Results 21 to 30 of about 19,445 (231)

Cross-Axis projection error in optically pumped magnetometers and its implication for magnetoencephalography systems

NeuroImage, 2022
Optically pumped magnetometers (OPMs) developed for magnetoencephalography (MEG) typically operate in the spin-exchange-relaxation-free (SERF) regime and measure a magnetic field component perpendicular to the propagation axis of the optical-pumping ...
Amir Borna, Joonas Iivanainen, Tony R. Carter, Jim McKay, Samu Taulu, Julia Stephen, Peter D.D. Schwindt   +6 more
doaj   +1 more source

Modulation of Visual Contrast Perception Associated With Dorsal Attention Network Connectivity Assessed by Magnetoencephalography. [PDF]

Hum Brain Mapp
Magnetoencephalography was used to identify the impact of spatial attention on primary visual cortical responses to stimuli of varying contrast levels. Enhancement of the maximal response of the visual cortex to high contrast stimuli was associated with synchronous communication between the dorsal attention network and visual cortex within the alpha ...
Sklar AL, Coffman BA, López-Caballero F, Seebold D, Kocsis J, Fowler L, Rhorer H, Kavanagh J, Salisbury DF.   +8 more
europepmc   +2 more sources

Dynamic filtering of static dipoles in magnetoencephalography [PDF]

, 2013
We consider the problem of estimating neural activity from measurements of the magnetic fields recorded by magnetoencephalography. We exploit the temporal structure of the problem and model the neural current as a collection of evolving current ...
Aston, John A. D., John A. D. Aston, Johansen, Adam M., Thomas E. Nichols, Wilfrid S. Kendall, Adam M. Johansen, Kendall, W. S., Sorrentino, Alberto, Nichols, Thomas E.   +8 more
core   +1 more source

OMMR: Co-registration toolbox of OPM-MEG and MRI

Frontiers in Neuroscience, 2022
Magnetoencephalography (MEG) based on optically pumped magnetometers (OPM-MEG) has shown better flexibility in sensor configuration compared with the conventional superconducting quantum interference devices-based MEG system while being better suited for
Fuzhi Cao, Fuzhi Cao, Nan An, Nan An, Weinan Xu, Weinan Xu, Wenli Wang, Wenli Wang, Wen Li, Wen Li, Chunhui Wang, Chunhui Wang, Yanfei Yang, Yanfei Yang, Min Xiang, Min Xiang, Yang Gao, Yang Gao, Xiaolin Ning, Xiaolin Ning   +19 more
doaj   +1 more source

Magnetic Tunnel Junction Based Chip to Detect the Magnetic Field of Neuronal Signals: A Platform for In Vitro Studies

Proceedings, 2017
Magnetoencephalography (MEG) has revolutionized neuroscience, offering a tool with [...]
Daniela Moretti, Parikshit Pratim Sharma, Daniela Petti, Edoardo Albisetti, Riccardo Bertacco, Pietro Baldelli, Fabio Benfenati   +6 more
doaj   +1 more source

Cortical correlation structure of aperiodic neuronal population activity

NeuroImage, 2021
Electrophysiological population signals contain oscillatory and non-oscillatory aperiodic (1/frequency-like) components. So far research has largely focused on oscillatory activity, and only recently, interest in aperiodic population activity has gained ...
Andrea Ibarra Chaoul, Markus Siegel
doaj   +1 more source

Interactions between visual and semantic processing during object recognition revealed by modulatory effects of age of acquisition [PDF]

, 2013
The age of acquisition (AoA) of objects and their names is a powerful determinant of processing speed in adulthood, with early-acquired objects being recognized and named faster than late-acquired objects. Previous research using fMRI (Ellis et al., 2006.
Cornelissen, Piers, Wheat, Katherine, Woods, Will, Wheat, K.L., Simpson, M.I., Barca, Laura, Simpson, Michael, Cornelissen, P.L., Woods, W., Ellis, A.W., Urooj, U., Urooj, Uzma, Ellis, Andrew W., Barca, L.   +13 more
core   +1 more source

Magnetoencephalography in clinical practice

Arquivos de Neuro-Psiquiatria, 2022
Magnetoencephalography (MEG) is a neurophysiological technique that measures the magnetic fields associated with neuronal activity in the brain. It is closely related but distinct from its counterpart electroencephalography (EEG).
Mohamed HEGAZY, Jay GAVVALA
doaj   +1 more source

Regional coherence evaluation in mild cognitive impairment and Alzheimer's disease based on adaptively extracted magnetoencephalogram rhythms [PDF]

, 2011
This study assesses the connectivity alterations caused by Alzheimer's disease (AD) and mild cognitive impairment (MCI) in magnetoencephalogram (MEG) background activity.
Abasolo, Daniel, Hornero, R, Javier Escudero, Daniel Abásolo, Saeid Sanei, Sanei, S, Roberto Hornero, Sanei, Saeid, Escudero, Javier; id_orcid, Abásolo, D, Delaram Jarchi, Jarchi, Delaram, Hornero, Roberto, Escudero, J, Jarchi, D   +14 more
core   +1 more source

Deep brain activities can be detected with magnetoencephalography

Nature Communications, 2019
Magnetoencephalography (MEG) is a non-invasive method of measuring neural activity but the hippocampus and amygdala are difficult to measure with MEG because of their deep localization. Here, the authors show with simultaneous MEG and invasive recordings
Francesca Pizzo, N. Roehri, S. Medina Villalon, A. Trébuchon, S. Chen, S. Lagarde, R. Carron, M. Gavaret, B. Giusiano, A. McGonigal, F. Bartolomei, J. M. Badier, C. G. Bénar   +12 more
doaj   +1 more source