Woman suffering from a migraine attack, showing symptoms associated with a migraine brain vs normal brain.

Migraine Brain vs. Normal Brain: What Happens in the Brain During a Migraine

Migraine is often misunderstood as “just a bad headache.” In reality, migraine is a complex neurological condition that affects how the brain processes pain, sensory input, and even everyday information. This is why migraine symptoms can include visual disturbances, nausea, brain fog, light sensitivity, and profound fatigue, sometimes with or without head pain.

Key Takeaways

  • A migraine brain functions differently from a non-migraine brain, even between attacks.

  • Migraine involves altered brain signaling, sensory processing, and blood flow.

  • Cortical spreading depression plays a key role in many migraine symptoms.

  • Structural and anatomical factors may contribute to migraine in some individuals.

  • Migraine biology helps explain why symptoms and triggers differ so much from person to person.

Understanding the difference between a migraine brain vs. a normal brain helps explain why migraines happen, why triggers vary so widely, and why some people experience symptoms that go far beyond pain.

How the Migraine Brain Differs From a Normal Brain

Research shows that people who live with migraine have brains that are more excitable and more sensitive to stimulation compared to people without migraine¹. This heightened sensitivity affects how the brain processes light, sound, smell, pain, and internal signals.

In a non-migraine brain, sensory input is filtered efficiently. In a migraine brain, that filtering system is less stable, making the nervous system more reactive. This helps explain why everyday stimuli, like fluorescent lights or mild stress, can feel overwhelming during a migraine.

Importantly, these differences can exist even between attacks, suggesting migraine is a persistent neurological state rather than a series of isolated episodes².

What Happens in the Brain During a Migraine Attack

A migraine attack unfolds in phases, each reflecting changes in brain activity:

  • Prodrome: early changes in brain signaling that may cause fatigue, mood changes, or food cravings
  • Aura (in some people): visual or sensory disturbances linked to altered electrical activity
  • Headache phase: activation of pain pathways and inflammatory signaling
  • Postdrome: lingering cognitive and physical symptoms after pain subsides¹

A key process involved, especially in aura, is cortical spreading depression (CSD). CSD is a slow-moving wave of electrical activity across the brain’s cortex, followed by a temporary suppression of normal function². This phenomenon is linked not only to aura, but also to changes in sensory processing and cognition during migraine.

Blood Flow, Oxygen, and the Migraine Brain

Migraine was once thought to be purely a vascular disorder, but modern research shows it’s primarily neurological, with blood flow changes as part of the picture, not the sole cause².

During migraine, cerebral blood flow can fluctuate in ways that affect oxygen delivery and neural signaling. These changes may contribute to symptoms like throbbing pain, visual disturbances, and dizziness. Blood flow dynamics can also help explain why posture (lying down vs. sitting upright) affects symptoms for some people¹.

The Role of the Trigeminovascular System

The trigeminovascular system is central to migraine pain. It involves the trigeminal nerve, which transmits sensory information from the face, head, and neck to the brain¹.

When this system becomes sensitized, it can amplify pain signals and trigger the release of inflammatory neuropeptides. This helps explain why migraine pain often overlaps with jaw pain, neck tension, facial pressure, or scalp tenderness, and why migraine is rarely confined to a single “spot.”

Anatomical Factors That May Influence Migraine in Some People

It’s important to be clear that most migraines are not caused by structural abnormalities. However, in a subset of patients, particularly those with refractory or atypical symptoms, anatomical factors may play a role or coexist with migraine.

Craniocervical Instability (CCI)

Craniocervical instability refers to excessive movement at the junction of the skull and cervical spine. In certain connective tissue disorders, this instability may affect brainstem signaling, autonomic regulation, or blood flow, all of which are factors relevant to headache disorders³.

CCI is not a common cause of migraine, but it is sometimes evaluated in people with complex neurological symptoms, severe neck pain, or positional headaches.

Jugular Vein Compression and Venous Outflow

The brain relies on efficient venous drainage through the jugular veins. Research using MRI has shown that altered venous outflow can affect cerebrospinal fluid (CSF) dynamics⁴.

In theory, impaired venous drainage may influence intracranial pressure or symptom patterns in some headache disorders. Evidence on migraine remains emerging, so this connection should be framed cautiously and considered only in specific clinical contexts.

Chiari Malformation

Chiari malformation occurs when brain tissue (typically the cerebellar tonsils) extends into the spinal canal. Chiari headaches can resemble migraine and may include occipital pain, dizziness, and worsening symptoms with coughing or straining⁵.

Because symptoms can overlap, imaging is sometimes necessary to distinguish primary migraine from headache secondary to structural causes.

Why Triggers Affect Migraine Brains Differently

Migraine is often described as a threshold condition. Genetics and brain physiology set the baseline, while triggers like stress, dehydration, poor sleep, or sensory overload push the brain closer to an attack¹.

Because each person’s threshold and sensitivities differ, the same trigger may provoke migraine in one person and have no effect on another. This variability makes migraine highly individual and explains why management strategies are rarely one-size-fits-all.

Supporting Brain Function and Cognitive Resilience

Supporting a migraine-prone brain often focuses on reducing unnecessary stress on the nervous system. Consistent hydration, regular meals, sleep stability, and sensory pacing are foundational strategies¹.

Nutritional research in migraine also explores nutrients and compounds that support neural signaling, circulation, and cognitive resilience with the aim to support the brain rather than “fix” it⁶.

How Buoy Brain Health Drops Support Cognitive Function

For people navigating migraine-related brain fog or cognitive strain, Buoy Brain Health Drops are designed to support hydration and brain function in a simple, liquid format.

The formula includes the following ingredients:

  • Panax ginseng, studied for its role in cognitive performance and mental stamina⁶
  • Ginkgo biloba, a nootropic associated with cerebral circulation and investigated in migraine with aura contexts⁷
  • GABA, a neurotransmitter involved in calming neural activity and balance⁶

Because Brain Health Drops are liquid, they can be added to water or another beverage and used consistently throughout the day, which is an approach some people find easier during migraine-prone periods. They’re intended to support brain function, not treat migraine itself.

When To Talk to a Doctor About Neurological Migraine Symptoms

Medical evaluation is important if migraine symptoms change or include new neurological features. Red flags include weakness, balance problems, vision loss, headaches that worsen with posture, or symptoms that don’t follow a typical migraine pattern¹.

Imaging and specialist care can help rule out secondary causes and guide appropriate treatment, especially when anatomical factors may be involved.

Hydration and Brain Support for Migraine

The migraine brain is different from a normal brain, and understanding this complex condition can be empowering. Supporting brain health often comes down to small, consistent actions that reduce strain on a sensitive nervous system. Buoy Brain Health Drops offer a low-effort way to support hydration and cognitive function as part of a broader migraine-aware routine.

References

¹ National Institute of Neurological Disorders and Stroke. (n.d.). Migraine. National Institutes of Health. https://www.ninds.nih.gov/health-information/disorders/migraine 

² Ashina, M., Hansen, J. M., Á Dunga, B. O., & Olesen, J. (2017). Human models of migraine—Short-term pain for long-term gain. Nature Reviews Neurology, 13(12), 713–724. https://www.nature.com/articles/nrneurol.2017.137 

³ Henderson, F. C., Austin, C., Benzel, E., Bolognese, P., Ellenbogen, R., Francomano, C. A., … Voormolen, M. H. J. (2017). Neurological and spinal manifestations of the Ehlers–Danlos syndromes. American Journal of Medical Genetics Part C, 175(1), 195–211. https://onlinelibrary.wiley.com/doi/10.1002/ajmg.c.31549  

⁴ Bhadelia, R. A., Bogdan, A. R., & Wolpert, S. M. (1998). Cerebrospinal fluid flow waveforms: Effect of altered cranial venous outflow—A phase-contrast MR flow imaging study. Neuroradiology, 40, 283–292. https://link.springer.com/article/10.1007/s002340050586  

⁵ Mehta, A., Chilakamarri, P., & Zubair, A. (2018). Chiari headache. Current Pain and Headache Reports, 22, 70. https://link.springer.com/article/10.1007/s11916-018-0702-8  

⁶ Hajhashemy, Z., Golpour-Hamedani, S., Eshaghian, N., Sadeghi, O., Khorvash, F., & Askari, G. (2024). Practical supplements for prevention and management of migraine attacks: A narrative review. Frontiers in Nutrition, 11, 1433390. https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2024.1433390/full 

⁷ D’Andrea, G., Bussone, G., Allais, G., Aguggia, M., D’Onofrio, F., Maggio, M., Moschiano, F., Saracco, M. G., Terzi, M. G., & Petretta, V. (2009). Efficacy of ginkgolide B in the prophylaxis of migraine with aura. Neurological Sciences, 30(1), 121–124. https://link.springer.com/article/10.1007/s10072-009-0074-2 

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