A5031924808- EEG and Brain-Computer Interfaces
- Functional Brain Connectivity Studies
- Reading and Literacy Development
- Educational and Psychological Assessments
- Cognitive and developmental aspects of mathematical skills
- Neural dynamics and brain function
- Analog and Mixed-Signal Circuit Design
- Sensor Technology and Measurement Systems
- Blind Source Separation Techniques
- Attention Deficit Hyperactivity Disorder
- Advanced MRI Techniques and Applications
- Neonatal and fetal brain pathology
- Advancements in PLL and VCO Technologies
- Advanced MEMS and NEMS Technologies
- Neural and Behavioral Psychology Studies
- Epilepsy research and treatment
- Polymer crystallization and properties
- Material Dynamics and Properties
- Child Nutrition and Water Access
- Electrochemical Analysis and Applications
- Advanced Neuroimaging Techniques and Applications
- Electrical and Bioimpedance Tomography
- Children's Physical and Motor Development
- Polymer Nanocomposites and Properties
- Radio Frequency Integrated Circuit Design
Universidad Autónoma de Madrid
2023-2025
Universidad Nacional Autónoma de México
2015-2023
Cuban Neuroscience Center
2010-2023
Montreal Neurological Institute and Hospital
2019-2023
McGill University
2019-2023
University of Electronic Science and Technology of China
2019-2023
Instituto Nacional de Neurología y Neurocirugía
2018-2019
Institute of Neurobiology
2015-2018
Autonomous University of Queretaro
2018
National Institute for Physiological Sciences
2012-2015
There is much current interest in identifying the anatomical and functional circuits that are basis of brain's computations, with hope neuroimaging techniques will allow vivo study these neural processes through statistical analysis time-series they produce. Ideally, use such as multivariate autoregressive (MAR) modelling should identification effective connectivity by combining graphical methods concept Granger causality. Unfortunately, perform well only for case length Nt larger than p ,...
Evoked potentials to brief 1,000-Hz tones presented either the left or right ear were recorded from 30 electrodes arrayed over head. These recordings submitted two different forms of source analysis: brain electric analysis (BESA) and variable-resolution electromagnetic tomography (VARETA). Both analyses showed that dominant intracerebral sources for late auditory-evoked (50-300 ms) in supratemporal plane lateral temporal lobe contralateral stimulation. The also suggested possibility...
This article describes a new method for 3D QEEG tomography in the frequency domain. A variant of Statistical Parametric Mapping is presented source log spectra. Sources are estimated by means Discrete Spline EEG inverse solution known as Variable Resolution Electromagnetic Tomography (VARETA). Anatomical constraints incorporated use Montreal Neurological Institute (MNI) probabilistic brain atlas. Efficient methods developed domain VARETA order to estimate spectra set 10(3)-10(5) voxels that...
During a dyadic social interaction, two individuals can share visual attention through gaze, directed to each other (mutual gaze) or third person an object (joint attention). Shared is fundamental face-to-face but how shared, retained, and neutrally represented in pair-specific manner has not been well studied. Here, we conducted two-day hyperscanning functional magnetic resonance imaging study which pairs of participants performed real-time mutual gaze task followed by joint on the first...
The Cuban Human Brain Mapping Project (CHBMP) repository is an open multimodal neuroimaging and cognitive dataset from 282 young middle age healthy participants (31.9 ± 9.3 years, range 18-68 years). This was acquired 2004 to 2008 as a subset of larger stratified random sample 2,019 La Lisa municipality in Habana, Cuba. exclusion criteria included the presence disease or brain dysfunctions. Participant data that being shared comprises i) high-density (64-120 channels) resting-state...
Cognitive and brain hyperactivation have been associated with trouble falling asleep sleep misperception in patients primary insomnia (PI). Activation synchronization/temporal coupling frontal frontoparietal regions involved executive control endogenous attention might be implicated these symptoms.
This paper extends frequency domain quantitative electroencephalography (qEEG) methods pursuing higher sensitivity to detect Brain Developmental Disorders. Prior qEEG work lacked integration of cross-spectral information omitting important functional connectivity descriptors. Lack geographical diversity precluded accounting for site-specific variance, increasing nuisance variance. We ameliorate these weaknesses. (i) Create lifespan Riemannian multinational norms tensors. These result from...
The maturation of electroencephalogram (EEG) effective connectivity in healthy infants during the first year life is described. Participants: A cross-sectional sample 125 at-term infants, from 0 to 12 months age, underwent EEG a state quiet sleep. Procedures: primary currents at source were described with sLoreta method. An unmixing algorithm was applied reduce leakage, and isolated coherence, direct directed measurement information flow, calculated. Initially, highest indices are...
This article reviews the contributions of Cuban Neuroscience Center to evolution statistical parametric mapping (SPM) quantitative Multimodal Neuroimages (qMN), from its inception more recent work. Attention is limited methods that compare individual qMN normative databases (n/qMN). described in three successive stages: (a) development one variant topographical EEG (n/qEEG-top) which carries out comparison spectral topographies with regard a database--as part now popular SPM brain...
Protein Energy Malnutrition (PEM) has lifelong consequences on brain development and cognitive function. We studied the developmental trajectories of resting-state EEG source activity in 66 individuals with histories limited to first year life 83 matched classmate controls (CON) who are all participants 49 years longitudinal Barbados Nutrition Study (BNS). qEEGt z-spectra measured deviation from normative values rhythmic sources at 5–11 age 40 later 45–51 age. The PEM group showed...
Reading is essentially a two-channel function, requiring the integration of intact visual and auditory processes both peripheral central. It essential for normal reading that these component go forward automatically. Based on this model, Boder described three main subtypes dyslexia: dysphonetic dyslexia (DD), dyseidetic, mixed besides fourth group defined non-specific delay (NSRD). The are identified by an algorithm considers quotient % errors in spelling test. Chiarenza Bindelli have...
Learning disorders (LDs) are diagnosed in children whose academic skills of reading, writing or mathematics impaired and lagging according to their age, schooling intelligence. Children with LDs experience substantial working memory (WM) deficits, even more pronounced if than one the is affected. We compared task-related electroencephalogram (EEG) power spectral density (n = 23) a control group good achievement 22), during performance WM task. sLoreta was used estimate current distribution...
Abstract Current findings show some brain regions consistently related to performance of the Wisconsin Card Sorting Test (WCST). An increase local cerebral blood flow or metabolic demands has been detected in those regions. Functional integration neuronal circuits that subserve task performance, based upon identification oscillations and their distributed sources, not accomplished previously. The event‐related tonic within a period 2,000 msec after stimulus onset probable neural substrate...
Electroencephalographic alterations have been reported in subjects with learning disorders, but there is no consensus on what characterizes their electroencephalogram findings. Our objective was to determine if were subgroups within a group of scholars not otherwise specified disorders and they had specific electroencephalographic patterns. Eighty-five (31 female, 8–11 years) who scored low at least two subscales -reading, writing arithmetic- the Infant Neuropsychological Evaluation...
We provide an electroencephalographic (EEG) based statistical classifier that correctly identifies children with histories of Protein Energy Malnutrition (PEM) in the first year life and distinguished them from controls 0.82% accuracy (area under ROC curve). Our previous result same participants achieved equivalent but was on scalp quantitative EEG features which precluded anatomical interpretation. In contrast, we now employ BC-VARETA, a novel high-resolution source imaging method minimal...
Identifying the functional networks underpinning indirectly observed processes poses an inverse problem for neurosciences or other fields. A solution of such problems estimates as a first step activity emerging within from EEG MEG data. These are direct reflection brain network with temporal resolution that no in vivo neuroimage may provide. second estimating connectivity pseudodata unveil oscillatory strongly correlate all cognition and behavior. Simulations also reveal estimation errors...
Recent neuroimaging studies show that brain abnormalities in neuromyelitis optica (NMO) are more frequent than earlier described. Yet, research considering multiple aspects of NMO is necessary to better understand these abnormalities. A clinical feature relapsing (RNMO) the incremental disability attack-related. Therefore, association between attack-related process and might be expected. On other hand, immunopathological analysis lesions has suggested CNS microvasculature could an early...
The goal of this study is to identify the quantitative electroencephalographic (qEEG) signature early childhood malnutrition [protein-energy (PEM)]. To end, archival digital EEG recordings 108 participants in Barbados Nutrition Study (BNS) were recovered and cleaned artifacts (46 children who suffered an episode PEM limited first year life) 62 healthy controls). still ongoing BNS initially enrolled 1973, EEGs for both groups recorded 1977-1978 (at 5-11 years). Scalp source Z-spectra (to...