What is the role of clinical neurophysiologic testing in the workup of trigeminal neuralgia (TN)?

Updated: Jul 11, 2019
  • Author: Manish K Singh, MD; Chief Editor: Robert A Egan, MD  more...
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Clinical neurophysiology testing with a blink reflex study may be helpful to demonstrate a lesion of the trigeminus in which a bilateral delay occurs in response to the stimulation on the pathologic side. [25] The blink reflex can clearly help distinguish between the symptomatic form of trigeminal neuralgia and the idiopathic form of trigeminal neuralgia. The sensitivity of this test across studies has been reported as 59-100%, and the specificity has been noted as 93-100%.

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