Facts
Dreaming – mental activity occurring in sleep
Rapid Eye Movement (REM) sleep – eyes darted back and forth and up and down behind their close lids during sleep.
Not that dreaming occurs exclusively in REM sleep. It doesn’t. REM sleep just happens to provide the most ideal condition for occurrence.
REM sleep at sleep onset only in Children.
The serotonin and noradrenaline cells that modulate the brain during waking reduce their output by half during non-REM sleep but are shut off completely during REM sleep.
When the brain is intensely activated during REM sleep, motor output has to be actively block . Sleep waling behaviours are due to these motor behaviours are said to be ‘dissociated’ because normally they occur only during waking. The states are hybrids, with features both sleep and waking.
Serotonin and noradrenaline are two chemicals to be necessary for attention, learning, and memory (by implication for orientation and active reasoning).
The activation of the brain in sleep is necessary for us to reorder the information inside our heads, to get rid of certain obsolete memories, to update memories, and to incorporate new experiences into our memory systems. In addition to this cognitive function, the activation of the brain during sleep could have a lifelong development role. (REM sleep is far more prevalent in newborn infants than it is in adults).
Dreaming are related to the changes in the level of brain activation.
Independent from activation, the brain opens and closes its gates of sensor input and motor output. Thus as the brain self-activates in sleep, it shuts its gates so that outside information has difficulty accessing the brain. It is equally difficult for sleep-activated brain to realise the motor acts that it generates.
Dream changes its chemical climate radically. witout serotonin and noradrenaline, the dreaming brain cannot do certain things such as direct its thoughts, engage in analytical problem-solving, and remember its activities.
Interesting questions
Can dreams foretell future?
There is absolutely no scientific evidence for this theory and considerable scientific evidence against it.
Do we dream in black and white or in colour?
Modern lab evidence suggests strongly that we dream in colour.
Do animals dream?
Animals certainly can’t report dreams even if they do have them. We then go on to make the fairly safe assumption that animals have the same mechanisms of brain activation in sleep as we do.
Do babies dream?
We don’t (and can’t) know. But why not?
When does dreaming start?
Dreaming that are similar to those of adults start to appear tat about age three, when the infant is acquiring language and propositional thought. The upper brain circuits that support language and propositional thought must be functional in order for dreaming to occur.
Do blind people see in their dreams?
People who are blind from birth have no visual imagery at any time, neither in waking nor in dreaming. People with acquired blindness have developed perpetual capacities to recall the images where they have had previous vision.
Are men and women’s dreams different?
The emotion profiles in dreams of men and women were strikingly similar.
Source: Dreaming: An introduction to the science of sleep – J. Allan Hobson (2002)
Dreaming – mental activity occurring in sleep
Rapid Eye Movement (REM) sleep – eyes darted back and forth and up and down behind their close lids during sleep.
Not that dreaming occurs exclusively in REM sleep. It doesn’t. REM sleep just happens to provide the most ideal condition for occurrence.
REM sleep at sleep onset only in Children.
The serotonin and noradrenaline cells that modulate the brain during waking reduce their output by half during non-REM sleep but are shut off completely during REM sleep.
When the brain is intensely activated during REM sleep, motor output has to be actively block . Sleep waling behaviours are due to these motor behaviours are said to be ‘dissociated’ because normally they occur only during waking. The states are hybrids, with features both sleep and waking.
Serotonin and noradrenaline are two chemicals to be necessary for attention, learning, and memory (by implication for orientation and active reasoning).
The activation of the brain in sleep is necessary for us to reorder the information inside our heads, to get rid of certain obsolete memories, to update memories, and to incorporate new experiences into our memory systems. In addition to this cognitive function, the activation of the brain during sleep could have a lifelong development role. (REM sleep is far more prevalent in newborn infants than it is in adults).
Dreaming are related to the changes in the level of brain activation.
Independent from activation, the brain opens and closes its gates of sensor input and motor output. Thus as the brain self-activates in sleep, it shuts its gates so that outside information has difficulty accessing the brain. It is equally difficult for sleep-activated brain to realise the motor acts that it generates.
Dream changes its chemical climate radically. witout serotonin and noradrenaline, the dreaming brain cannot do certain things such as direct its thoughts, engage in analytical problem-solving, and remember its activities.
Interesting questions
Can dreams foretell future?
There is absolutely no scientific evidence for this theory and considerable scientific evidence against it.
Do we dream in black and white or in colour?
Modern lab evidence suggests strongly that we dream in colour.
Do animals dream?
Animals certainly can’t report dreams even if they do have them. We then go on to make the fairly safe assumption that animals have the same mechanisms of brain activation in sleep as we do.
Do babies dream?
We don’t (and can’t) know. But why not?
When does dreaming start?
Dreaming that are similar to those of adults start to appear tat about age three, when the infant is acquiring language and propositional thought. The upper brain circuits that support language and propositional thought must be functional in order for dreaming to occur.
Do blind people see in their dreams?
People who are blind from birth have no visual imagery at any time, neither in waking nor in dreaming. People with acquired blindness have developed perpetual capacities to recall the images where they have had previous vision.
Are men and women’s dreams different?
The emotion profiles in dreams of men and women were strikingly similar.
Source: Dreaming: An introduction to the science of sleep – J. Allan Hobson (2002)
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