a, b: P20 sagittal section highlighting the DMS. a: Individual DCX+ cells with migratory morphology oriented away from the dorsal lateral ventricle and towards the PSG. b: DCX+ cluster dorsal to the lateral ventricle. c, d: P20 coronal section highlighting the DMS. c: Individual DCX+ cells with migratory morphology oriented dorsally towards the PSG. d: Quantification of the decrease in DCX+ cell density over time. e: DCX+ cluster dorsal to the lateral ventricle. f: Quantification of the decrease in DCX+ cluster size over time. Scale bar a, b, c, e = 100μm.