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Trigeminal sensory pathway function in patients with SUNCT.

A Truini1, P Barbanti, F Galeotti

  • 1Department of Neurological Sciences, University La Sapienza, Rome, Italy. andrea.truini@uniroma1.it

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|June 30, 2006
PubMed
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Short-lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) has distinct causes. Neurophysiological testing differentiates idiopathic SUNCT, which spares trigeminal pathways, from symptomatic SUNCT, which involves them.

Area of Science:

  • Neuroscience
  • Neurology

Background:

  • Short-lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) is a rare primary headache disorder.
  • The pathophysiology of SUNCT remains largely unknown.

Purpose of the Study:

  • To investigate the pathophysiology of SUNCT by examining trigeminal nerve pathways.
  • To differentiate between idiopathic and symptomatic SUNCT using neurophysiological methods.

Main Methods:

  • Recorded trigeminal reflexes and laser-evoked potentials (LEPs) in 11 SUNCT patients.
  • Ten patients had idiopathic SUNCT; one had symptomatic SUNCT due to trigeminal nerve compression.

Main Results:

  • Patients with idiopathic SUNCT exhibited normal trigeminal reflex and LEP responses.

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  • The patient with symptomatic SUNCT displayed abnormal trigeminal reflex and LEP responses.

    • Conclusions:

    • Idiopathic SUNCT does not affect trigeminal sensory pathways, unlike symptomatic SUNCT.
    • Neurophysiological testing can distinguish between idiopathic and symptomatic SUNCT, suggesting they are distinct pathophysiological entities.