The limbic system is the general name for the brain tissue evolved from the paleocortex and old cortex in the central nervous system of higher vertebrates and the neural structures and nuclei that are closely related to these tissues. The palea and old cortex are the basic structures separated by the neocortex.
Important components of the limbic system include hippocampal formation, parahippocampal gyrus and entorhinal zone, dentate gyrus, cingulate gyrus, mammillary body, and amygdala. The above structures are interconnected by the Papez loop [Papez loop] and have extensive connections with other brain structures (neocortex, thalamus, brainstem), so the limbic system acts to make the midbrain, diencephalon, and neocortex structure There was an exchange of information.
Through the connection with the hypothalamus and the autonomic nervous system, the limbic system participates in the mediation of instinctual and emotional behaviors. Its role is its own survival and species continuation. In addition, the hippocampus structure also plays an outstanding role in the learning process and memory. Therefore, if the structure of the hippocampus or the structure associated with it is impaired, then the syndrome of forgetting will result. The lesions are different, and the resulting forms of memory impairment are also different.
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