Altered dorsal anterior insula functional connectivity underlying abnormal interoceptive accuracy awareness in migraine without aura.

Researchers investigated how people with migraine perceive internal body signals, a process called interoception. They studied 29 migraine patients and 32 healthy controls using brain scans and heartbeat awareness tests. The study found that migraine patients showed heightened awareness of their internal body sensations compared to people without migraines. Brain imaging revealed that migraine patients had stronger connections between a brain region called the dorsal anterior insula and the precentral gyrus, areas involved in processing body awareness and movement control. This increased connectivity was directly linked to their enhanced ability to detect internal body signals. Importantly, the researchers determined this altered brain connectivity appears to drive the heightened body awareness seen in migraine patients, rather than being a consequence of it. These findings suggest that migraine involves fundamental changes in how the brain processes internal body signals, which may contribute to migraine development and symptoms. For acupuncture practitioners, this research provides scientific support for the body-mind connection central to traditional approaches. Acupuncture's effects on interoceptive processing and brain connectivity may help explain its therapeutic benefits for migraine patients. The study supports the notion that treatments addressing body awareness and internal signal processing, such as acupuncture, may be particularly relevant for migraine management. If you're considering acupuncture for migraine, seek a licensed or certified acupuncturist with experience in headache disorders.

This neuroimaging study examined interoceptive processing in 29 migraine without aura patients versus 32 matched controls using resting-state fMRI and heartbeat awareness tasks. Patients demonstrated significantly enhanced interoceptive accuracy awareness compared to controls. Seed-based connectivity analysis revealed markedly increased functional connectivity between the right dorsal anterior insula (dAI) and bilateral precentral gyrus (PreCG) in migraine patients. Across all participants, this dAI-PreCG connectivity positively correlated with interoceptive accuracy awareness. Simple mediation analysis confirmed that elevated dAI-PreCG connectivity substantially mediated group differences in interoceptive awareness. Serial multiple mediation revealed this effect was predominantly driven by objective rather than subjective interoceptive accuracy metrics. Clinical takeaway: Altered dAI connectivity and heightened interoceptive processing appear integral to migraine neuropathology, suggesting therapeutic interventions targeting interoceptive networks, including acupuncture's known effects on insular function and body awareness, may address core pathophysiological mechanisms rather than merely symptomatic relief.