P0, P2 and P10 spinal cord and brain. (A,B,D) FORSE‐1 expression in the spinal cord at P0, P2 and P10 respectively. (C) Nestin, FORSE‐1 and DAPI expression at P2. (E,G,I) FORSE‐1 expression in the forebrain at P0, P2 and P10, respectively. (F,H) FORSE‐1 expression in the brainstem. lv, lateral ventricle. Scale bar: (A,B,D‐I) 400 μm; (C) 200 μm.