Editing Dream interpretation (section)

=== Neurobiological theory ===
[[Allan Hobson]] and colleagues developed what they called the [[activation-synthesis hypothesis]] which proposes that dreams are simply the side effects of the neural activity in the brain that produces [[beta brain wave]]s during [[REM sleep]] that are associated with wakefulness. According to this hypothesis, neurons fire periodically during sleep in the lower brain levels and thus send random signals to the [[Cortex (anatomy)|cortex]]. The cortex then synthesizes a dream in reaction to these signals in order to try to make sense of why the brain is sending them. Although the hypothesis downplays the role that emotional factors play in determining dreams, it does not state that dreams are meaningless.<ref name=Weiten166>{{cite book | title=Psychology: Themes and Variations | url=https://archive.org/details/psychologythemes00weit_831 | url-access=limited | publisher=Cengage Learning | author=Wayne Weiten | year=2011 | pages=[https://archive.org/details/psychologythemes00weit_831/page/n210 166]–167 | isbn=978-0-495-81310-1}}</ref>