Stimulation-induced respiratory enhancement in corticothalamic regions

Area of Science:

• Neuroscience
• Neuromodulation
• Respiratory Physiology

Background:

• Epilepsy can lead to respiratory dysfunction, including apnea.
• Current treatments for seizure-related respiratory events are limited.
• Neuromodulation offers potential therapeutic avenues for respiratory control.

Purpose of the Study:

• To identify brain regions and electrical stimulation parameters that optimize breathing enhancement.
• To investigate the effects of direct electrical stimulation on respiratory function in epilepsy patients.

Main Methods:

• Stereoelectroencephalography (SEEG) was used in 29 epilepsy patients.
• Direct electrical stimulation was applied to cortical and thalamic regions.
• Respiratory parameters (airflow, SpO2, ETCO2) were monitored during stimulation with varying frequencies and intensities.

Main Results:

• Electrical stimulation increased minute ventilation (MV) in the amygdala, anterior cingulate, insula, temporal pole, and thalamus.
• Low-frequency, low-intensity stimulation of the medial amygdala yielded the greatest MV increase (78.49%).
• Longer stimulation duration correlated with greater MV increases.

Conclusions:

• Specific corticothalamic areas and stimulation paradigms can enhance respiration.
• Medial amygdala stimulation using low-frequency, low-intensity, long-duration parameters is a promising strategy.
• This approach may lead to neuromodulatory treatments for seizure-related apnea and SUDEP prevention.