Brain Vital Signs Detect Information Processing Differences When Neuromodulation Is Used During Cognitive Skills...

Area of Science:

• Neuroscience
• Cognitive Science
• Biomedical Engineering

Background:

• Neuromodulation, including translingual neurostimulation (TLNS), induces neuroplasticity and long-lasting neuronal reorganization.
• Non-invasive TLNS, utilizing the Portable Neuromodulation Stimulator (PoNS) device, stimulates cranial nerves V and VII via the tongue.
• Previous studies noted incidental cognitive improvements, prompting objective investigation.

Purpose of the Study:

• To investigate the effects of TLNS on the N400 brain vital sign during cognitive skills training in healthy individuals.
• To objectively assess TLNS's impact on cognitive processing and attention.

Main Methods:

• Thirty-seven healthy volunteers were randomized into TLNS treatment and control groups.
• Participants underwent 3 days of cognitive training with two 20-min sessions daily.
• Brain vital signs, specifically N400 amplitude and latency, were measured at baseline, Day 1, and Day 3.

Main Results:

• The control group showed a significant decrease in N400 amplitude due to habituation (p=0.028).
• The TLNS treatment group exhibited no significant change in N400 amplitude, indicating a sustained response.
• This suggests TLNS modulated the learning effect during cognitive training.

Conclusions:

• TLNS maintained a sustained N400 response, indicating preserved cognitive processing during training.
• Findings suggest TLNS enhances attention and cognitive vigilance through neuromodulation.
• The brain's vital signs framework effectively measured TLNS-induced differential learning effects.