Transcutaneous vagus nerve stimulation (tVNS)

Transcutaneous vagus nerve stimulation (tVNS) has been investigated for its effects on various aspects of brain function, including the internal clock or timing processes. Stay with us in the rest of this article.

1. Response Selection and Implicit Sequence Learning :

• tVNS has been shown to enhance response selection during sequential actions.
• It may alter cortical excitability and synaptic plasticity, potentially through modulation of m brain GABA concentration
• GABA plays a role in a “winner-takes-all” mechanism, aiding in the suppression of incorrect responses and selection of the appropriate response¹.

2. Associative Memory Formation:

• tVNS has been associated with improved associative memory .
• When responses follow an implicit sequential structure, associative memory allows for integrated representation of the sequence.
• The presumed increase in noradrenaline (NA) transmission from the locus coeruleus to hippocampal areas may contribute to this effect¹.

3. Post-Error Slowing:

• Post-error slowing is crucial for sequence learning.
• tVNS has been reported to increase post-error slowing, which depends on dopamine activity.
• Enhanced post-error slowing reflects rule-based performance and contributes to sequence learning¹.

4. Safety and Convenience:

• tVNS is safe and convenient, with only minor side effects reported.
• However, the exact mechanism of action remains unclear, and robustness of results requires further investigation².

In summary, tVNS holds promise for modulating internal timing processes, but more research is needed to fully understand its effects and optimize its clinical applications.

(1) Frontiers | Transcutaneous Vagus Nerve Stimulation (tVNS) Enhances …. 

(2) Frontiers | Critical Review of Transcutaneous Vagus Nerve Stimulation …. 

(3) Brain Sciences | Free Full-Text | Effects of Stimulus Frequency … – MDPI.