The brain functions through nerve cell circuits. Communication between neurons is both electrical and chemical. Chemicals called neurotransmitters carry signals from one neuron to another. One neuron may communicate with thousands of other neurons, and many thousands of neurons are involved in even the simplest behavior.

Each brain hemisphere is specialized and dominates the other in certain functions. This dominance is related to whether a person is right-handed or left-handed. In most right-handed people, the left hemisphere processes arithmetic, language, and speech. The right hemisphere interprets music, complex imagery, spatial relations, and emotions. In left-handed people, the pattern of brain organization is more variable.

Handedness has a strong, but not perfect, correlation with the hemisphere of the cerebrum on the bra

Many illusions are based on the fact that you have two eyes. The movements of your eyes can also cause illusions. Illusions often occur when your eyes are distracted, or drawn away by lines or objects; within or close to the line or object you are viewing. Background is an important part of an objects surroundings.

Light and dark plays a role in what is seen in an optical illusion. When bright lights fall on the retina of the eye, there occurs a slight spreading effect, so a greater portion of the retina responds to the point actually lighted. People who are large appear much bigger in light cloths. Although we have two eyes for seeing we can look at only one thing at a time. The eyes always adapt themselves to the distance of the object that is being seen. We depend on both of our eyes to give us the feeling of depth and roundness and depth in objects. The further away the object is, the shorter the distance we can see around it is. Normal illusions are called normal because everybody with normal eyesight experiences them. But optical illusions do not occur every time we are deceived by what we see. Often we make some mistakes in interpreting the impressions our eye receives.

2. Second I gathered information about the subject. I looked at the school library and I used the internet to assist me.

5. Next I choose three right-handed people and 2 left-handed people to look at several optical illusions.(i.e. Old/Young woman, Duck/bunny)

By the information I have collected, and

Some common words found in the essay are:
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Approximate Word count = 1013
Approximate Pages = 4 (250 words per page double spaced)