Ippocampo ed Amygdala

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[automatically translated] Important diseases of the central nervous system such as post-traumatic syndrome (PTSD stress) can cause structural and functional changes involving the amygdala axis - the hippocampus with the direct involvement of the prefrontal cortex, indicating the close functional relationship between these three brain regions. Regional blood flow increases and decreases in the hippocampus, nell'amygdala and in the medial prefrontal cortex as well as in the anterior and posterior cingulate often accompany disorders of the report and learning life. According to the visceral brain theory developed over sixty years ago by MacLean (1949), the pivot of the limbic system, the hippocampus would be represented at the base of the brain as a seahorse. This special training was considered the nerve center of the main receptive signals coming both from the outside world by means of visual functions, taste, smell, hearing and touch, both from the internal visceral. The pyramidal cells would form a kind of emotional keyboard that would have enriched the subjective memories. In subsequent research, MacLean (1952) thought that the hippocampal system were the information only in a very rough, being a brain too primitive (archeopallio) to analyze complex aspects of information as that generated by human language. However, he said MacLean, the hippocampus might be part of a nonverbal symbolism and have important repercussions in the learning sphere, since the symbolism affects the individual's emotional life. According to MacLean, it would seem that in the psychosomatic patient there is not any direct exchange between the visceral and brain that thinking and that the prodottisi emotional feelings in the hippocampal formation, instead of being transmitted to the intellect (neocortex) to be evaluated, find immediate expression through autonomous centers. Further research on monkeys carried out by Mishkin, M. et all. (1978, 1982, 1984), evidenziarono that in addition to the hippocampus, the amygdala was also part of the memory system. Already Milner B. (1965) had stressed the role of several cortical areas involved in memory processes. These areas were the visual cortex, auditory, and somatic who sent projections to transition areas (including neocortex and hippocampus), as perirhinal and parahippocampal. In turn,
Original languageItalian
Pages (from-to)1-44
Number of pages0
Publication statusPublished - 2012

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