A5047679894- Neural dynamics and brain function
- Functional Brain Connectivity Studies
- Neural and Behavioral Psychology Studies
- EEG and Brain-Computer Interfaces
- Memory and Neural Mechanisms
- Sleep and Wakefulness Research
- Cognitive Abilities and Testing
- Olfactory and Sensory Function Studies
- Business, Innovation, and Economy
- Transcranial Magnetic Stimulation Studies
- Neuroscience and Neuropharmacology Research
- Anesthesia and Sedative Agents
- Educational Outcomes and Influences
- Intensive Care Unit Cognitive Disorders
- Developmental and Educational Neuropsychology
- Neuroscience, Education and Cognitive Function
- Fractal and DNA sequence analysis
- Mental Health Research Topics
- Advanced Memory and Neural Computing
- Health and Well-being Studies
- Neural Networks and Applications
- Receptor Mechanisms and Signaling
- Educational and Psychological Assessments
Pontificia Universidad Católica de Chile
2019-2024
University of Illinois Urbana-Champaign
2022-2024
Abstract Characterization of brain states is essential for understanding its functioning in the absence external stimuli. Brain differ on their balance between excitation and inhibition, diversity activity patterns. These can be respectively indexed by 1/f slope Lempel–Ziv complexity (LZc). However, whether how these two state properties relate remain elusive. Here we analyzed relation LZc with in-silico approaches both rat EEG monkey ECoG data. We contrasted resting propofol anesthesia,...
Cognitive planning, the ability to develop a sequenced plan achieve goal, plays crucial role in human goal-directed behavior. However, specific of frontal structures planning is unclear. We used novel and ecological task, that allowed us separate period from execution period. The spatio-temporal dynamics EEG recordings showed induced progressive sustained increase frontal-midline theta activity (FMθ) over time. Source analyses indicated this was generated within prefrontal cortex. Theta...
Characterization of brain states is essential for understanding its functioning in the absence external stimuli. Brain differ on their balance between excitation and inhibition, diversity activity patterns. These can be respectively indexed by 1/f slope Lempel-Ziv Complexity (LZc). However, whether how these two state properties relate remain elusive. Here we analyzed relation LZc with in-silico approaches both rat EEG monkey ECoG data. We contrasted resting propofol anesthesia, which...
Hippocampal-dependent memories emerge late during postnatal development, aligning with hippocampal maturation. During sleep, the two-stage memory formation model states that through hippocampal-neocortical interactions, cortical slow-oscillations (SO), thalamocortical Spindles, and sharp-wave ripples (SWR) are synchronized, allowing for consolidation of hippocampal-dependent memories. However, evidence supporting this hypothesis development is still lacking. Therefore, we performed...
Long-term memories are formed by repeated reactivation of newly encoded information during sleep. This process can be enhanced using memory-associated reminder cues like sounds and odors. While auditory cueing has been researched extensively, few electrophysiological studies have exploited the various benefits olfactory cueing. We used high-density electroencephalography in an odor-cueing paradigm that was designed to isolate neural responses specific declarative memories. show widespread...
The planning process, characterized by the capability to formulate an organized plan reach a goal, is essential for human goal-directed behavior. Since compromised in several neuropsychiatric disorders, implementation of proper clinical and experimental tests examine critical. Due nature deployment planning, which cognitive domains participate, assessment design behavioral paradigms coupled with neuroimaging methods are current challenges neuroscience. A task was evaluated combination...
La planificación es definida como la habilidad de desarrollar un plan secuenciado pasos conductuales para alcanzar una meta y forma parte conjunto funciones cognitivas alto orden denominadas ejecutivas. Esta función se ve afectada en diversas situaciones vida cotidiana variedad trastornos neuropsiquiátricos (por ej., depresión, ansiedad, déficit atencional, esquizofrenia, etc.). Tanto el diseño pruebas evaluar contexto clínico, también paradigmas experimentales evaluación investigación,...
Summary Mechanisms underlying loss of consciousness following propofol administration remain incompletely understood. The objective this study was to compare frontal lobe electroencephalography activity and brainstem reflexes during intravenous induction general anaesthesia, in patients receiving a typical bolus dose (fast infusion) compared with slower infusion rate. We sought determine whether suppression (‘bottom‐up’) predominates over cortical function (‘top‐down’). Sixteen ASA physical...
ABSTRACT Neural correlates of cognitive planning are not understood well at present. Behavioral paradigms targeting this function a current challenge in neuroscience. We recorded EEG activity while subjects were performing novel behavioral paradigm that evaluates function. Participants showed longer reaction times and decreased accuracy during the condition compared to control condition, suggesting is more time consuming, therefore reflecting higher demand. Moreover, induced frontal midline...
Emotion regulation is pivotal in human interactions and well-being. Modulating one's emotional state intricately linked with psychological, behavioral, physiological responses. Extensive research has explored how individuals varying attachment orientations manage emotions, predominantly through self-report measures behavioral assessments. However, the influence of on temporal electrophysiological dynamics during emotion tasks remains underexplored. Here, 90 adults' EEG brain activity was...
Abstract The aperiodic component of brain field potentials, like EEG, LFP and intracortical recordings, has shown to be a valuable tool in basic neuroscience clinical applications. Aperiodic activity is modeled as power law the spectral density, with exponent key parameter. Part interest this parameter lies its proposed role marker balance between excitatory inhibitory cortical activity. In theory, perfect would imply that same behaviour exists across all frequencies, however recent evidence...
Most clinical neurofeedback studies based on functional magnetic resonance imaging use the patient's own neural activity as feedback. The objective of this study was to create a subject-independent brain state classifier part real-time fMRI (rt-fMRI NF) system that can guide patients with depression in achieving healthy state, and then examine subsequent changes. In first step, support vector machine (SVM) trained from information happy autobiographical imagery motor blocks received female...
Detection of novel stimuli that violate statistical regularities in the sensory scene is paramount importance for survival biological organisms. Event-related potentials, phasic increases pupil size, and evoked changes oscillatory power have been proposed as markers novelty detection. However, how conscious access to modulates these different brain responses not well understood. Here, we studied neural auditory modality with without access. We identified individual thresholds discrimination...
Abstract Long-term memories are formed by repeated reactivation of newly encoded information during sleep. This process can be enhanced using memory-associated reminder cues like sounds and odors. While auditory cueing has been researched extensively, few electrophysiological studies have exploited the various benefits olfactory cueing. We used high-density electroencephalography in an odor-cueing paradigm that was designed to isolate neural responses specific declarative memories. show...
The planning process, characterized by the capability to formulate an organized plan reach a goal, is essential for human goal-directed behavior. Since compromised in several neuropsychiatric disorders, implementation of proper clinical and experimental tests examine critical. Due nature deployment planning, which cognitive domains participate, assessment design behavioral paradigms coupled with neuroimaging methods are current challenges neuroscience. A task was evaluated combination...
Abstract Detection of novel stimuli that violate statistical regularities in the sensory scene is paramount importance for survival biological organisms. Event-related potentials, phasic increases pupil size, and evoked changes oscillatory power theta (4-8 Hz) frequency range have been proposed as markers novelty detection. However, how conscious access to modulates these different brain responses not well understood. Here, we studied neural auditory modality with without access. We...