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Nucleus accumbens functional connectivity discriminates medication-overuse headache.

D M Torta1, T Costa2, E Luda3

  • 1GCS fMRI, Koelliker Hospital and University of Turin, Turin, Italy; Department of Psychology, University of Turin, Turin, Italy; Institute of Neuroscience, IoNS, Université catholique de Louvain, Brussels, Belgium.

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Medication-overuse headache (MOH) patients exhibit distinct brain connectivity patterns compared to non-MOH individuals. These differences in motivational circuits could aid in developing new diagnostic tools for MOH.

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Area of Science:

  • Neuroscience
  • Neurology
  • Medical Imaging

Background:

  • Medication-overuse headache (MOH) is a secondary headache disorder linked to excessive use of acute headache medications.
  • Pathophysiological similarities are suggested between MOH and substance addiction disorders.

Purpose of the Study:

  • To investigate resting-state functional connectivity in the dorsal and ventral striatum of MOH patients.
  • To determine if functional connectivity patterns can differentiate MOH from non-MOH patients using classification algorithms.

Main Methods:

  • Examined whole-brain resting-state functional connectivity in 30 patients (15 MOH, 15 non-MOH).
  • Focused on the dorsal and ventral striatal regions, including the nucleus accumbens and dorsal rostral putamen.
  • Utilized classification algorithms to analyze spatial patterns of functional connectivity.

Main Results:

  • Functional connectivity of the nucleus accumbens and dorsal rostral putamen successfully discriminated between MOH and non-MOH patients.
  • Findings suggest altered reward circuitry in MOH patients, similar to those with substance use disorders.
  • Evidence indicates potential difficulties in breaking habitual behaviors among MOH patients.

Conclusions:

  • MOH patients demonstrate altered functional connectivity within motivational circuits at rest.
  • These connectivity differences enable blind discrimination between MOH and non-MOH conditions via algorithms.
  • The study findings may support the development of novel diagnostic approaches for medication-overuse headache.