Vivid sensory images occurring at sleep onset, but particularly vivid with sleep-onset REM periods. A feature of narcoleptic naps when the onset occurs with REM sleep.*Also: narcolepsy, hypnopompic, sleep paralysis
The online Diagnostic & Statistical Manual of Mental Disorders lists most of the major psychological disorders and illnesses and lists the criteria that must be fulfilled in order for a diagnosis to be made. This resource is not a substitute for proper professional psychiatric diagnosis.