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Effects of Brain Laterality on Decoding Accuracy for Facial Displays of Emotion
Unformatted Document Text:  Effects of Brain 8 Hemispheric Dominance and Facial Recognition Brain-related research has substantial implications for communication. Specifically, the encoding and decoding of messages is controlled by the information processing of the brain. How the brain processes information in general, whether in predominantly “right brained” ways or predominantly “left brained” ways, could influence the decoding of messages in particular. Subsequently, we discuss modular theories of the brain, brain-related research in general and the different types of hemispheric dominance. Finally, we discuss how differences in hemispheric dominance could affect the decoding of facial emotion. To understand the possible implications of hemispheric dominance, we must first examine some basic neuroanatomocal concepts. The brain is divided into two halves by what is known as the longitudinal fissure. These halves are named the right and left cerebral hemispheres. The two hemispheres of the human brain generally perform different functions even though they are connected by the corpus callosum, which consists of the largest set of associate fibers in the brain (Springer & Deutsch, 1985). The main function of the corpus callosum is to keep each hemisphere aware of the activities of the other (Gazzaniga, 1985). Each hemisphere functions to control the body’s opposite side. For example, the left hemisphere controls the right arm and the right hemisphere the left. Furthermore, information arriving from one half of the body is initially transmitted to the opposite hemisphere (Andersen, Garrison, & Andersen, 1979). Recently, the most prominent and supported contemporary theory of the brain is modular theory (Stacks & Andersen, 1989). It states that left and right hemispheres function as two control centers, each responsible for certain functions. For example, the left hemisphere is employed for the functions of language, whereas the right hemisphere is utilized for nonverbal

Authors: Floyd, Kory. and Mikkelson, Alan.
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Effects of Brain 8
Hemispheric Dominance and Facial Recognition
Brain-related research has substantial implications for communication. Specifically, the
encoding and decoding of messages is controlled by the information processing of the brain.
How the brain processes information in general, whether in predominantly “right brained” ways
or predominantly “left brained” ways, could influence the decoding of messages in particular.
Subsequently, we discuss modular theories of the brain, brain-related research in general and the
different types of hemispheric dominance. Finally, we discuss how differences in hemispheric
dominance could affect the decoding of facial emotion.
To understand the possible implications of hemispheric dominance, we must first
examine some basic neuroanatomocal concepts. The brain is divided into two halves by what is
known as the longitudinal fissure. These halves are named the right and left cerebral
hemispheres. The two hemispheres of the human brain generally perform different functions
even though they are connected by the corpus callosum, which consists of the largest set of
associate fibers in the brain (Springer & Deutsch, 1985). The main function of the corpus
callosum is to keep each hemisphere aware of the activities of the other (Gazzaniga, 1985). Each
hemisphere functions to control the body’s opposite side. For example, the left hemisphere
controls the right arm and the right hemisphere the left. Furthermore, information arriving from
one half of the body is initially transmitted to the opposite hemisphere (Andersen, Garrison, &
Andersen, 1979).
Recently, the most prominent and supported contemporary theory of the brain is modular
theory (Stacks & Andersen, 1989). It states that left and right hemispheres function as two
control centers, each responsible for certain functions. For example, the left hemisphere is
employed for the functions of language, whereas the right hemisphere is utilized for nonverbal


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