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Nearest-neighbor CD distances for descending and ascending segments of a single loop of Henle (same loop shown in Fig. 3) at fractionated lengths along the corticopapillary axis. A: the DTL lies farthest away from the CDs at the OM-IM boundary and it nearly contacts CDs at its terminus (the prebend). B: the ATL lies near CDs for most of its length upon ascent but moves away from CDs as it nears the OM-IM boundary.
