memory. This located more superiorly posteriorly human than monkey brain, which may explain why not recognized previously.
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...
White matter bundle segmentation using diffusion MRI fiber tractography has become the method of choice to identify white pathways in vivo human brains. However, like other analyses complex data, there is considerable variability protocols and techniques. This can result different reconstructions same intended pathways, which directly affects results, quantification, interpretation. In this study, we aim evaluate quantify that arises from for segmentation. Through an open call users...
We have taken advantage of the temporal resolution afforded by functional magnetic resonance imaging (fMRI) to investigate role played medial wall areas in humans during working memory tasks. demarcated motor activated simple manual movement, namely supplementary area (SMA) and cingulate (CMA), those visually guided saccadic eye movements, field (SEF). determined location sustained activity over delays relation these landmarks both spatial face identified two distinct areas, pre-SMA caudal...
We have investigated the functional anatomy of pursuit eye movements in humans with magnetic imaging. The performance induced activations cortical fields also activated during execution visually guided saccadic movements, namely precentral cortex [frontal field (FEF)], medial superior frontal (supplementary field), intraparietal (parietal and precuneus, at junction occipital temporal (MT/MST) cortex. Pursuit-related areas could be distinguished from saccade-related both terms spatial extent...
Petit, L., V. P. Clark, J. Ingeholm, and Haxby. Dissociation of saccade-related pursuit-related activation in human frontal eye fields as revealed by fMRI. Neurophysiol. 77: 3386–3390, 1997. The location the (FEFs) underlying horizontal visually guided saccadic pursuit movements was investigated with use functional magnetic resonance imaging five healthy humans. Execution both induced bilateral FEF located medially at junction precentral sulcus superior extending laterally to gyrus. These...
1. The purpose of this work was to explore the cortical and subcortical mechanisms underlying execution voluntary saccadic eye movements in humans. 2. Normalized regional cerebral blood flow (NrCBF) measured using positron emission tomography (PET) H2(15O) bolus intravenous injections four right-handed healthy volunteers at rest while performing self-paced horizontal total darkness. 3. Magnetic resonance imaging each subject's brain matched PET images, allowing detection activation...
We have used positron emission tomography (PET) to study the functional anatomy of repetition a prelearned sequence horizontal saccadic eye movements. Five subjects had memorize six successive saccades. The were scanned in total darkness under three different conditions: at rest, during execution self-paced saccades, and while repeating saccades sequence. led specific normalized regional cerebral blood flow (NrCBF) increases depth superior frontal sulcus as well rostral part supplementary...