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Peripheral Brain.


pz3
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I read a couple of years ago in art class about how your brain / eyes perceive the world around you.

It was really intreasting and I forgot most of it but if any of you know of a good book on this subject please let me know.

It explained bassically everything about how your brain preceives what you see and what your eyes are limited to.

I would love to read it all again. I love knowing about this topic in depth.

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we supposibly only see about 1/3 of the True colors in the world.

a bumble bee supposibly can see like 3 billion more then us or somthing. This is very intreasting things to me, I wouldnt be able to put books like this down.

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I read a couple of years ago in art class about how your brain / eyes perceive the world around you. 

It explained bassically everything about how your brain preceives what you see and what your eyes are limited to.

Humans eyes can only detect visible light, we see different wavelenghts within this range as different colours. Most living things can detect wavelenghts in the visible specturm. Not all animals can see different wavelengths within the visible light spectrum as different colours. How they see the light depend on the type of photorecptors they have.We have two different types of photorecptor cells, rods and cones; Rods are more sensitive to light but do not distinguish colours while cones require more light than rods to be stimulated, they all contain pigments which are made up of opsins. Within the visible spectrum, red light has the longest wavelengthand least energy while violet had the shortest and the most energy. If say red light is shone into the eye, the blue and red cones are not stimulated at all, but the red is. The brain interprets this stimulus as blue. Different wavelenghts of light stimulates the three different types of cones to a different degree. Eqaul stimulation is interpreted as 'white'.

:rolleyes: Biology class is paying off.

EDIT: oh yeah, and colour blindness is when you are missing photopsins in your cones, or have fewer, which leads to colour weakness. The most common is lackign green or red photopsin which leads to red-green colour blindness. in Some rare cases, a person migth only have one type of cone which results in single colour vision.

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Your eyes enable you to view yourself in full color, even though color vision is not vital to life. The position of your ears gives you stereophonic hearing; thus you can locate the source of sounds.

ANOTHER superb organ is the human brain. It, together with the rest of the nervous system, is often compared to man-made computers. Of course, computers are constructed by humans and operate according to step-by-step instructions predetermined by human programmers. Yet, many people believe that no intelligence was responsible for “wiring” and “programming” the human brain.

Although extremely fast, computers handle only one piece of information at a time, whereas the human nervous system processes millions of pieces of information simultaneously. For example, during a stroll in the springtime, you can enjoy the beautiful scenery, listen to the song of birds, and smell the flowers. All these pleasant sensations are transmitted simultaneously to your brain. At the same time, streams of information flow from the sense receptors in your limbs, informing your brain of the moment-to-moment position of each leg and the state of each muscle. Obstacles in the footpath ahead are noticed by your eyes. On the basis of all this information, your brain ensures that each step is taken smoothly.

Meanwhile, the lower regions of your brain govern your heartbeat, breathing, and other vital functions. But your brain handles much more. As you walk, you can sing, talk, compare present scenes with past scenes, or make plans for the future.

“The brain,” concludes The Body Book, “is much more than a computer. No computer can decide that it is bored or wasting its talents and should embark on a new way of life. The computer cannot drastically alter its own program; before it sets out in a new direction, a person with a brain must reprogram it. . . . A computer cannot relax, or daydream, or laugh. It cannot become inspired or creative. It cannot experience consciousness or perceive meaning. It cannot fall in love.”

OF ALL the marvelous things on earth, none is more astounding than the human brain. For example, every second some 100 million bits of information pour into the brain from the various senses. But how can it avoid being hopelessly buried by this avalanche? If we can think about only one thing at a time, how does the mind cope with these millions of simultaneous messages? Obviously, the mind not only survives the barrage but handles it with ease.

2 How it does so is only one of the many wonders of the human brain. Two factors are involved. First, in the brain stem there is a network of nerves the size of your little finger. This network is called the reticular formation. It acts as a kind of traffic control center, monitoring the millions of messages coming into the brain, sifting out the trivial and selecting the essential for attention by the cerebral cortex. Each second this little network of nerves permits only a few hundred, at most, to enter the conscious mind.

3 Second, a further pinpointing of our attention seems to come about by waves that sweep the brain 8 to 12 times per second. These waves cause periods of high sensitivity, during which the brain notes the stronger signals and acts upon them. It is believed that by means of these waves the brain scans itself, in this way focusing on the essentials. Thus an amazing flurry of activity is going on in our heads every second!

4 In recent years scientists have made tremendous strides in studies of the brain. Even so, what they have learned is nothing compared to what remains unknown.

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