Apply to trial NCT06246942

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Physiology of Human Brain Connectivity

The purpose of this study is to investigate the effective connectivity between different regions of the human brain in healthy participants, and the mechanisms which influence and modulate its development. Specifically, the investigators will examine the effects of cortico-cortical paired associative stimulation (ccPAS) which is induced by the application of brief (\< 1 ms) transcranial magnetic stimulation (TMS) pulses separated by a short millisecond-level time intervals ("asynchrony") to two different areas of the brain. All techniques are non-invasive and considered safe in humans: TMS, electroencephalography (EEG), and magnetic resonance imaging (MRI). Based on previous animal and human studies, it is hypothesized that ccPAS will increase or decrease effective connectivity between the stimulated areas depending on the asynchrony value. The main outcome measure is source-resolved EEG cortico-cortical evoked potentials (ccEPs) elicited by single-pulse TMS.

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