[Transcranial alternating current stimulation. Entrainment and function control of neuronal networks]

Area of Science:

• Neuroscience
• Neurophysiology
• Brain Stimulation Techniques

Context:

• Transcranial alternating current stimulation (tACS) is an emerging technique for modulating brain activity.
• It differs from other methods by applying a sinusoidal alternating current at specific frequencies.
• tACS allows for the manipulation of endogenous brain oscillations and associated cognitive functions.

Purpose:

• To investigate the potential of tACS in establishing causal links between brain oscillations and cognitive processes.
• To explore the clinical applications of tACS for various pathologies linked to specific brain oscillation frequencies.
• To understand the mechanisms behind persistent tACS effects, particularly neural plasticity.

Summary:

• tACS enables the modulation of brain oscillation amplitude and frequency, offering a tool to study causal relationships with cognitive functions.
• While neurocognitive studies have shown promise, clinical applications are still developing, with current research focusing on Parkinson's disease and tinnitus.
• Effective tACS requires careful selection of stimulation parameters (electrode placement, frequency, intensity, duration) and understanding post-stimulation effects.

Impact:

• tACS holds potential for evaluating causal relationships in neurocognitive research.
• It presents a promising avenue for therapeutic interventions in neurological and psychiatric disorders.
• Further research into neural plasticity is crucial for optimizing tACS efficacy and achieving persistent therapeutic benefits.