Can Transient Ischaemic Attacks and Classical Migraine Always be Distinguished?

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Abstract
SYNOPSISAlthough it has long been appreciated that migrainous aura symptoms can occur without headache, it is less well known that headache often follows apparently embolic transient ischaemic attacks. It is suggested that these two diagnoses may originate with similar, if not identical, mechanisms, and that a predisposition to spreading depression may underly those clinical features usually considered characteristic of migraine.