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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]
In the mid-19th century scientists first began to make discoveries regarding lateralization of the brain, or differences in anatomy and corresponding function between the brain's two hemispheres. Franz Gall, a German anatomist, was the first to describe what is now known as the Doctrine of Cerebral Localization. Gall believed that, rather than ...
The lateralization is extremely apparent in the anterior cingulate cortex (ACC) and anterior insular cortex (AI) associated with higher emotions such as romantic love and motivation correlated with homeostatic functions. The left AI and ACC are more active during feelings of romantic love and maternal attachment.
The functional specialization of these hemispheres are offering insight on different forms of cognitive behaviour therapy methods, one focusing on verbal cognition (the main function of the left hemisphere) and the other emphasizing imagery or spatial cognition (the main function of the right hemisphere). [14]
Visual information can be transferred from one cerebral hemisphere to the other in as little as 3ms, [8] [9] so any task differences greater than 3ms may represent asymmetries in neural dynamics that are more complex than a single hemisphere's simple dominance for a particular task. Moreover, the divided visual field technique represents a ...
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).
Consequently, the left side of the forebrain mostly represents the right side of the body, and the right side of the brain primarily represents the left side of the body. The contralateral organization involves both executive and sensory functions (e.g., a left-sided brain lesion may cause a right-sided hemiplegia).
Left-brain interpretation is a case of the lateralization of brain function that applies to "explanation generation" rather than other lateralized activities. [5] Although the concept of the left-brain interpreter was initially based on experiments on patients with split-brains , it has since been shown to apply to the everyday behavior of ...