A5075889585- Neural dynamics and brain function
- Functional Brain Connectivity Studies
- Visual perception and processing mechanisms
- EEG and Brain-Computer Interfaces
- Face Recognition and Perception
- Hearing Loss and Rehabilitation
- Neuroscience and Music Perception
- Blind Source Separation Techniques
- Speech and Audio Processing
- Neural Networks and Applications
- Neural and Behavioral Psychology Studies
- Retinal Development and Disorders
- Advanced MRI Techniques and Applications
- CCD and CMOS Imaging Sensors
- Electromagnetic Fields and Biological Effects
- Neuroscience, Education and Cognitive Function
- Multisensory perception and integration
- Visual Attention and Saliency Detection
- Face recognition and analysis
- Cardiac electrophysiology and arrhythmias
- Cardiac Fibrosis and Remodeling
- Traumatic Brain Injury and Neurovascular Disturbances
- Nonlinear Optical Materials Research
- Advanced MEMS and NEMS Technologies
- Advanced Adaptive Filtering Techniques
University of Zagreb
2008-2019
Sapienza University of Rome
2015
Los Alamos National Laboratory
1989-1995
Numerical simulation studies were performed using a multiple-dipole source model and spherical approximation of the head to determine how resolution simultaneously active neuromagnetic sources depends on modeling assumptions (i.e., number assumed dipoles), actual parameters (e.g., location, orientation, moment), measurement errors. Forward calculations made for series configurations in which dipoles, specific dipole parameters, noise levels systematically varied. Simulated noisy field...
We present the four key areas of research-preprocessing, volume conductor, forward problem, and inverse problem-that affect performance EEG MEG source imaging. In each area we identify prominent approaches methodologies that have open issues warranting further investigation within community, challenges associated with certain techniques, algorithms necessitating clarification their implications. More than providing definitive answers aim to important in quest localization.
Retinotopic mapping strategies similar to those used for invasive electrophysiological studies identify multiple visual areas in monkeys have been adapted noninvasive humans, using magnetic recordings of brain activity conjunction with anatomical resonance imaging. The retinotopic organization the primary area (V1) left hemisphere human subjects was examined by presenting small patterned stimuli near vertical and horizontal meridians lower right field. In contrast classical model V1...
Results are reviewed from several neuromagnetic studies which characterize the temporal dynamics of neural sources contributing to visual evoked response and effects attention on these sources. Different types pattern-onset stimuli (<2°) were presented sequentially a number field locations in right field. Multiple dipole models applied sequence instantaneous distributions constructed at 10 ms intervals. Best-fitting source parameters superimposed Magnetic Resonance images (MRI) each subject...
Magnetoencephalography (MEG), a direct measure of neuronal activity, is an underexplored tool in the search for biomarkers Alzheimer's disease (AD). In this study, we used MEG source estimates auditory gating generators, nonlinear correlations with neuropsychological results, and multivariate analyses to examine sensitivity specificity topology modulation detect AD. Our results demonstrated use localization medial prefrontal (mPFC) generator as discrete (binary) detector AD at individual...
Numerical simulations were conducted to examine multi-source spatio-temporal resolution for neuromagnetic field distributions "measured" by a large sensor array (i.e., 135). generated series of two-dipole and three-dipole configurations in which source locations, orientations, temporal dynamics individual sources systematically varied represent classes cases interest studies. The specific goals our numerical parameter estimation accuracy as function 1) configurations; 2) different time...
Abstract The early dissociation in cortical responses to faces and objects was explored with magnetoencephalographic (MEG) recordings source localization. To control for differences the low‐level stimulus features, which are known modulate brain responses, we created a novel set of stimuli so that their combinations did not have any visual‐field location, spatial frequency, or luminance contrast. Differing face object (flower) were found at about 100 ms after onset occipital cortex. Our data...
The present work aims to investigate the electroencephalographic (EEG) activity elicited by observation of emotional pictures selected from International Affective Picture System (IAPS) database. We analyzed evoked within time intervals increasing duration taking into account related ratings Valence and Arousal. scalp statistical maps Power Spectral Density (PSD), with high valence, revealed an enhanced across frontal areas in theta band involvement fronto-parietal circuits alpha band....
Abstract Detection of a change in face is socially important skill. Both event-related potential (ERP) and magnetoencephalographic (MEG) measurements were conducted using stimuli presented an oddball paradigm to investigate detection identity facial expression. In condition 1, nontarget deviant neutral was among standard happy faces. 2, the same with another person. The task both conditions silent counting second (face glasses). Non-target deviants elicited more negative ERP corresponding...
Communication sounds are typically asymmetric in time and human listeners highly sensitive to this short-term temporal asymmetry. Nevertheless, causal neurophysiological correlates of auditory perceptual asymmetry remain largely elusive our current analyses models. Auditory modelling animal electrophysiological recordings suggest that results from the presence multiple scales integration, central periphery. To test hypothesis we recorded evoked fields (AEF) elicited by humans. We found a...