The author critiques the recently proposed activation-synthesis
hypothesis about the origin and formation of dreams. Many findings do not
support the new hypothesis that specific pontine physiological processes,
rather than mental processes, instigate dreams and produce their
distortion. First, dreaming often occurs in the absence of the pontine
processes. Second, forebrain activity (which can have mental correlates) is
crucial to the instigation and maintenance of dreaming sleep. Finally,
activity of the proposed pontine dream generator, which is claimed to cause
dream distortion, is not reliably accompanied by dream distortion.
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