A convergence hypothesis has been proposed that links the clinical features of a migraine attack with pathophysiological models, and suggests that successive symptoms reflect an escalating pathophysiological process, beginning with the premonitory period, progressing to a tension-type headache and – if uninterrupted – into a migraine.[Cady et al., 2002] The symptoms experienced at each stage reflect this progressive pathology.[Cady et al., 2002; Goadsby et al., 2017]
Migraine symptoms are complex and have specific neurologic origins
