Alexander Thomas Sack

Predictable Timing Enhances the Use of Predictable Content

The paper investigates how predictable timing and content in sequences interact, finding that predictable timing enhances the use of predictable content in prediction tasks.

tACS induces state-dependent shifts in inhibitory phase preference consistent with phase precession

This paper shows that tACS can shift inhibitory phase preference during motor inhibition in a state-dependent manner, consistent with phase precession.

Closed-loop phase-locked EEG-tACS enables adaptive control of cortical beta synchrony and motor control

This study uses closed-loop EEG-tACS to adaptively control cortical beta synchrony and motor control, finding that anti-phase stimulation suppresses beta synchrony and impairs motor inhibition.

The cardiac, respiratory, and gastric rhythms independently modulate motor corticospinal excitability in humans

This study investigates how cardiac, respiratory, and gastric rhythms independently modulate motor corticospinal excitability in humans using transcranial magnetic stimulation.

In-phase and anti-phase dual-site beta tACS differentially influence functional connectivity and motor inhibition

This study uses dual-site beta tACS to manipulate phase relationships between the rIFG and M1, showing that in-phase stimulation increases connectivity and improves inhibitory control, while anti-phase decreases connectivity and speeds go responses.

Using TMS-EEG to study the intricate interplay between GABAergic inhibition and glutamatergic excitation during reactive and proactive motor inhibition

This study uses TMS-EEG to examine how GABAergic and glutamatergic neurotransmission contributes to reactive and proactive motor inhibition by analyzing TEP components in M1 and preSMA.

The phase of tACS-entrained pre-SMA beta oscillations modulates motor inhibition

This study shows that the phase of beta oscillations in pre-SMA modulates motor inhibition, with better performance when stop signals align with the trough of the oscillation.

Assessing TMS-evoked cognitive network responses depending on neurocognitive and oscillatory brain state: A simultaneous TMS-EEG-fMRI project

This study examines TMS-evoked fMRI responses under different neurocognitive and oscillatory brain states using simultaneous TMS-EEG-fMRI, finding state-independent responses in sensory areas and state-dependent effects on indirect TMS effects.

Alpha Oscillatory Activity Causally Linked to Working Memory Retention: Insights from Online Phase-corrected Closed-loop Transcranial Alternating Current Stimulation (tACS)

This study uses phase-corrected tACS to show that parietal alpha oscillations causally affect working memory retention.

Transcranial alternating current stimulation at theta frequency to the parietal cortex impairs associative, but not perceptual, memory encoding

Reduced risk-taking behavior during frontal oscillatory theta band neurostimulation

This study shows that theta-band tACS over the prefrontal cortex reduces risk-taking behavior, with no effect from gamma-band or sham stimulation.

Transcranial Magnetic stimulation (TMS) modulates functional activity of SH-SY5Y cells: An in vitro model provides support for assumed excitability changes

The paper applies rTMS to SH-SY5Y cells to study its effects on neural activity using live calcium imaging, finding opposing effects of iTBS and cTBS on depolarization response.

Frequency-specific transcranial neuromodulation of oscillatory alpha power alters and predicts human visuospatial attention performance

This study shows that tACS at individual alpha frequency alters alpha power and predicts visuospatial attention bias, supporting synchronization theory.

Does alpha phase modulate visual target detection? Three experiments with tACS phase-based stimulus presentation.

The paper investigates whether alpha phase modulates visual target detection using tACS phase-based stimulus presentation across three experiments, finding no consistent sinusoidal pattern in performance but suggesting phase effects on reaction times.

Can processing of face trustworthiness bypass early visual cortex? A transcranial magnetic stimulation masking study

This study investigates whether face trustworthiness processing bypasses early visual cortex using TMS, finding that conscious perception relies on EVC while forced-choice judgments may not.

Left parietal tACS at alpha frequency induces a shift of visuospatial attention

This study applies tACS at alpha frequency to the left parietal cortex and finds it increases leftward attention bias in an endogenous task but not in exogenous or stimulus detection tasks.

Faded visual afterimages reappear after TMS over early visual cortex

This study uses TMS over early visual cortex to reverse visual fading of perceived hands, suggesting inhibitory processes in EVC can be modulated.

How Transcranial Magnetic Stimulation over Early Visual Cortex impacts short-term memory precision and guess rate

This study investigates how transcranial magnetic stimulation (TMS) over early visual cortex affects short-term memory precision and guess rate, finding enhanced memory precision at targeted retinotopic locations and increased guessing with early TMS pulses.