Migraine aura is well recognized as a cause of simple visual hallucinations; complex dream-like visual hallucinations are less common. They are seen more frequently in migraine coma and in familial hemiplegic migraine. Rarely migraine-associated hallucinations may be of purely auditory nature, possibly reflecting a dysfunction of the temporal lobe due to ischemia [142, 143]. Olfactory, gustatory and other more complex hallucinations such as temporal-visual distortions have all been reported [144, 145]. Podoll and Robinson described the unusual case of auditory-visual synesthesia during migraine attacks: the visual hallucinations consisted in a colored geometric figure induced by the sound of the alarm clock, which then disappeared with the alarm . A few cases of recurrent lilliputian hallucinations during migraine attacks have been reported, although this type of hallucinations is usually associated with mesen-cephalic and/or thalamic lesions (peduncular hallucinosis) .
Levitan et al. analyzed the content of 23 dreams that immediately preceded a migraine attack, finding a significant predominance of powerful negative emotions .
Recurrent dreams and nightmares have been reported as aura equivalent .
A few patients with cluster headache may report a visual aura, often characterized by black-and-white flashing lights preceding the attacks. One patient with cluster headache has been described to have olfactory hallucinations ("bad citrus fruits smell") preceding the attack by 3-4 minutes .
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Are Headaches Taking Your Life Hostage and Preventing You From Living to Your Fullest Potential? Are you tired of being given the run around by doctors who tell you that your headaches or migraines are psychological or that they have no cause that can be treated? Are you sick of calling in sick because you woke up with a headache so bad that you can barely think or see straight?