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EMG blink-reflex

Indications: - brainstem tumor - stroke - multiple sclerosis - Bell's palsy - connective tissue disease - toxic neuropathy Reference interval: - normal R1 is <= 13 seconds - ipsilateral R2 is <= 41 seconds - contralateral R2 is<= 44 seconds Clinical significance: - a delayed or absent reflex is associated with compression or injury to the trigeminal nerve or facial nerve Procedure: - an electromyograph (EMG) technique measuring the latency of the blink response after stimulation of the supraorbital branch of the trigeminal nerve - conduction velocity in the trigeminal nerve & facial nerve are tested

Related

electromyography (EMG)

References

  1. Harrison's Principles of Internal Medicine, 13th ed. Companion Handbook, Isselbacher et al (eds), McGraw-Hill Inc. NY, 1995, pg 694-95
  2. Blink reflex http://www.neuro-test.com/testMethods/blinkReflex.html
  3. Rehabmanual: Blink reflex http://rehabmanual.com/Blink_reflex