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Dysfunctional mesocorticolimbic circuitry in cluster headache
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Journal Article
Dysfunctional mesocorticolimbic circuitry in cluster headache
2025
Overview
Background
This study aimed to identify mesocorticolimbic functional abnormalities in cluster headache (CH) patients, disentangling the roles of chronification and affective symptoms.
Methods
Using the monetary incentive delay fMRI task to directly engage these pathways, we investigated functional alterations in key regions of this network in chronic (
n
= 23) and episodic CH patients (
n
= 49) compared to a control group (
n
= 32). After processing the fMRI data, we extracted beta values from selected regions and for contrasts of interest and entered them into logistic regression models adjusted for potential confounders (such as depressive and anxiety symptoms and smoking habit) to test their association with the diagnoses (chronic CH and control subjects, episodic CH and control subjects).
Results
Results showed that chronic CH patients exhibited reduced ventral tegmental area (VTA) activity and a tendency towards significance (
p
= 0.056) for an increased medial prefrontal cortex (mPFC) responsiveness during reward anticipation, alongside a significant decrease in mPFC activity during reward outcomes. Episodic patients displayed abnormal mPFC activity across both reward phases, but coupled with intact VTA responses. Importantly, these functional abnormalities were not correlated to depressive and anxiety symptoms and smoking habits.
Conclusions
These findings suggest that chronic CH patients experience an imbalance in the VTA-mPFC pathway, while episodic patients may show early signs of this emerging dysfunction. Moreover, the observed reward processing alterations seem distinct from those associated with affective disorders, possibly highlighting unique mechanisms underlying the pathophysiology of CH.
Publisher
Springer Milan,Springer Nature B.V,BMC
Subject
/ Anxiety
/ Cluster Headache - diagnostic imaging
/ Cluster Headache - physiopathology
/ Cluster Headache - psychology
/ Female
/ fMRI
/ Functional magnetic resonance imaging
/ Headache
/ Humans
/ Male
/ Medicine
/ Monetary incentive delay task
/ Neural Pathways - diagnostic imaging
/ Neural Pathways - physiopathology
/ Patients
/ Prefrontal Cortex - diagnostic imaging
/ Prefrontal Cortex - physiopathology
/ Reward
/ Smoking
/ Ventral Tegmental Area - diagnostic imaging
