Migraine pain originates in the trigeminovascular pathway, where sensory nerve fibers surrounding cerebral blood vessels release calcitonin gene-related peptide (CGRP) and other inflammatory neuropeptides. In a healthy nervous system, these pathways remain dormant unless triggered by actual tissue injury. However, in migraine-prone individuals, the brainstem's pain-modulating circuits become hypersensitive, lowering the threshold for activation. Research shows that approximately 12% of the general population experiences migraines, with women affected three times more frequently than men due to hormonal influences on this pathway.
When the trigeminal nerve fires inappropriately, it triggers a cascade of neurogenic inflammation around meningeal blood vessels. This inflammation causes vasodilation and plasma protein extravasation, producing the characteristic throbbing pain. The sensitized trigeminal nucleus then amplifies incoming signals from the face, jaw, and upper cervical spine, which is why TMJ pain treatment and cervical correction often provide migraine relief. This central sensitization explains why light, sound, and movement become painful during an attack.
The brainstem serves as the gateway between peripheral triggers and cortical pain processing. Misalignment in the upper cervical spine can compress or irritate neural structures at the brainstem level, maintaining a state of heightened excitability. This structural component explains why many patients with medication-resistant migraines respond well to targeted cervical interventions that restore proper alignment and reduce mechanical irritation of these critical neural pathways.
