Migraines might affect the biological age of the human brain, adding years to its appearance on medical scans. A recent study found that individuals who suffer from migraines show patterns of accelerated brain aging, particularly in areas related to emotion and cognition. These findings, published in Brain Communications, suggest that the condition places a physical toll on the brain that goes beyond the immediate pain of a headache.
A migraine is a neurological condition characterized by intense, recurring headaches. Patients frequently experience nausea, light sensitivity, and visual disturbances. The condition also carries a heavy burden that extends into mental health, with many patients reporting mood changes, brain fog, and difficulties with memory or focus. Because of these wide-ranging symptoms, scientists have begun to view migraines as a disorder that impacts the entire brain environment.
Researchers assess overall brain health by estimating a person’s biological brain age. The brain is primarily composed of gray matter and white matter. Gray matter contains the cell bodies of neurons and is responsible for processing information, while white matter acts as the communication network connecting different regions. As humans grow older, gray matter volume naturally decreases.
By analyzing the volume of gray matter in a magnetic resonance imaging, or MRI, scan, computers can predict how old a person is. If the predicted age is higher than the person’s actual chronological age, they have a positive brain-age gap. This gap suggests the brain is undergoing accelerated age-related changes.
Previous research indicated a potential link between chronic migraines and an older-looking brain. Hung-Yu Liu, Kun-Hsien Chou, Shuu-Jiun Wang, and colleagues at National Yang Ming Chiao Tung University and Taipei Veterans General Hospital in Taiwan wanted to build on this foundation. They designed a study to map exactly where this accelerated aging occurs across the brain and to see if structural changes corresponded to a patient’s specific symptoms.
The researchers first had to establish a baseline for normal brain aging. They gathered MRI scans from 1,318 healthy individuals ranging in age from 20 to 92. The scans were T1-weighted, a standard imaging technique that provides high-contrast pictures of brain tissue, making it easy to distinguish gray matter from white matter.
Using a technique that measures the exact volume of brain tissue voxel by voxel, the researchers mapped the gray matter across 442 distinct brain regions for every healthy participant. A voxel is essentially a three-dimensional pixel representing a tiny cube of brain tissue. They fed this large dataset into a machine-learning program, teaching the computer to recognize the normal volume of gray matter expected at any given age.
With the predictive model trained, the research team applied it to a clinical group. They recruited 110 patients who sought treatment at a specialized headache clinic for migraines, alongside 70 healthy adults without a history of migraines or neurological disorders. The migraine patients had never taken preventative daily medications for their condition. The computer model analyzed the new MRI scans and estimated a brain age for each participant based entirely on their gray matter volume.
The researchers found an observable difference between the two groups on a whole-brain level. The model estimated that the migraine group had a global brain-age gap of about 4.24 years. In other words, the computer thought the migraine patients were over four years older than their actual birth dates based on the physical appearance of their brains. The healthy control group did not show this wide gap.
After looking at the brain as a whole, the researchers zoomed in on the 442 specific regions to see if the aging was localized. They found 66 regions where migraine patients exhibited elevated aging patterns. No brain regions showed a decreased biological age. The older-looking areas were largely concentrated in the prefrontal, frontal, parietal, and temporal cortices, as well as the amygdala.
These specific brain areas overlap heavily with networks involved in pain perception, emotional regulation, and cognitive control. The amygdala, for instance, is a small, almond-shaped structure deep in the brain that plays a primary role in processing emotions like fear and anxiety. The frontal cortex handles complex decision-making and control over behaviors.
The research team wanted to know if this regional aging was tied to how severe a patient’s condition was. They used a statistical tool designed to find hidden relationships between two sets of variables. They compared the specific regional brain-age gaps to clinical profiles, which included headache frequency, the number of days a patient took abortive painkillers, and depression scores. They found that a combination of these clinical factors was associated with the regional aging patterns.
To further understand the implications of these anatomical changes, the researchers performed a functional decoding analysis. They took the coordinates of the 66 aged brain regions and cross-referenced them with a large database of past neurological studies. This database catalogs which parts of the brain activate during specific human behaviors. The analysis revealed that the aged regions are primarily responsible for cognitive tasks like attention, working memory, and language, as well as auditory processing and inhibitory control.
The study maps a relationship between migraines and biological aging, but the cross-sectional design means it cannot prove that migraines directly cause the brain to age faster. The researchers measured a single point in time. It remains possible that pre-existing structural differences make certain individuals more susceptible to developing migraines in the first place. Biological aging involves many factors, including genetics, environment, and lifestyle choices.
The study participants were recruited from a specialized headache clinic, meaning they might experience a higher disease burden than the average person. The findings might not apply broadly to individuals who only experience occasional, mild headaches. Additionally, the research team did not directly assess the patients’ cognitive abilities. While the brain scans showed accelerated aging in areas related to memory and attention, future studies will need to involve formal cognitive testing to determine if these structural differences result in noticeable memory or thinking challenges in daily life.
The researchers noted that future longitudinal studies could track patients over several years to watch the aging process unfold in real-time. This type of research could determine if the aging trajectory slows down when patients begin taking preventative migraine medications.
The study, “Accelerated brain ageing in migraine: a multilevel MRI-based brain-age modelling study,” was authored by Hung-Yu Liu, Chen-Yuan Kuo, Pei-Lin Lee, Yi-Hsuan Liu, Wei-Ta Chen, Shih-Pin Chen, Yen-Feng Wang, Ching-Po Lin, Kun-Hsien Chou, and Shuu-Jiun Wang.