Angel V. Peterchev

Variability and Landmark Quality in Anatomical Co-Registration in Neuronavigation for Brain Stimulation

This study quantifies variability in anatomical landmark localization during neuronavigation, showing operator- and landmark-specific differences and the impact of marking on inter-operator agreement.

Computational investigation of circuit mechanisms underlying short-latency responses to cortical stimulation

The paper uses computational models of cortical circuits to investigate the mechanisms behind D- and I-wave responses to cortical stimulation, finding consistent patterns across different cortical regions.

Variants of relative frequency methods for determining transcranial magnetic stimulation motor threshold do not provide accurate estimation of threshold

This paper shows that variants of relative frequency methods for TMS motor thresholding are inaccurate and slow, recommending instead stochastic approximation or maximum likelihood estimation.

Acute Increase of Excitatory Activity in Pyramidal Neurons of Rat Motor Cortex under Static Magnetic Field

This study investigates the acute effects of static magnetic fields on excitatory synaptic activity in rat motor cortex neurons using patch-clamp recordings.

Amplitude-Modulated Kilohertz Stimulation Targeting Beta-Band Activity Disrupts Motor Learning

This study uses amplitude-modulated kilohertz transcranial magnetic perturbation to test the role of beta and delta oscillations in human motor learning, finding that beta stimulation impairs performance.

Histologically Informed Multiscale Modeling of the Neuronal Elements Activated by TMS

The paper uses histological data and computational models to identify myelinated axon bends as potential targets for TMS, showing they have physiologically realistic activation thresholds.

Understanding the mechanisms of lateral parietalmemory modulation in Mild Cognitive Impairment

This study investigates how transcranial magnetic stimulation (TMS) improves memory in Mild Cognitive Impairment by modulating semantic representations in parietal cortex and hippocampus.

High-Power Dual-Channel Chamber for High-Frequency Magnetic Neuromodulation

This paper introduces a dual-channel magnetic chamber for high-frequency magnetic neuromodulation in mice, capable of generating two independent magnetic fields with minimal interference and real-time behavioral monitoring.

Kilohertz Transcranial Magnetic Perturbation (kTMP): A New Non-invasive Method to Modulate Cortical Excitability

This paper introduces and evaluates kilohertz transcranial magnetic perturbation (kTMP), a non-invasive method that increases cortical excitability through subthreshold electric fields.

Single pointwise samples of electric field on a neuron model cannot predict activation threshold by brain stimulation

The paper shows that single pointwise E-field samples cannot predict neural activation thresholds, as thresholds depend on spatial integration of the E-field along the neural cable.

Practical TMS coils with maximum focality and various stimulation depths

This paper designs and validates focal-deep TMS (fdTMS) coils that improve spatial targeting precision and depth of electric field stimulation compared to conventional figure-8 coils.

Distinct impacts of sodium channel blockers on the strength-duration properties of human motor cortex neurones

This study examines how sodium channel blockers affect the strength-duration properties of human motor cortex neurons using TMS, revealing distinct effects between carbamazepine and lacosamide.

Optimal Frequency for Seizure Induction with Electroconvulsive Therapy and Magnetic Seizure Therapy

This study identifies the optimal frequency for seizure induction in ECT and MST to minimize stimulus intensity and potential adverse effects.

Magnetic activation of electrically active cells

This paper demonstrates that spiking HEK cells can respond to magnetic fields by generating action potentials through mechanoreception pathways, without requiring synthetic nanoparticles or other co-factors.

Circuits and mechanisms for TMS-induced corticospinal waves: Connecting sensitivityanalysis to the network graph

The paper develops a computational model of motor cortex using human recordings to analyze TMS-induced corticospinal waves and identifies key neural pathways and mechanisms.

Reduced Auditory Perception and Brain Response with Quiet TMS Coil

This study compares the stimulation strength, perceived loudness, and EEG response between a quiet TMS coil (qTMS-DCC) and a conventional TMS coil, finding the qTMS-DCC is quieter and produces smaller auditory-evoked potentials.

Using Dual-Coil TMS-EEG to Probe Bilateral Brain Mechanisms in Healthy Aging and Mild Cognitive Impairment

This study uses dual-coil TMS-EEG to investigate bilateral brain mechanisms in healthy aging and mild cognitive impairment, finding frequency-specific responses to bilateral rTMS.

TAP: Targeting and analysis pipeline for optimization and verification of coil placement in transcranial magnetic stimulation

TAP optimizes and verifies transcranial magnetic stimulation coil placement using individualized head models and MRI data to improve targeting accuracy and E-field control.

Characterizing the short-latency evoked response to intracortical microstimulation across a multi-electrode array

The paper characterizes the short-latency neural responses to intracortical microstimulation using a multi-electrode array and describes the temporal dynamics of evoked activity.

Concurrent fMRI demonstrates propagation of TMS effects across task-related networks

This study uses concurrent fMRI and TMS to show that increasing TMS intensity alters functional connectivity between visual and non-visual networks, affecting motion discrimination performance.

Detection of Motor-Evoked Potentials Below the Noise Floor: Rethinking the Motor Threshold

This paper introduces a new method to detect motor-evoked potentials below the conventional noise floor, revealing that responses can be evoked at lower stimulation levels than previously thought.

Structural controllability predicts functional patterns and neuromodulatory benefits associated with working memory

This paper shows that structural controllability predicts working memory benefits from brain stimulation and correlates with functional modulation of memory demand.

Dose-dependent enhancement of motion direction discrimination with transcranial magnetic stimulation of visual cortex

This study investigates how different intensities and timings of TMS affect visual perception and brain activity, finding that lower intensities can enhance performance.

Application of long-interval paired-pulse transcranial magnetic stimulation to motion-sensitive visual cortex does not lead to changes in motion perception

This study applies long-interval paired-pulse TMS to motion-sensitive visual cortex but finds no changes in motion perception.

Site-specific effects of online rTMS during a working memory task in healthy older adults.

This study tests if online rTMS improves working memory in older adults, finding it instead decreases accuracy in high-demand tasks.

Sound comparison of seven TMS coils at matched stimulation strength

The paper compares the sound levels of seven TMS coils at matched stimulation strength, finding significant variation in sound pressure levels and recommending hearing protection.

Accuracy of robotic coil positioning during transcranial magnetic stimulation

This study evaluates the accuracy and stability of a robotic TMS coil positioning system, finding low initial error but increasing error over time.

Transcranial Alternating Current Stimulation (tACS) Entrains Alpha Oscillations by Preferential Phase Synchronization of Fast-Spiking Cortical Neurons to Stimulation Waveform

This study shows tACS entrains alpha oscillations by preferentially synchronizing fast-spiking cortical neurons to the stimulation waveform in ferrets.

A systematic study of repetitive transcranial magnetic stimulation to enhance working memory manipulation abilities

This study investigates whether 5Hz rTMS over the left DLPFC improves working memory manipulation accuracy, finding no significant overall effect but a negative correlation between fMRI activity and behavioral improvement in the hardest condition.