[The main hypothesis of hemi-neglect phenomenon development].
A review of the main hypotheses of unilateral ignoring development is presented. One part of them fail to answer the question whether the right hemisphere is preferentially interested in ignoring development, the other one does not answer the question why only the stimuli entering the right hemisphere are not recognized (e.g. in the animals who showed space left-side ignoring in the absence of speech). The author suggests that answering these questions lies in different ways of information processing by the right (simultaneous way) and left (successive way) hemispheres and their reciprocal interaction. The right hemisphere processes information more rapidly using simultaneous way, it seems to be more diffusive, in regard to functions being represented. The left hemisphere, which is slower and more local, regarding the function representation, compares current information stimuli with the "traces" of previous ones. Just this slower information processing with "trace" comparing is likely to enable the left hemisphere to recognize stimuli. From the right hemisphere, information for cognition has to be "thrown over" to the left hemisphere over the corpus callous. In case of right hemisphere or corpus callous damage, an amount of stimuli entering the left hemisphere is not enough for recognition, and unilateral ignoring developes.
Buklina
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D000818:Animals; D001921:Brain / Q000503:physiopathology*; D003337:Corpus Callosum / Q000503:physiopathology; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D010468:Perceptual Disorders / Q000503:physiopathology*