| 词汇 | example_english_dorsal-cortex |
| 释义 | dorsal cortexcollocation in Englishmeanings of dorsaland cortexThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with cortex. dorsal adjective[before noun] uk /ˈdɔː.səl/ us /ˈdɔːr.səl/ of, on, or near the back of ... See more at dorsal cortex noun[C] uk /ˈkɔː.teks/ us /ˈkɔːr.teks/ the outer layer, especially of the brain and ... See more at cortex Examples of dorsal cortexThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. A similar process might have occurred in the phylogeny of mammals, once the dorsalcortex had acquired those developmental mechanisms leading to the six-layered architecture. In other words, they intend to explain how to transform gradually a reptilian dorsalcortex into a mammalian isocortex. It is suggested that the dorsalcortex of reptiles expanded in this dorsalizing process to become both entorhinal/subicular cortex and sensory neocortex. The small dorsal pallium in amphibians is likely to be homologous to the dorsalcortex of reptiles and the hyperpallium of birds. Interposed between the medial and the dorsalcortex, a dorsomedial cortex is observed in many reptiles. Rather, these effects are consistent with the dorsalcortex being similar to entorhinal/subicular cortex. It might be necessary to know the mechanism that allowed the dorsalcortex in mammals to expand in order to understand cortical evolution. They propose the reptilian dorsalcortex to be the ancestral brain structure to the mammalian isocortex. In the reptilian dorsalcortex, the cortical plate remained as one cell-dense layer that is subdivided into few, poorly segregated cortical areas. But why did the dorsalcortex expand in mammals and not in reptiles? These pathways end in the reptilian dorsalcortex and in the mammalian somatosensory cortex. Rather, the dorsalcortex seems to be involved in learning and memory. This, however, does not explain the differentiation of the dorsalcortex that is essential for complex behavior. The persistent expression of particular homeotic genes in dorsal areas of mammals could allow the specification of intermediate cell phenotypes within the dorsalcortex territory. In this case, the most likely candidate for homology with the isocortex is the reptilian dorsalcortex, which derives from the dorsal pallium. We consider that, at this point, evidence tends to favor correspondence of the isocortex with the dorsalcortex of reptiles. It should be noted that only turtles among reptiles seem to have a visual thalamic projection to the dorsalcortex. According to the authors, the dorsalcortex in reptiles is the main ancestral structure to the isocortex in mammals. Perhaps the dorsalcortex of reptiles enlarged and subdivided to form both subicular/entorhinal and neocortical subdivisions in mammals. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Want to learn more? Go to the definition of dorsal Go to the definition of cortex See other collocations with cortex |
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