RT Book, Section A1 Waxman, Stephen G. SR Print(0) ID 1186188551 T1 Development and Cellular Constituents of the Nervous System T2 Clinical Neuroanatomy, 29e YR 2020 FD 2020 PB McGraw-Hill Education PP New York, NY SN 9781260452358 LK neurology.mhmedical.com/content.aspx?aid=1186188551 RD 2024/04/16 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.