An orexinergic circuit driving migraine relief by lavender essential oil.

Lavender essential oil (LEO) may provide relief for chronic migraine sufferers. Current pharmacological treatments often lack long-term effectiveness and suitability. Research shows that LEO inhalation activates orexinergic neurons in the brain. These neurons are located in the lateral hypothalamus of mice with induced chronic migraine. LEO activates connections from the anterior olfactory nucleus to orexinergic neurons. This process inhibits certain neurons that express calcitonin gene-related protein, alleviating migraine-like behaviors. The study used various methods, including viral tracing and behavior assays, to confirm these findings. Chemogenetic activation of the identified neural circuit mimics the pain relief seen with LEO. However, inhibiting this circuit or blocking specific receptors eliminated the antinociceptive effects. Overall, this research highlights a specific mechanism through which LEO can alleviate migraines. Clinical relevance: This study suggests that lavender essential oil may offer a new, effective treatment for chronic migraine relief.