RT Book, Section A1 Waxman, Stephen G. SR Print(0) ID 1137636958 T1 Development and Cellular Constituents of the Nervous System T2 Clinical Neuroanatomy, 28e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071847704 LK neurology.mhmedical.com/content.aspx?aid=1137636958 RD 2024/04/18 AB Early in the development of the nervous system, a hollow tube of ectodermal neural tissue forms at the embryo's dorsal midline. The cellular elements of the tube appear undifferentiated at first, but they later develop into various types of neurons and supporting glial cells.