By Georg F. Striedter
Mind evolution is a posh weave of species similarities and adjustments, sure via various ideas or rules. This booklet is a close exam of those rules, utilizing information from a wide range of vertebrates yet minimizing technical information and terminology. it truly is written for complicated undergraduates, graduate scholars, and extra senior scientists who already be aware of whatever approximately "the brain," yet need a deeper realizing of the way diversified brains advanced. The e-book opens with a quick background of evolutionary neuroscience, then introduces many of the teams of vertebrates and their significant mind areas. The center of the textual content explores: what points of mind association are conserved around the vertebrates; how brains and our bodies replaced in dimension as vertebrates advanced; how person mind areas are inclined to bring up or reduce in measurement; how areas can develop into structurally extra (or much less) advanced; and the way neuronal circuitry evolves. A principal subject emerges from those chapters?—that evolutionary adjustments in mind measurement are inclined to correlate with many different elements of mind constitution and serve as, together with the proportional dimension of person mind areas, their complexity, and their neuronal connections. to give an explanation for those correlations, the e-book delves into ideas of mind improvement and asks how alterations in mind constitution influence functionality and behaviour. the 2 penultimate chapters reveal the applying of those ideas, targeting how mammal brains diverged from different brains and the way Homo sapiens advanced a really huge and "special" mind.
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Additional info for Principles of Brain Evolution
Sample text
Mouse lemurs (Microcebus) are small (up to 60 g), run like rodents, and eat insects as well as fruits. The indri and sifakas (Propithecus) are large animals (up to 1 m long). The aye-aye specializes in prising insects larvae from tree bark and fills the niche of woodpeckers. At least 15 species of subfossil lemur species in 8 or more genera reveal the ‘big’ end of the radiation. Archaeolemur lived on the ground and was about the size of a female baboon. The 77-kg Megaladapis was arboreal with a niche similar to that of a koala.
BIOGEOGRAPHICAL PROCESSES I 1222 2 3 4 5 6 7 8 9 10 1 2 3 4222 5 6 7 8111 9 20 1 2 3 4 5 6 7 8 9 30111 1 2 3 4 5 6 7 8 9 40 1 2 3 4 6222 Geography can be important – widespread species are less likely to go extinct than species with restricted ranges. This is because restricted range species are more vulnerable to chance events, such as a severe winter or drought. In a widespread species, severe events may cause local extinctions but are not likely to cause a global extinction. This generalization is borne out by defaunation experiments on red mangrove (Rhizophora mangle) islands in the Florida Keys, USA, where the insects, spiders, mites, and other terrestrial animals were exterminated with methyl bromide gas (see Simberloff and Wilson 1970).
Species that decline to obey Bergmann’s rule include the capercaillie (Tetrao urogallus), which is smaller in Siberia than in Germany. Also, many widespread Eurasian and North American bird species are largest in the highlands of the semi-arid tropics (Iran, the Atlas Mountains, and the Mexican Highlands), and not in the coldest part of their range. g. Lindsey 1966). The explanation of Bergmann’s rule is the subject of much argument, but climate does appear to play a leading role (see Yom-Tov 1993).