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- Psychology
- Right Brain, Left Brain
-
- The article in which I chose to examine is called Right Brain, Left Brain:
- Fact and Fiction, written by Jerre Levy. In the past fifteen years or so
- there has been a lot of talk of left brain and right brain people. Levy's
- reason for righting this article was clearly to stop the misconceptions and
- show the truth about how our brain hemispheres operate.
- Levy first explores the myth of the left brain and right brain theory.
- She states that generally people see the left hemisphere of the brain
- controlling logic and language and the right, creativity and intuition. In
- addition people differ in their styles of thought, depending on which half
- of the brain is dominant. She believes that most of what these notions
- state is farce.
- Next the article explores the history of this fascination of the left and
- right hemispheres of the brain. Apparently the study of this aspect of the
- brain traces back to time of Hippocrates. Levy weaves in and out of the
- various theories and prominent people known for contributing to the
- confusion. It wasn't until 1962 when Roger W. Sperry began experimenting
- on certain aspects of the brain that contribute to the truth of the left
- and right brain theory. Sperry studied people who had undergone surgical
- division of the corpus callosum, the bridge between the two hemispheres.
- His studies showed that, "an object placed in the right hand (left
- hemisphere) could be named readily, but one placed in the left hand
- (nonverbal right hemisphere) could be neither named nor described.
- Next to branch off of Sperry's studies was psychologist Doreen Kimura.
- Kimura developed behavioral methods which involved presenting visual
- stimuli rapidly to either the left or right visual fields. Another
- important method developed was "dichotic listening" which centered around
- the use of sound to study the hemispheres. Through these tests and the
- continual study the theory that the left brain controlled ended. Instead a
- new theory was born known as the two-brain theory. This said that at
- different times one of the two hemispheres would be operating. An example
- of this is that the right hemisphere is in control when an artist paints
- but the left hemisphere was in control when a novelist wrote a book.
- This theory failed because of one physical studies showed that people with
- hemispheres surgically disconnected could operate in everyday life. Also,
- research demonstrated that each hemisphere had its own functional
- expertise, and that the two halves were complementary.
- Next, the article states its worth. The author shows the up to date
- agreed upon theory of the two hemispheres in five simple points.
- 1. The two hemispheres are so similar that when they are disconnected by
- split-brain surgery, each can function remarkably well, although quite
- imperfectly
- 2. Although they are remarkably similar they are also different. The
- differences are seen in contrasting contributions. Each hemisphere
- contributes something to every action a person takes.
- 3. Logic is not confined to the left hemisphere. Although dominant in the
- left logic is present in the right hemisphere.
- 4. There is no evidence that either creativity or intuition is an
- exclusive property of the right hemisphere. Same theory as #3.
- 5. Since the two hemispheres do not function independently, and since each
- hemisphere contributes its special capacities to all cognitive activities,
- it is quite impossible to educate one hemisphere at a time in a normal
- brain.
- Levy comes to the conclusion that people are not purely left or right
- brained. There is a continuum in which the hemispheres work together in
- harmony. Often the left or right hemisphere is more active in some people
- but it is never the sole operator. She concludes, "We have a single brain
- that generates a single mental self."
- Compared to what we did in class related to the left and right hemispheres
- of the brain, both what we learned and the article taught were extremely
- similar. Our exercise showed that we are not left or right brained but
- merely somewhere on the scale between left and right brain. Some of us were
- extreme left, few extreme right and most in the middle leaning left a bit
- (this is where I fell).
- I could not agree more with what we did in class and the article I read.
- The author wrote a fabulous complete article. In my summary which probably
- was a little lengthy, I feel I am not doing the author just. She had so
- much wonderful background that there was no way to include it all. She
- introduced the problem at hand and explored every aspect of the subject
- showing other's views and previously excepted theories. After all was said
- she introduced her (generally accepted) theory in a simple well thought out
- five point system that suited the novice as well as the expert.
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