The short lasting primary headaches are classified as those without autonomic activation and those with important activation, which includes the cluster headache. This study focuses on the pathophysiology of cluster headache mainly in its autonomic phenomenon (conjuntival injection, lacrimation, nasal congestion, rhinorrhoea, parcial ptosis and eyelid oedema) showing the involvement of superior salivatory nucleus with the pain stimulus propagation, which begins in the trigeminal nerve. The autonomic alterations were studied in 28 patients being lacrimation and conjuntival injection, the main features.
cluster headache; autonomics alterations
