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- W1968755440 abstract "Natural selection operates on phenotypic variation that exists within a population. Variable aspects of cortical organization, such as the size and connections of a cortical field, can generate differences in behavior, which is a target of natural selection. Yet studies pertaining to within-species variability in cortical organization are limited. In the present investigation, we examined variation in brain size, cortical sheet size, and primary sensory cortical field sizes in the adult short-tailed opossum (Monodelphis domestica). Within individuals, we found no significant difference between the right and left hemispheres in the overall size of the dorsolateral cortex or in primary cortical field sizes. Between individuals, we found relatively little intraspecies variation in brain weight, brain volume, and cortical sheet area for the dorsolateral neocortex and pyriform cortex; however, we observed a large degree of variability in body weight and primary sensory cortical field size, as defined by myeloarchitecture. Further, we found that the size of each cortical field correlated with the size of the other cortical fields as well as with the total size of the dorsolateral cortex. Here we discuss the possible sources of variation and examine the relationship between cortical field size and sensory processing abilities and behaviors across species. Since behavior is the target of natural selection, variation in cortical field size across individuals may supply the raw material necessary for cortical field evolution." @default.
- W1968755440 created "2016-06-24" @default.
- W1968755440 creator A5027223190 @default.
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- W1968755440 date "2006-10-27" @default.
- W1968755440 modified "2023-10-15" @default.
- W1968755440 title "Phenotypic diversity is the cornerstone of evolution: Variation in cortical field size within short-tailed opossums" @default.
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- W1968755440 doi "https://doi.org/10.1002/cne.21156" @default.
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