касательно мозга дельфинов, распределения плотности глии и ее роли: plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.0050139 - там все подробно.
цитаты из второй ссылки: "In the bottlenose dolphin, glial density was found to vary in different cortical areas from 28,000 to 93,200 cells/mm3, values rather similar to those in the human (average: 40,000–100,000 cells/mm3)"
"The number of gliocytes per number of neurons (glia/neuron ratio) is species-specific, i.e., varies among the mammalian groups and during ontogenesis owing to changes in neuron density. This basically implies that larger brains have higher glia/neuron ratios. Thus, the ratio rises from small rodents (mouse, rabbit: 0.35) via ungulate species (pig, cow, and horse: 1.1), the human (1.68–1.78) and the bottlenose dolphin (2–3.1), to large whales (fin whale: 4.54–5.85)"
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Date: 2013-02-24 05:32 pm (UTC)plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.0050139 - там все подробно.
еще: books.google.ru/books?id=2rkHQpToi9sC&lpg=PA147&ots=hDkvOu39ry&dq=glia%20neuron%20ratio%20in%20humans&hl=ru&pg=PA147#v=onepage&q=glia%20neuron%20ratio%20in%20humans&f=false
цитаты из второй ссылки: "In the bottlenose dolphin, glial density was found to vary in different cortical areas from 28,000 to 93,200 cells/mm3, values rather similar to those in the human (average: 40,000–100,000 cells/mm3)"
"The number of gliocytes per number of neurons (glia/neuron ratio) is species-specific, i.e., varies among the mammalian groups and during ontogenesis owing to changes in neuron density. This basically implies that larger brains have higher glia/neuron ratios. Thus, the ratio rises from small rodents (mouse, rabbit: 0.35) via ungulate species (pig, cow, and horse: 1.1), the human (1.68–1.78) and the bottlenose dolphin (2–3.1), to large whales (fin whale: 4.54–5.85)"