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Dreams have a foresight function, enabling us to find a way out of an immediate conflict. [I 2] To reduce the polysemy of the term, Jung sometimes speaks of the "intuitive function" of dreams. [G 3] This prospective function is not in fact a premonitory dream, but teaches the dreamer a path to follow. [2]
The characteristics of REM sleep consistently contain a similar set of features. While dreaming, people regularly falsely believe that they are awake unless they implement lucidity. Dreams contain multimodal pseudo-perceptions; sometimes any or all sensory modalities are present, but most often visual and motoric. [9]
This was observed by two experiments: development of sleepiness after dopamine neuron destruction in substantia nigra in the midbrain, and discovery of the reticular activating system, which are visual cues received through our eyes and to our brain that begin the waking process, that waking consciousness depends sleep.
This includes the activation synthesis theory—the theory that dreams result from brain stem activation during REM sleep; the continual activation theory—the theory that dreaming is a result of activation and synthesis but dreams and REM sleep are controlled by different structures in the brain; and dreams as excitations of long-term memory ...
Research into dreams includes exploration of the mechanisms of dreaming, the influences on dreaming, and disorders linked to dreaming. Work in oneirology overlaps with neurology and can vary from quantifying dreams to analyzing brain waves during dreaming, to studying the effects of drugs and neurotransmitters on sleeping or dreaming.
Humans spend about two hours dreaming per night, [2] and each dream lasts around 5–20 minutes, although the dreamer may perceive the dream as being much longer. [3] The content and function of dreams have been topics of scientific, philosophical and religious interest throughout recorded history.
LaBerge and other researchers in these studies would record and compare eye movements, heart rate, blood pressure and skin potential in lucid and non-lucid dreams, which concluded that lucid dreams occurred in those REM period sections that were characterized by increased physiological activation. [citation needed]
Dual consciousness (also known as dual mind or divided consciousness) is a hypothesis in neuroscience.It is proposed that it is possible that a person may develop two separate conscious entities within their one brain after undergoing a corpus callosotomy.