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The activation-synthesis hypothesis, proposed by Harvard University psychiatrists John Allan Hobson and Robert McCarley, is a neurobiological theory of dreams first published in the American Journal of Psychiatry in December 1977.
In 1977, Hobson and McCarley developed the activation synthesis theory of dreaming that said that dreams do not have meanings and are the result of the brain attempting to make sense of random neuronal firing in the cortex. [2] McCarley has extensively studied the brainstem mechanisms that control REM sleep. [3]
One popular theory as to the reasoning behind dreams is Hobson's activation-synthesis theory. This theory states that while sleeping we cycle through REM (rapid eye movement) periods about every 90 minutes. During these periods various neurotransmitters fire off, causing dreams.
Cholinergic activation of these higher areas was thought to result in the meaningless images that make up our dreams. This process is switched off by noradrenaline and serotonin which are also released by the brain stem. The formation of the Activation-Synthesis Model put forth by Allan Hobson and McCarley in 1975 rested largely on these ...
Dream consciousness is a term defined by the theorist of dreaming science J. Allan Hobson, M.D. as the memory of subjective awareness during sleep. According to the theory its importance for cognitive science derives from two perspectives. One is the brain basis for consciousness itself and the other is the interpretation of dreams.
John Allan Hobson (June 3, 1933 – July 7, 2021 [1]) was an American psychiatrist and dream researcher. He was known for his research on rapid eye movement sleep.He was Professor of Psychiatry, Emeritus, Harvard Medical School, and Professor, Department of Psychiatry, Beth Israel Deaconess Medical Center.
Writing in 1989, psychology professor, Harry T. Hunt states that "on an organizational level, the Sleep Research Society (srs) and its small cluster of researchers focusing on physiological, neurocognitive, and content analysis approaches to dreams have been supplemented by a more eclectic organization, the Association for the Study of Dreams ...
Freud considered that the experience of anxiety dreams and nightmares was the result of failures in the dream-work: rather than contradicting the "wish-fulfillment" theory, such phenomena demonstrated how the ego reacted to the awareness of repressed wishes that were too powerful and insufficiently disguised. Traumatic dreams (where the dream ...