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anterior–posterior axis
anterior–posterior axis The anterior–posterior axis is the front-to-back direction along which the central nervous system is organized into segmental units called neuromeres.
The anterior–posterior axis is the front-to-back direction along which the central nervous system is organized into segmental units called neuromeres. In the source, changes along this axis are described as region-specific, with more anterior segments progressively differing from more posterior ground-state segments in their neural stem cells, lineages, and resulting neuromere size.