Systemic CGRP modifies electrical potentials in the cochlea and vestibular organs while increasing auditory and vestibular hypersensitivity, linking it to migraine sensory symptoms.
18%of people worldwide affected by migraine, with CGRP now linked to inner ear sensory dysfunction
What the researchers found
Systemic CGRP modifies electrical potentials in both cochlear and vestibular end organs and increases auditory and vestibular sensory hypersensitivities.
Why it matters
Reveals a peripheral mechanism for migraine-associated sensory symptoms, suggesting anti-CGRP drugs may work partly by protecting the inner ear from CGRP-driven hypersensitivity.
The numbers in context
Systemic CGRP modified cochlear and vestibular end organ potentials; increased auditory and vestibular behavioral sensitivities.
How the study worked
Neurophysiology study measuring auditory and vestibular end organ electrical potentials after systemic CGRP administration, with parallel assessment of sensory sensitivity changes.
Who was studied
Mice (strain not specified in abstract)
What this study cannot tell us
Animal study — human inner ear physiology may respond differently; systemic CGRP delivery may not perfectly mimic natural release patterns during migraine; acute study design.
How to read the evidence
Neurophysiology study with direct electrical measurements; provides mechanistic evidence but needs human clinical correlation.
When this study was published
Published in 2025, expanding the understanding of CGRP's role beyond central nervous system migraine pathways.
The bigger picture
Understanding CGRP's peripheral effects on the inner ear adds a new dimension to migraine therapy — anti-CGRP drugs may not only prevent headaches but also directly reduce the sound sensitivity and dizziness that make migraine so disabling.
Questions still open
- Do anti-CGRP therapies measurably reduce inner ear hypersensitivity in migraine patients?
- Could targeted inner ear delivery of CGRP antagonists treat vestibular migraine more specifically?
Common questions
Why does migraine cause sound sensitivity and dizziness?
Could anti-CGRP drugs help with migraine dizziness?
Read the original research
Systemic calcitonin gene-related peptide modifies auditory and vestibular end organ electrical potentials, and increases sensory hypersensitivities.
Journal of neurophysiology, 134(1), 107-117
Citation
Rahman, Shafaqat M; Faucher, Stefanie; Jonnala, Raajan; Holt, Joseph C; Lee, Choongheon; Luebke, Anne E. (2025). Systemic calcitonin gene-related peptide modifies auditory and vestibular end organ electrical potentials, and increases sensory hypersensitivities.. Journal of neurophysiology, 134(1), 107-117. https://doi.org/10.1152/jn.00226.2024