Results 61 to 70 of about 1,862 (168)

Characterizing atomic magnetic gradiometers for fetal magnetocardiography

Review of Scientific Instruments, 2019
Atomic magnetometers (AMs) offer many advantages over superconducting quantum interference devices due to, among other things, having comparable sensitivity while not requiring cryogenics. One of the major limitations of AMs is the challenge of configuring them as gradiometers.
I. A. Sulai, Z. J. DeLand, M. D. Bulatowicz, C. P. Wahl, R. T. Wakai, T. G. Walker   +5 more
openaire   +4 more sources

Sleep magnetoencephalography enhances detection and source imaging of seizures and fast oscillations in focal cortical dysplasia

Epilepsia, Volume 67, Issue 6, Page 2992-3008, June 2026.
Abstract Objective Focal cortical dysplasia (FCD) causes drug‐resistant epilepsy requiring presurgical evaluation. Invasive electroencephalographic (EEG) studies demonstrate that sleep modulates epileptic activity, including interictal epileptiform discharges (IEDs), fast oscillations (FOs) in the beta (14–40 Hz) and gamma (40–80 Hz) frequency bands ...
Marcel Heers, Jawata Afnan, Christoph Braun, Christophe Grova, Dirk‐Matthias Altenmüller, Bernhard J. Steinhoff, Matthias Dümpelmann, Theo Demerath, Horst Urbach, Silke Ethofer, Markus Siegel, Andreas Schulze‐Bonhage, Holger Lerche, Yiwen Li Hegner   +13 more
wiley   +1 more source

Thalamic connectivity mirrors spatial maps of network dysfunction in nonlesional focal epilepsy

Epilepsia, Volume 67, Issue 6, Page 3023-3033, June 2026.
Abstract Objective Focal epilepsy is increasingly conceptualized as a network disorder, yet the extent to which network dysfunction reflects a shared phenotype remains unknown. Spatially conserved patterns of network dysfunction may implicate a centralized mechanism underlying widespread impairment.
Joline M. Fan, Ehsan Tadayon, Kiwamu Kudo, Kamalini G. Ranasinghe, Anne M. Findlay, Robert C. Knowlton, Vikram R. Rao, Srikantan S. Nagarajan   +7 more
wiley   +1 more source

Modulation of Visual Contrast Perception Associated With Dorsal Attention Network Connectivity Assessed by Magnetoencephalography

Human Brain Mapping, Volume 47, Issue 8, June 1, 2026.
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 ...
Alfredo L. Sklar, Brian A. Coffman, Fran López‐Caballero, Dylan Seebold, Jenay Kocsis, Lauren Fowler, Hayley Rhorer, Jack Kavanagh, Dean F. Salisbury   +8 more
wiley   +1 more source

Design of an Integrated MEMS Magnetic Gradiometer Rejecting Vibrations and Stray Fields

IEEE Journal of the Electron Devices Society
Magnetic sensors are often used near current-carrying wires or electrical motors generating significant magnetic interference. To mitigate the effects of these stray fields, the traditional design approach relies on a differential sensing scheme ...
Enrico Gasparin, Arno Hoogerwerf, Dara Bayat, Guido Spinola Durante, Yves Petremand, Maurizio Tormen, Michel Despont, Gael Close   +7 more
doaj   +1 more source

A compact unshielded optically pumped magnetic gradiometer

Review of Scientific Instruments
Optically pumped magnetic gradiometers (OPG) play a crucial role in applications such as magnetic anomaly detection and biomagnetic measurements. This study classifies current OPG into four types based on their differential modes: voltage, frequency, optical rotation, and magnetic field differential modes.
Hangfei Ye, Chenlu Xu, Min Hu, Haifeng Dong   +3 more
openaire   +3 more sources

sBOSC: A Method for Source‐Level Identification of Neural Oscillations in Electromagnetic Brain Signals

Psychophysiology, Volume 63, Issue 6, June 2026.
ABSTRACT Neural oscillations are recognized as a fundamental component of brain electromagnetic activity. They are implicated in a wide range of cognitive processes and proposed as a core mechanism for brain communication. Nonetheless, detecting genuine neural oscillations remains a methodological challenge, particularly due to the difficulty of ...
Enrique Stern, Guiomar Niso, Almudena Capilla   +2 more
wiley   +1 more source

Functional Connectivity Linked to Cognitive Recovery After Minor Stroke

Annals of Clinical and Translational Neurology, Volume 13, Issue 5, Page 888-898, May 2026.
ABSTRACT Objective Patients with minor stroke exhibit slowed processing speed and generalized alterations in functional connectivity involving frontoparietal cortex (FPC). The pattern of connectivity evolves over time. In this study, we examine the relationship of functional connectivity patterns to cognitive performance, to determine ...
Vrishab Commuri, Isabella Dallasta, Ciaran Stone, Sophia Girgenti, Neda Gould, Rafael H. Llinas, Jonathan Z. Simon, Elisabeth Breese Marsh   +7 more
wiley   +1 more source

High Resolution Marine Magnetic Survey of Shallow Water Littoral Area

Sensors, 2007
The purpose of this paper is to present a system developed for detection andaccurate mapping of ferro-metallic objects buried below the seabed in shallow waters.
Jacob Sharvit, Nizan Salomonski, Roger Alimi, Hovav Zafrir, Tsuriel Ram Cohen, Boris Ginzburg, Eyal Weiss   +6 more
doaj   +1 more source

Selective Modulation of Evidence Accumulation by Hippocampal Theta Oscillations During Mnemonic Decision‐Making

Human Brain Mapping, Volume 47, Issue 7, May 2026.
Hippocampal theta power during memory retrieval predicts evidence accumulation in a mnemonic similarity task. Trial‐level MEG signals were integrated with a linear ballistic accumulator model, revealing that theta oscillations modulate decision dynamics, linking neural variability to memory‐based discrimination performance.
Pei L. Robins, Jessica R. Gilbert, Bruce Luber, Nadia Mustafa, Eesha Bharti, Jeffrey D. Stout, Frederick W. Carver, Zhi‐De Deng   +7 more
wiley   +1 more source