Results 51 to 60 of about 2,513,775 (186)

Optimising the sensing volume of OPM sensors for MEG source reconstruction

NeuroImage, 2022
Magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) has been hailed as the future of electrophysiological recordings from the human brain.
Yulia Bezsudnova, Lari M. Koponen, Giovanni Barontini, Ole Jensen, Anna U. Kowalczyk   +4 more
doaj   +1 more source

Moving magnetoencephalography towards real-world applications with a wearable system [PDF]

, 2018
Imaging human brain function with techniques such as magnetoencephalography1 (MEG) typically requires a subject to perform tasks whilst their head remains still within a restrictive scanner. This artificial environment makes the technique inaccessible to
A Borna, A Mary, BD Van Veen, C Johnson, CN Johnson, D Cohen, E Boto, EL Barratt, Elena Boto, G Pfurtscheller, Gareth R. Barnes, GE Backus, Gillian Roberts, IK Kominis, J Dupont-Roc, J Gross, J Sarvas, J Vrba, James Leggett, JC Allred, JF Hipp, JW Carlson, K Jerbi, K Kamada, K Kim, K Yoda, Karen J. Mullinger, Leonardo Duque Muñoz, M Poole, Matthew J. Brookes, MJ Brookes, MJ Brookes, MS Hämäläinen, Niall Holmes, O Alem, O Alem, PJ Uhlhaas, Richard Bowtell, S Baillet, SE Robson, Sofie S. Meyer, Sven Bestmann, Tim M. Tierney, V Shah, Vishal Shah, VK Shah, W Gaetz   +46 more
core   +4 more sources

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

An Iterative Implementation of the Signal Space Separation Method for Magnetoencephalography Systems with Low Channel Counts [PDF]

, 2023
The signal space separation (SSS) method is routinely employed in the analysis of multichannel magnetic field recordings (such as magnetoencephalography (MEG) data).
Bowtell, Richard, Brookes, Matthew J, Holmes, Niall, Taulu, Samu   +3 more
core   +2 more sources

Measuring the cortical tracking of speech with optically-pumped magnetometers [PDF]

, 2021
During continuous speech listening, brain activity tracks speech rhythmicity at frequencies matching with the repetition rate of phrases (0.2-1.5 Hz), words (2-4 Hz) and syllables (4-8 Hz).
Boto, Elena, Bourguignon, Mathieu, Bowtell, Richard, Brookes, Matthew J., de Lange, Paul, De Tiège, Xavier, Hill, Ryan M., Holmes, Niall, Wens, Vincent   +8 more
core   +3 more sources

Simultaneous whole-head electrophysiological recordings using EEG and OPM-MEG. [PDF]

Imaging Neurosci (Camb)
Abstract Electroencephalography (EEG) and magnetoencephalography (MEG) non-invasively measure human brain electrophysiology. They differ in nature; MEG offers better performance while EEG (a wearable platform) is more practical. They are also complementary, with studies showing that concurrent MEG/EEG provides advantages over either ...
Seedat ZA, Pier KS, Holmes N, Rea M, Al-Hilaly L, Tierney TM, Embury CM, Pardington R, Mullinger KJ, Cross JH, Boto E, Brookes MJ.   +11 more
europepmc   +3 more sources

Sensor array design of optically pumped magnetometers for accurately estimating source currents

NeuroImage, 2023
An optically pumped magnetometer (OPM) is a new generation of magnetoencephalography (MEG) devices that is small, light, and works at room temperature. Due to these characteristics, OPMs enable flexible and wearable MEG systems.
Yusuke Takeda, Tomohiro Gomi, Ryu Umebayashi, Sadamu Tomita, Keita Suzuki, Nobuo Hiroe, Jiro Saikawa, Tatsuya Munaka, Okito Yamashita   +8 more
doaj   +1 more source

Performance Analysis of Optically Pumped ⁴He Magnetometers vs. Conventional SQUIDs: From Adult to Infant Head Models

Sensors, 2022
Optically pumped magnetometers (OPMs) are new, room-temperature alternatives to superconducting quantum interference devices (SQUIDs) for measuring the brain’s magnetic fields.
Saeed Zahran, Mahdi Mahmoudzadeh, Fabrice Wallois, Nacim Betrouni, Philippe Derambure, Matthieu Le Prado, Agustin Palacios-Laloy, Etienne Labyt   +7 more
doaj   +1 more source

Simultaneous whole-head electrophysiological recordings using EEG and OPM-MEG

, 2023
ABSTRACTElectroencephalography (EEG) and magnetoencephalography (MEG) non-invasively measure human brain electrophysiology. They differ in nature; MEG offers better performance (higher spatial precision) whilst EEG (a wearable platform) is more practical. They are also complementary, with studies showing that concurrent MEG/EEG provides advantages over
Seedat ZA, Pier KS, Holmes N, Rea M, Al-Hilaly L, Tierney TM, Pardington R, Mullinger KJ, Cross JH, Boto E, Brookes MJ.   +10 more
europepmc   +2 more sources

Magnetic field compensation coil design for magnetoencephalography [PDF]

, 2021
While optically pumped magnetometers (OPMs) can be attached to the head of a person and allow for highly sensitive recordings of the human magnetoencephalogram (MEG), they are mostly limited to an operational range of approximately 5 nT.
Doeller, C., Haueisen, J., Kutschka, H., Maess, B.   +3 more
core   +6 more sources