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Related Experiment Videos

Primary trochlear headache: a new cephalgia generated and modulated on the trochlear region.

J Yangüela1, M Sánchez-del-Rio, A Bueno

  • 1Ophthalmology Unit, Fundación Hospital Alcorcón, Madrid, Spain. nguela@fhalcorcon.es

Neurology
|April 14, 2004
PubMed
Summary

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A new headache, primary trochlear headache, originates from the trochlear area. Local corticosteroid injections effectively treat this pain and associated headaches, offering relief when other therapies fail.

Area of Science:

  • Ophthalmology
  • Neurology
  • Pain Medicine

Background:

  • Patients presented with periorbital pain from the trochlear area, unresponsive to prior headache diagnoses.
  • This pain persisted despite the absence of trochleitis or other orbital/systemic diseases.
  • Previous treatments for various headaches were ineffective until local trochlear treatment was administered.

Purpose of the Study:

  • To investigate the trochlear area's role in causing and modulating headache.
  • To identify and characterize a potential new headache entity originating from the trochlear region.

Main Methods:

  • An observational case series design was employed.
  • Trochlear pain was defined by localized tenderness exacerbated by examination and supraduction.

Related Experiment Videos

  • Pain response was assessed following trochlear injections of lidocaine, corticosteroids, and placebo, with secondary orbital pain excluded.

    • Main Results:

    • Seventeen women and one man (mean age 44) reported unilateral trochlear pain, often extending to broader headache patterns.
    • No ocular autonomic signs or motility restrictions were noted; all imaging was normal.
    • Corticosteroid injections provided rapid (48 hours) and significant pain relief (95%), improving concurrent headaches and reducing analgesic use; placebo was ineffective.

    Conclusions:

    • The trochlear region is identified as the origin of a distinct, previously unrecognized headache: primary trochlear headache.
    • Local treatment targeting the trochlear area demonstrates efficacy for primary trochlear headache.
    • This localized therapy also benefits concurrent primary headaches unresponsive to systemic oral treatments.