PMC10410439_01
Timeline: Recurrent nocturnal awakenings in cluster headache: a different type of ghost attack.
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F1
These were described as sudden awakenings every night, always around the same time, around 4-4.30 a.m.; he was not agitated and did not need to get out of bed, but after the awakening, he had sleep disturbances characterized by vivid dreams (Figure 1).