Changes in peripheral and central sensitization in patients undergoing occipital nerve stimulation

Area of Science:

• Neuroscience
• Pain Management
• Neuromodulation

Background:

• Central sensitization and impaired conditioned pain modulation (CPM) are implicated in migraine progression.
• Migraine patients may experience allodynia due to heightened nociceptor sensitivity.
• Occipital nerve stimulation (ONS) targets C1-C3 nerve branches to modulate nociceptive pathways.

Purpose of the Study:

• To investigate peripheral and central sensitization in migraine patients receiving percutaneous ONS.
• To evaluate the impact of ONS on CPM and quantitative sensory testing (QST) parameters.

Main Methods:

• Observational study involving 13 migraine patients undergoing ONS.
• Quantitative sensory testing (QST) performed pre- and post-ONS at multiple time points up to 12 months.
• Utilized dual Octrode leads and a rechargeable implantable pulse generator (IPG).

Main Results:

• Pre-ONS, patients exhibited impaired CPM; this normalized within 2 weeks post-ONS and remained improved for 12 months.
• No statistically significant differences were observed in pressure pain thresholds (PPTs) between pre- and post-ONS.
• ONS demonstrated a sustained positive effect on CPM response.

Conclusions:

• This study is the first to report ONS effects on central sensitization in migraine.
• ONS consistently improved CPM response, indicating a potential reduction in central sensitization.
• The normalization of CPM suggests ONS may be a viable treatment for reducing central sensitization in migraineurs.