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a) The right hemisphere has more control over emotion than left hemisphere. [n 2] b) The right hemisphere is dominant in emotional expression in a similar way that the left hemisphere is dominant in language. c) The right hemisphere is dominant in the perception of facial expression, body posture, and prosody.
The best example of an established lateralization is that of Broca's and Wernicke's areas, where both are often found exclusively on the left hemisphere. Function lateralization, such as semantics, intonation, accentuation, and prosody, has since been called into question and largely been found to have a neuronal basis in both hemispheres. [6]
[1] [2] It refers to the construction of explanations by the left brain hemisphere in order to make sense of the world by reconciling new information with what was known before. [3] The left-brain interpreter attempts to rationalize, reason and generalize new information it receives in order to relate the past to the present. [4]
Research comparing the effects of lesions in the two hemispheres, split-brain patients, and perceptual asymmetries have aided in the knowledge of speech lateralization. In one particular study, the left hemisphere's sensitivity to differences in rapidly changing sound cues was noted (Annett, 1991).
The Geschwind–Galaburda hypothesis has garnered empirical support from a number of studies. For instance, Witelson et al. discovered that Einstein’s brain exhibited an atypical pattern of cerebral lateralisation, which supports the hypothesis that brain lateralisation is related to cognitive abilities. [4]
The left hemisphere is associated with language and calculations, while the right hemisphere is more closely associated with visual-spatial recognition and facial recognition. This lateralization of brain function results in some specialized regions being only present in a certain hemisphere or being dominant in one hemisphere versus the other.
On the other hand, pitch perception, such as singing and linguistics related to emotion, are believed to be organized in the right hemisphere. This belief led to the development of the "Functional Lateralization" hypothesis, stating that dysprosody can be caused by lesions in either the right or left hemispheres. [3]
Michael S. Gazzaniga (born December 12, 1939) is an American psychologist who is a professor of psychology at the University of California, Santa Barbara, where he heads the new SAGE Center for the Study of the Mind. [2]