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Updated: Mar 21, 2026
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Investigating Migraine-Like Behavior Using Light Aversion in Mice
Published on: August 11, 2021
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Migraine photophobia originating in cone-driven retinal pathways
Rodrigo Noseda1, Carolyn A Bernstein1, Rony-Reuven Nir2
1Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Boston MA 02215, USA Harvard Medical School, Boston, MA 02115, USA.
Brain : a Journal of Neurology
|May 19, 2016
Summary
Green light is less likely to trigger migraine headaches than other colors. This research suggests green light
Area of Science:
- Neuroscience
- Ophthalmology
- Photobiology
Background:
- Migraine headaches are often worsened by light exposure (photophobia).
- The specific wavelengths of light that trigger or alleviate migraine symptoms are not fully understood.
Purpose of the Study:
- To investigate the differential effects of various light colors on migraine headache severity.
- To explore the underlying neural mechanisms of light-induced migraine exacerbation and the potential therapeutic effects of green light.
Main Methods:
- Psychophysical assessments in migraine patients to evaluate headache exacerbation by different light colors.
- Electroretinography and visual evoked potential recordings in patients to assess retinal and cortical responses.
- Multi-unit recordings of dura- and light-sensitive thalamic neurons in rats to investigate neural pathways.
Main Results:
- Green light significantly exacerbated migraine headache less than white, blue, amber, or red light.
- Green light activated cone-driven retinal pathways to a lesser extent compared to white, blue, and red lights.
- Thalamic neurons showed the highest responsiveness to blue light and the lowest to green light; cortical responses were smallest to green light.
Conclusions:
- Migraine photophobia may originate in cone-driven retinal pathways, modulated by thalamic neurons, and processed by the cortex.
- The findings support the potential of green light as a therapeutic option for alleviating migraine-associated photophobia.
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