Trigeminal Neuralgia LO

Trigeminal Neuralgia LO - Learning Issue: Trigeminal...

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Learning Issue: Trigeminal Neuralgia-MH Definition: Also known as tic douloureux and is characterized by recurrent episodes of brief severe pain lasting from seconds to a few minutes, most often the distribution of V 2 or V 3 . Etiology: Painful episodes are often provoked by chewing, shaving, or touching a specific trigger point on the face. Risk Factors or Predisposing Factors: It can be caused by MS as a result of demyelination of the trigeminal nerve in the entry zone of the brainstem, and in combination with hypertension. Advanced age is also a risk factor Epidemiology: Incidence is 4-5 cases per 100,000. TN does not affect any particular race, and male to female ratio is 1:2. Age of onset is typically after 60-70 years of age. If TN presents within the age of 20-40 years MS should be considered. Pathophysiology: Neuropathic pain is the cardinal sign of injury to the small myelinated and thinly myelinated primary afferent fibers that subserve nociception. Typically no
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Trigeminal Neuralgia LO - Learning Issue: Trigeminal...

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