A<unk>  is a vivid and convincing dream about<unk>  from sleep, while the dreamer in reality continues to sleep. After a<unk> , subjects often dream they are performing daily morning routine such as showering, cooking, cleaning, eating, and using the bathroom.<unk> s, mainly those in which one dreams that they have awoken from a sleep that featured dreams, take on aspects of a double dream or a dream within a dream. A classic example is the double<unk>  of the protagonist in Gogol's Portrait (1835).
False awakening
Fatal insomnia
Excited delirium
Hypnoid state
Masked depression
Emergence delirium
Cholinergic crisis
Heat syncope