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Unformatted text preview: Cluster Headache Rachel Chacko Definition A primary neurovascular primary headache disorder characterized by severe strictly unilateral, typically retro-orbital or periorbital, short-lasting headaches accompanied by prominent cranial facial parasympathetic autonomic features The posterior hypothalamic grey matter has been identified as the key area for the basic defect in CH More common in men 3:1 M:F ratio Slightly more prevalent in African American population More common in third decade of life The International Headache Society (IHS) classifies CH by duration as episodic or chronic. Episodic CH occurs in periods lasting from 7 days to 1 year; cluster attacks are separated by pain-free intervals lasting at least 2 weeks. Chronic CH is defined as that occurring for more than 1 year without remission or with remissions lasting less than 2 weeks. It is subdivided into chronic CH from onset and chronic CH evolving from episodic....
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- Fall '10