Changes

A '''nightmare''' is an alternative version of a [[dream]] which may be experienced as unpleasant or frightening by the dreamer.

A '''nightmare''' is a [[dream]] which is experienced as unpleasant or frightening by the dreamer. Before modern times nightmares were ascribed to  a demonic-like creature which rested on the chest of the dreamer.  

[[Category:Psychology]]

[[Category:Psychology]]