Cerebral Lateralization and Functionality Essay

250 WordsJun 2, 20131 Page
Cerebral Lateralization and Functionality University of Phoenix PSY/ 240 There are many theories that have been proposed to explain why cerebral lateralization of function evolved. The Analytic-Synthetic Theory of cerebral asymmetry holds that there are two basic modes of thinking, analytic mode, and synthetic mode. According to the text “These two modes of thinking have become segregated during the course of evolution in the left and right hemispheres, respectively.” This theory sates that the left hemisphere operates more logically, and analytically. While the right hemisphere according to the text, “is primarily a synthesizer”. According to a second theory of cerebral asymmetry, the motor theory of cerebral asymmetry, the left hemisphere is specialized not for the control of fine movements, of which speech is only one category. The texts explained that one bad part of the motor theory of cerebral asymmetry is that it does not suggest why motor function became lateralized in the first place. A third theory of cerebral asymmetry is the linguistic theory of cerebral asymmetry. The text explains that the primary role of the left hemisphere is language. The linguistic theory of cerebral asymmetry is based to a large degree on the study of deaf people who use American Sign Language, or ASL. Lastly, The motor theory of speech perception proposes hat the perception of speech depends on the words activating the same neural circuits. The main thesis of the motor theory of speech perception is that motor cortex plays a role in language

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