MedGen

The Kleine-Levin hibernation syndrome, a rare disorder that occurs predominantly in males, is characterized by episodic attacks of aberrant behavior, hypersomnia, and increased feeding (megaphagia) and sex drives (Kleine, 1925; Levin, 1929). [from OMIM]

Perceptual experiences that are vivid, intense, and sensory in nature occur in the absence of corresponding stimuli from the external environment. [from HPO]