George C. O’Neill

Intracranial Validation of Magnetoencephalography Across Oscillatory Frequency and Depth

This study validates MEG's ability to measure neural activity across frequency and depth using intracranial EEG data from epileptic patients, showing strong agreement for lower frequencies and superficial sources, and sensitivity to deep structures like the hippocampus.

Assessing the digit organisation of focal hand dystonia using 7T functional MRI

This study uses 7T fMRI to compare digit maps in FHD patients and healthy volunteers before and after BTX treatment, finding disordered maps in FHD patients and changes in pRF sizes post-treatment.

Measurement Equivalence of On-Scalp OPM-MEG and Cryogenic MEG for Auditory and Somatosensory Cortical Mapping Across Development

In 18 participants aged 10-45, OPM-MEG and SQUID-MEG placed auditory and somatosensory dipoles in the same cortical areas with matched latencies, differing by small systematic offsets and amplitude scaling.

Forward Modelling for Magnetospinography: Systematic Comparison of Boundary Element and Finite Element Methods

This study compares boundary element and finite element methods for forward modelling in magnetospinography, finding consistent results between methods but significant differences based on bone geometry representations.

The Cerebellum Implements an Oscillatory Forward Model for Accurate Motor Timing

The paper investigates cerebellar oscillatory activity during motor tasks and finds that cerebellar rhythms adjust their influence based on cue predictability.

Intrinsic electrophysiological activity maps a latent dimension of poor sleep quality and reduced cognitive performance: a magnetoencephalography study using Cam-CAN data.

The paper uses MEG data and a PLS approach to link poor sleep quality and cognitive performance to electrophysiological signatures, independent of age effects.

Volume conductor models for magnetospinography

This study compares volume conductor models to determine their impact on magnetic field predictions from spinal cord current flow.

Wearable MEG data recorded during human stepping

The paper presents a multimodal dataset of wearable MEG and EMG recordings during human stepping, validated with beta band desynchronization in the primary motor cortex.

Combining video telemetry and wearable MEG for naturalistic imaging

This paper combines video telemetry with wearable MEG to analyze naturalistic movement and neural activity during dance.

Non-invasive evidence for rhythmic interactions between the human brain, spinal cord, and muscle

The paper demonstrates non-invasive imaging of brain, spinal cord, and muscle interactions during movement using optically-pumped magnetometers.

Concurrent spinal and brain imaging with optically pumped magnetometers

This paper introduces a system for concurrent non-invasive imaging of brain and spinal cord electrophysiology using wearable optically pumped magnetometers.

Combining Magnetoencephalography with Telemetric Streaming of Intracranial Recordings and Deep Brain Stimulation - a Feasibility Study

This study tests the compatibility of telemetric LFP streaming with MEG in DBS patients, finding that Percept PC with SenSight leads generates limited interference and OPM systems are more resilient to artefacts.

Spatiotemporal organization of human sensorimotor beta burst activity

This study identifies spatiotemporal wave-like patterns of beta bursts in human sensorimotor cortex using magnetoencephalography, showing distinct propagation directions with different anatomical and physiological features.

Is high-frequency activity evidence of an anterior temporal lobe network or micro-saccades?

The paper investigates high-frequency brain activity in the temporal lobes using MEG data, finding a bilateral network but uncertainty about its origin.

Neural activity in human eyeblink conditioning: an optically pumped magnetometer-based MEG study

This study uses OP-MEG to detect cerebellar activity during human eyeblink conditioning, finding evoked responses that diminish with learning and occur before conditioned blinks.

Spherical harmonic based noise rejection and neuronal sampling with multi-axis OPMs

This paper evaluates noise rejection and spatial sampling in multi-axis OPMs using spherical harmonics and eigenspectra, finding triaxial configurations offer superior performance.

Using OPMs to measure neural activity in standing, mobile participants

This study demonstrates that OP-MEG can measure neural activity during significant head movements, including standing and large natural movements, with consistent auditory evoked fields.

Testing covariance models for MEG source reconstruction of hippocampal activity

The paper tests covariance models for MEG source reconstruction, finding that incorporating a correlated hippocampal source model improves model evidence.

Magnetic Field Mapping and Correction for Moving OP-MEG

This paper models and corrects magnetic field variations in moving OP-MEG data to reduce movement artefacts.

Pragmatic spatial sampling for wearable MEG arrays

This paper investigates the optimal number and placement of sensors in wearable MEG systems, showing that few sensors at coarse sampling can achieve adequate spatial discrimination under high SNR.

Modelling optically pumped magnetometerinterference as a mean (magnetic) field

The paper models magnetic interference in optically pumped magnetometers as a mean field to improve statistical power and reduce sensor variability.

Imaging human cortical responses to intraneural microstimulation using magnetoencephalography

The paper uses intraneural microstimulation combined with MEG to study cortical responses to touch afferents, finding consistent beta rhythm modulation in primary somatosensory cortex.

Detecting M/EEG modular brain states in rest and task

This paper introduces a framework to detect fast modular brain states during rest and task, validated on MEG and EEG data from healthy subjects and Parkinson's patients.