A5063977822- Neural dynamics and brain function
- Functional Brain Connectivity Studies
- EEG and Brain-Computer Interfaces
- Mental Health Research Topics
- Embodied and Extended Cognition
- Face Recognition and Perception
- Psychosomatic Disorders and Their Treatments
- Mind wandering and attention
- Sleep and Wakefulness Research
- Memory and Neural Mechanisms
- Advanced Neuroimaging Techniques and Applications
- Action Observation and Synchronization
- Neuroscience and Music Perception
- Biofield Effects and Biophysics
- Neuroscience and Neural Engineering
- Psychedelics and Drug Studies
- Neural and Behavioral Psychology Studies
- Empathy and Medical Education
- Neurological disorders and treatments
- Mindfulness and Compassion Interventions
- Visual perception and processing mechanisms
- Clinical Reasoning and Diagnostic Skills
- Dental Anxiety and Anesthesia Techniques
- Blind Source Separation Techniques
- Epilepsy research and treatment
University of Ottawa
2022-2025
Royal Ottawa Mental Health Centre
2022-2024
uOttawa Brain and Mind Research Institute
2022-2024
MIND Research Institute
2022
University of Bergamo
2022
Public Health Dayton & Montgomery County
2016
Our perceptions and decisions are not always objectively correct as they featured by a bias related to our self. What the behavioral, neural, computational mechanisms of such cognitive bias? Addressing this yet unresolved question, we here investigate whether is temporal integration segregation mediated brain's Intrinsic neural timescales (INT). Using Signal Detection Theory (SDT), operationalize Criterion C distinguished from sensitivity index d’. This was probed in self-task based on...
The brain shows a topographical hierarchy along the lines of lower- and higher-order networks. exact temporal dynamics characterization this lower-higher-order topography at rest its impact on task states remains unclear, though. Using 2 functional magnetic resonance imaging data sets, we investigate networks in terms signal compressibility, operationalized by Lempel-Ziv complexity (LZC). As assume that degree is related to slow-fast frequency balance, also compute median (MF), an estimation...
Abstract Scale-free physiological processes are ubiquitous in the human organism. Resting-state functional MRI studies observed loss of scale-free dynamics under anesthesia. In contrast, modulation during task-related activity remains an open question. We investigate cerebral cortex’s unimodal periphery and transmodal core topography rest task states three conscious levels (awake, sedation, anesthesia) complemented by computational modelling (Stuart-Landau model). The empirical findings...
The brain is continuously bombarded by external stimuli, which are processed in different input systems. intrinsic features of these sensory systems remain yet unclear. Investigating topography and dynamics the goal our study order to better understand that shape their neural processing. Using a functional magnetic resonance imaging dataset, we measured during rest task states. Neural were probed scale-free activity, with power-law exponent (PLE), as well order/disorder sample entropy...
The human brain's cerebral cortex exhibits a topographic division into higher-order transmodal core and lower-order unimodal periphery regions. While timescales between the region diverge, features of their power spectra, especially scale-free dynamics during resting-state mdulation in task states, remain unclear. To answer this question, we investigated ~1/f-like pink noise manifestation core-periphery topography rest states applying infra-slow inter-trial intervals up to 1 min falling...
Meditation encompasses a range of practices employing diverse induction techniques, each characterized by distinct attentional focus. In Mantra meditation, for instance, practitioners direct their attention narrowly to given sentence that is recursively repeated, while other forms meditation such as Shoonya are induced wider Here we aimed identify the neural underpinnings and correlates associated with this spectrum foci. To accomplish this, used EEG data estimate brain's intrinsic...
The relationship of the brain's intrinsic neural timescales (INTs) during resting state with event-related activity in response to external stimuli remains poorly understood. Here, we bridge this gap by combining computational modeling magnetoencephalography (MEG) data investigate relation neuronal (INT) task-related activity, e.g., fields (ERFs). Using Jansen-Rit model, first show that intracolumnar (and thus intra-regional) excitatory and inhibitory connections (rather than inter-regional...
Understanding the brain's intrinsic architecture has long been a central focus of neuroscience, with recent advances shedding light on its topographic organization along uni and transmodal regions. How global uni-transmodal topography relates to psychological features like our sense self remains yet unclear, though. We here combine fMRI brain imaging computational modeling (Wilson Cowan model) better understand temporal, spatial physiological underlying distinction non-self regions within...
The common approach to studying the effects of breathing on emotion and cognition is characterize statically by using average or instantaneous rate amplitude. While these measures are useful for measuring activity, they less capturing intrinsic dynamics signal, that is, patterns change in its activity over time. relationship between emotion/cognition remains unclear. To fill this knowledge gap, we characterized a set which capture signal’s amplitude central tendency, variability, complexity,...
The common approach to studying the effects of breathing on emotion and cognition is characterize statically by using average or instantaneous rate amplitude. While these measures are useful for measuring activity, they less capturing intrinsic dynamics signal, that is, patterns change in its activity over time. relationship between emotion/cognition remains unclear. To fill this knowledge gap, we characterized a set which capture signal’s amplitude central tendency, variability, complexity,...
The self is the core of our mental life which connects one's inner with external perception. Since synchrony a key feature biological world and its various species, what role does it play for humans? We conducted large-scale psychological study (n = 1072) combining newly developed visual analogue scales (VAS) perception internal cognition complemented by several questionnaires. Overall, findings showed close connection both (i.e., body cognition) others, environment/nature) being associated...
Working memory (WM) describes the dynamic process of maintenance and manipulation information over a certain time delay. Neuronally, WM recruits distributed network cortical regions like visual dorsolateral prefrontal cortex as well subcortical hippocampus. How input dynamics subsequent neural impact remains unclear though. To answer this question, we combined analysis behavioral capacity with measuring through task-related power spectrum changes, e.g., median frequency (MF) in functional...
Abstract Recent neuroimaging studies demonstrate a heterogeneity of timescales prevalent in the brain’s ongoing spontaneous activity, labeled intrinsic neural (INT). At same time, also reflect stimulus- or task-related activity. The relationship INT during activity with their involvement task states including behavior remains unclear. To address this question, we combined calcium imaging data spontaneously behaving mice and human electroencephalography (EEG) rest computational modeling. We...
The human brain is a highly dynamic organ that operates across variety of timescales, the intrinsic neural timescales (INT). In addition to INT, waves featured by its phase-related processes including their cycles with peak/trough and rise/fall play key role in shaping brain's activity. However, relationship between ongoing wave dynamics INT remains yet unclear. this study, we utilized functional magnetic resonance imaging (fMRI) rest task data from Human Connectome Project (HCP) investigate...
Abstract Functional magnetic resonance imaging (fMRI) studies have demonstrated that intrinsic neuronal timescales (INT) undergo modulation by external stimulation during consciousness. It remains unclear if INT keep the ability for significant stimulus-induced primary unconscious states, such as sleep. This fMRI analysis addresses this question via a dataset comprises an awake resting-state plus rest and stimulus states We analyzed measured temporal autocorrelation supported median...
This scientific commentary refers to ‘Brain dynamics predictive of response psilocybin for treatment-resistant depression’, by Vohryzek et al. (https://doi.org/10.1093/braincomms/fcae049)
Electroencephalography studies link sensory processing issues in schizophrenia to increased noise level-noise here is background spontaneous activity-as measured by the signal-to-noise ratio. The mechanism, however, of such unknown. We investigate if this relates changes cortical excitation-inhibition balance, which has been observed be atypical schizophrenia, combining electroencephalography and computational modeling. Our task results, for local field potentials can used as a proxy, show...
Purpose: Facial emotion recognition is a basic element in non-verbal communication. Although some researchers have shown that recognizing facial expressions may be important the interaction between doctors and patients, there are no studies concerning nurses. Here, we aimed to investigate ability nurses compare abilities from psychiatry other departments.
 
 Methods: In this cross-sectional study, sixty seven were divided into two groups according their departments: (n=31); and,...
Time delays are a signature of many physical systems, including the brain, and considerably shape their dynamics; moreover, they play key role in consciousness, as postulated by temporo-spatial theory consciousness (TTC). However, often not known priori need to be estimated from time series. In this study, we propose use permutation entropy (PE) estimate neural series more robust alternative widely used autocorrelation window (ACW). first part, demonstrate validity approach on synthetic...
Abstract The brain can be characterized by an intrinsic hierarchy in its topography which, as recently shown for the uni-transmodal distinction of core and periphery, converges with dynamics. Does such hierarchical organization both dynamic also apply to brain’s inner itself higher-order cognitive functions like self? Applying multiple fMRI data sets, we show how established three-layer self (internal, external, mental) is already present during resting state carried over task states...
The self is the core of our mental life which connects one’s inner with external perception. Since synchrony a key feature biological world and its various species, what role does it play for humans? We conducted large-scale psychological study (n = 1072) combining newly developed visual analogue scales (VAS) perception internal cognition complemented by several questionnaires. Overall, findings showed close connection both (i.e., body cognition) others, environment/nature) being associated...