A5064551137- Neural dynamics and brain function
- EEG and Brain-Computer Interfaces
- Functional Brain Connectivity Studies
- Neuroscience and Music Perception
- Psychological and Temporal Perspectives Research
- Visual perception and processing mechanisms
- Neural and Behavioral Psychology Studies
- Neural Networks and Applications
- Multisensory perception and integration
- stochastic dynamics and bifurcation
- Advanced MRI Techniques and Applications
- Advanced Memory and Neural Computing
- Neuroscience and Neural Engineering
- Face Recognition and Perception
- Noise Effects and Management
- Sleep and Wakefulness Research
- Cognitive Science and Education Research
- Neurological Disorders and Treatments
- Facial Nerve Paralysis Treatment and Research
- Memory and Neural Mechanisms
- Advanced Vision and Imaging
- Business, Education, Mathematics Research
- Psychological Well-being and Life Satisfaction
- Music Therapy and Health
- Trigeminal Neuralgia and Treatments
Institut du Cerveau
2016-2024
Inserm
2009-2024
Sorbonne Université
2008-2024
Centre National de la Recherche Scientifique
2006-2024
Laboratoire de Neurosciences Cognitives
2007-2024
Assistance Publique – Hôpitaux de Paris
2022-2024
Pitié-Salpêtrière Hospital
2022-2024
Fondation de l'Avenir
2022
Allen Institute for Brain Science
2019-2021
Humboldt-Universität zu Berlin
2012-2017
The brain exhibits organized fluctuations of neural activity, even in the absence tasks or sensory input. A prominent type such spontaneous activity is alpha rhythm, which influences perception and interacts with other ongoing activity. It currently hypothesized that states decreased prestimulus α oscillations indicate enhanced excitability, resulting improved perceptual acuity. Nevertheless, it remains debated how changes excitability manifest at behavioral level tasks. We addressed this...
Neuroscience is advancing standardization and tool development to support rigor transparency. Consequently, data pipeline complexity has increased, hindering FAIR (findable, accessible, interoperable reusable) access. brainlife.io was developed democratize neuroimaging research. The platform provides standardization, management, visualization processing automatically tracks the provenance history of thousands objects. Here, described evaluated for validity, reliability, reproducibility,...
Abstract Neural oscillatory synchrony could implement grouping processes, act as an attentional filter, or foster the storage of information in short-term memory. Do these findings indicate that is unspecific epiphenomenon occurring any demanding task, a fundamental mechanism involved whenever neural cooperation requested? If latter hypothesis true, then should be specific, with distinct visual processes eliciting different types oscillations. We recorded magnetoencephalogram (MEG) signals...
The ongoing state of the brain radically affects how it processes sensory information. How does this activity interact with processing external stimuli? Spontaneous oscillations in alpha range are thought to inhibit processing, but little is known about psychophysical mechanisms inhibition. We recorded EEG while human observers performed a visual detection task stimuli different contrast intensities. To move beyond qualitative description, we formally compared psychometric functions obtained...
Objects are more easily recognized in their typical context. However, is contextual information activated early enough to facilitate the perception of individual objects, or facilitation caused by postperceptual mechanisms? To elucidate this issue, we first need study temporal dynamics and neural interactions associated with processing. Studies have shown that network consists parahippocampal, retrosplenial, medial prefrontal cortices. We used functional MRI, magnetoencephalography, phase...
The development of the Brain Imaging Data Structure (BIDS; Gorgolewski et al., 2016) gave neuroscientific community a standard to organize and share data. BIDS prescribes file naming conventions folder structure store data in set already existing formats. Next rules about organization itself, provides standardized templates associated metadata form Javascript Object Notation (JSON) tab separated value (TSV) files. It thus facilitates sharing, eases querying, enables automatic analysis...
Predicting upcoming events from incomplete information is an essential brain function. The orbitofrontal cortex (OFC) plays a critical role in this process by facilitating recognition of sensory inputs via predictive feedback to cortices. In the visual domain, OFC engaged low spatial frequency (LSF) and magnocellular-biased inputs, but beyond this, we know little about content required activate it. Is automatically analyze any LSF for meaning? Or it only when matches preexisting memory...
Good scientific practice (GSP) refers to both explicit and implicit rules, recommendations, guidelines that help scientists produce work is of the highest quality at any given time, efficiently share with community for further scrutiny or utilization. For experimental research using magneto- electroencephalography (MEEG), GSP includes specific standards technical competence, which are periodically updated adapted new findings. However, also needs be regularly revisited in a broader light. At...
The COVID-19 pandemic and associated lockdowns triggered worldwide changes in the daily routines of human experience. Blursday database provides repeated measures subjective time related processes from participants nine countries tested on 14 questionnaires 15 behavioural tasks during pandemic. A total 2,840 completed at least one task, 439 all first session. data collection tools are accessible to researchers for studying effects social isolation temporal information processing,...
Searching for an object in a cluttered environment takes advantage of different cues, explicit attentional such as arrows, and visual saliency, but also memory. Behavioral studies manipulating the spatial relationships between context target search suggest that memory context-target associations could be retrieved quickly act at early perceptual stage. On other hand, neural responses are usually influenced by later, postperceptual At which level processing does influence scene analysis? In...
Oscillatory synchrony in the gamma band (30-120 Hz) has been involved various cognitive functions including conscious perception and learning. Explicit memory encoding, particular, relies on enhanced oscillations. Does this finding extend to unconscious encoding? Can we dissociate oscillations related learning perception? We investigate these issues a magnetoencephalographic experiment using modified version of contextual cueing paradigm. In visual search task, repeated presentation arrays...
The brain exhibits organized fluctuations of neural activity, even in the absence tasks or sensory input. A prominent type such spontaneous activity is alpha rhythm, which influences perception and interacts with other ongoing activity. It currently hypothesized that states decreased prestimulus α oscillations indicate enhanced excitability, resulting improved perceptual acuity. Nevertheless, it remains debated how changes excitability manifest at behavioral level tasks. We addressed this...
The cerebral cortex responds to stimuli of a wide range intensities. Previous studies have demonstrated that undetectably weak somatosensory cause functional deactivation or inhibition in cortex. In the present study, we tested whether invisible visual lead similar responses, indicated by an increase EEG alpha-band power-an index cortical excitability. We presented subliminal and supraliminal after estimating each participant's detection threshold. Stimuli consisted peripherally small...
Statistical power is key for robust, replicable science. Here, we systematically explored how numbers of trials and subjects affect statistical in MEG sensor-level data. More specifically, simulated "experiments" using the resting-state dataset Human Connectome Project (HCP). We divided data two conditions, injected a dipolar source at known anatomical location "signal condition", but not "noise detected significant differences sensor level with classical paired t-tests across subjects,...
Abstract Psychological time is influenced by multiple factors such as arousal, emotion, attention and memory. While laboratory observations are well documented, it remains unclear whether cognitive effects on perception replicate in real-life settings. This study exploits a set of data collected online during the Covid-19 pandemic, where participants completed verbal working memory (WM) task which their load was manipulated using parametric n-back (1-back, 3-back). At end every WM trial,...
Abstract The COVID-19 pandemic and associated measures have affected routines mental well-being of people around the world. Research also shows distorted time perception during lockdowns which can partially be explained by compromised well-being. present study investigates Canadians’ temporal experience at two periods national lockdown (spring 2020: n = 66; beginning 2021: 100). As results indicate, only difference between these on investigated variables was strictness measures. Our findings...
In mammals, the visual field is split along midline, each hemisphere representing contralateral hemifield. We determined that, in ferret, an 8- to 10-deg-wide strip of near midline represented both hemispheres. Bright squares (1.5 deg) were flashed at different azimuths within central 20 deg field. Stimuli either alone or sequentially, and responses analyzed with voltage-sensitive dye (VSD) RH 795 and/or by recording local potentials (LFPs). VSD LFP experiments, stimulus evoked a cortical...
Brain regions that process affect are strongly connected with visual regions, but the functional consequences of this structural organization have been relatively unexplored. How does momentary an observer influence perception? We induced either pleasant or unpleasant in participants and then recorded their neural activity using magnetoencephalography while they completed object recognition task. hypothesized, found, influenced speed by modulating amplitude evoked responses occipitotemporal...