Regulatory Effects of Acupuncture on Emotional Disorders in Patients With Menstrual Migraine Without Aura: A Resting-State fMRI Study

Menstrual migraine is a specific subtype of headache that affects millions of women worldwide and represents one of the leading neurologic conditions causing disability in the female population. This condition, known as menstrual migraine without aura, is directly associated with the ovarian hormonal cycle and tends to be more intense and longer-lasting during the menstrual period. What many patients and healthcare professionals still do not fully recognize is that this condition extends well beyond headache, often bringing with it significant emotional disorders such as anxiety and depression. The coexistence of these emotional problems with migraine creates a cycle that profoundly affects women's quality of life and represents a complex therapeutic challenge, especially because the use of traditional medications can be limited or contraindicated in some cases.

This scientific study aimed to investigate whether acupuncture could modulate brain activity and whether these neurologic changes were related to improvement in emotional symptoms in patients with menstrual migraine without aura. To this end, researchers used a neuroimaging technique called resting-state functional MRI, which allows observation of how different brain regions behave when the person is not performing any specific task. The study involved 44 women who were randomly divided into two groups: one received true acupuncture at specific traditional points, while the other received sham acupuncture at points that do not correspond to traditional therapeutic locations. The treatment lasted three months, with sessions performed following the menstrual cycle pattern — once every two days during the week before menstruation, twice a week during the menstrual period, and twice a week the rest of the time.

Participants were assessed through standardized questionnaires for anxiety and depression, as well as scales for headache intensity and frequency.

The study's findings revealed interesting and clinically relevant results. Both treatment groups showed significant improvements in emotional symptoms and headache intensity after three months of treatment. However, true acupuncture was superior to sham acupuncture in controlling migraine attack frequency. Even more fascinating were the brain imaging findings, which showed that the two types of acupuncture work through different neurologic mechanisms.

True acupuncture promoted changes mainly in fronto-limbic brain regions, which are areas crucial for emotional processing and mood regulation. Specifically, a positive correlation was observed between changes in anterior cingulate cortex activity and reductions in anxiety and depression scores. This brain region is known for its fundamental role in both pain perception and emotional control. In contrast, sham acupuncture showed activation primarily in the insula, a brain region involved in pain processing that may be related to the placebo effect.

For patients suffering from menstrual migraine and their families, these results offer hope and robust scientific evidence about the efficacy of acupuncture as a complementary treatment. The study demonstrates that acupuncture not only relieves headache but also acts on the neural circuits responsible for the emotional disorders associated with the condition. This is particularly important because it offers a non-pharmacologic alternative for women who cannot or prefer not to use certain medications. For healthcare professionals, these findings provide a solid scientific foundation for recommending acupuncture as part of an integrated treatment plan, especially considering that the technique proved to be safe and effective.

The discovery that different types of needling stimulation activate distinct neural circuits also contributes to a better understanding of the mechanisms of action of acupuncture, allowing for more personalized and effective approaches.

It is important to recognize some limitations of this study that should be considered when interpreting the results. First, the researchers did not perform hormonal analyses, which would be valuable given the fundamental role of hormones in menstrual migraine. Future studies should include such measurements to better understand how hormonal fluctuations influence neurologic outcomes. Second, the study did not include a healthy female control group for comparison, which limited the ability to fully explore the pathologic mechanisms of menstrual migraine.

Third, patients' expectations during treatment were neither assessed nor quantified, a factor that can significantly influence therapeutic outcomes. Despite these limitations, this study represents an important advance in scientific understanding of the effects of acupuncture on the brain and offers promising evidence that this ancient therapy may be a valuable tool in the comprehensive management of menstrual migraine and associated emotional disorders, providing women with a broader and potentially safer treatment option for managing this debilitating condition.