Brain Facts (Gray Matter) - download pdf or read online

By Louis Vera-portocarrero, Eric H. Chudler

Identifies the weird evidence that encompass the examine of the human mind. This identify additionally takes a glance at how the mind works, the place within the mind its significant capabilities dwell, and the way different components of the mind engage with one another to supply the human adventure.

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Most dreams experienced over the course of a night are quite ordinary. There are exceptions, where external stimuli, such as noises or tactile stimulation, can become incorporated into dreams. Dreams have an undeserved reputation of being bizarre because our Nightmares and Night Terrors Nightmares are intense, frightening dreams that lead to waking. They are more common than night terrors. Night terrors are attempts to fight or flee, accompanied by panic and sometimes bloodcurdling screams. Nightmares occur during dream sleep, but night terrors occur during stage 4 sleep.

In general, a person’s mood, anxiety, and expressiveness in dreams are positively correlated with these traits in their waking experience. Except for some decrease in the clarity of background detail and color saturation, visual dream imagery resembles waking visual imagery. Like waking imagery, most dreams are in color. Perhaps the greatest difference between dreaming and ordinary wakefulness is that we are able to differentiate between real and imagined images only when we are awake. Except for the relatively rare lucid dreams in which we know we are dreaming, all dream images seem real.

The Process of Sleep Sleep is a state of unconsciousness during which there is altered electrical activity in the cerebral cortex and from which a person can be aroused by external stimuli. When signals from the RAS slow down so that the cerebral cortex is deprived of activating input, a person may lapse into sleep. For this reason, we find it easy to go to sleep, even when we are not particularly tired, if there is nothing interesting to occupy the mind. But although we tend to be wakeful in the presence of attention-holding stimuli, there is a limit beyond which sleep is inevitable.

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