Assertion: cerebral cortex's layer | /r/AtLocation | placental mammals
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Source sentences:
text: (p. 746) now show that, in mice, two radial glial cell subtypes appear to be specified at the onset of cortical development: one for neurons of the evolutionarily older lower cortical layers and a second for the upper cortical layers that are present in placental mammals and are enlarged in primates, especially humans.