Brain Excitability in Tension-Type Headache: a Separate Entity from Migraine?

Area of Science:

• Neurology
• Neuroscience
• Headache Disorders

Background:

• Tension-type headache (TTH) is highly prevalent and often considered distinct from migraine.
• Migraine is frequently characterized as a brain excitability disorder.
• TTH and migraine often occur together, complicating their differentiation.

Purpose of the Study:

• To review existing research on brain excitability in TTH.
• To investigate whether TTH is a distinct clinical entity from migraine based on excitability profiles.
• To explore the potential for TTH-specific biomarkers.

Main Methods:

• Review of prior studies on TTH brain excitability.
• Analysis of a recent magnetoencephalography study comparing strict-criteria TTH, migraine, and control groups.
• Assessment of somatosensory excitability and preactivation excitability.

Main Results:

• A recent study using strict diagnostic criteria found differing somatosensory excitability profiles between TTH and migraine patients.
• Preactivation excitability measurements successfully discriminated between TTH and migraine.
• Previous studies on TTH brain excitability yielded inconclusive or shared findings with migraine.

Conclusions:

• TTH and migraine appear to differ in their brain excitability patterns.
• Strict diagnostic criteria are crucial for future research to avoid confounding effects of migraine comorbidity.
• Identifying TTH-specific pathophysiology could lead to targeted treatments.