Dual brain theory
The hemisphere model is a popular science adaptation neuroscientific findings on lateralization of the brain. It explains simplifies the functioning of the brain, but is now considered obsolete.
Idea
Basic idea of the hemisphere model is the assumption that both halves of the brain are specialized differently ( for mostly rational or mostly emotional processes). Thus it is assumed that only the left hemisphere access to " wake consciousness" have and rational, linguistic, analytical, time- linear and logical processes -processing, while the right brain "holistic, pictorial, artistic, creative, intuitive, timeless, spatial, emotional and body-oriented " is. It is still partially the basis for methods of psychological research.
The idea originally came from the observation that people can with durchtrenntem corpus callosum often not read or recognize words that are presented in their left hand, evaluated by the right hemisphere visual field. This suggested that the cerebral hemispheres have separate tasks, and that language functions are localized only in the left hemisphere.
The current state of research is that the cerebral hemispheres have different information processing methods, namely along the above scheme, but these only reflect priorities or preferences and non-exclusive competences. Thus, the left hemisphere is responsible for the processing of linguistic content in most individuals. With regard to other cognitive functions can be found in summary that non-linguistic functions are less lateralized. With regard to the language dominance of the left hemisphere recent work has shown that the right hemisphere to language processing has appreciable share. Therefore Köhler and Bruhn come to the conclusion that applies " the hemisphere model so-called" obsolete. A good pictorial representation of the current state of research can be found here under the links.