Cluster HeadacheHeadacheVascular HeadachesHeadache DisordersTension-Type HeadacheMigraine DisordersSumatriptanTrigeminal Autonomic CephalalgiasHeadache Disorders, PrimaryPterygopalatine FossaTrigeminal NerveAlkadienesMigraine with AuraSpinal NervesMigraine without AuraParoxysmal HemicraniaTryptaminesHeadache Disorders, SecondaryAnisocoriaCluster AnalysisTrigeminal Caudal NucleusOrbitMiosisHypothalamus