(A–F) Morphological analysis of central projections at lumbar level L3 of PV+ DRG neurons (A–C) or all DRG sensory afferents after application of fluorescently labeled dextran to individual dorsal roots (D–F) in P0.5 (A–C) or P5 (D–F) wild-type (A and D), Er81−/− (B and E), and Er81EWS-Pea3/− (C and F) mice. Red dotted line indicates intermediate level of spinal cord.