神経堤
The origin of Perisynaptic (Terminal) Schwann Cells was largely under question in the 1960s as there were arguments on whether the cells were of epithelial or glial descent, but the development of PSCs has been linked to Neural crest origin. As described above, PSCs are a type of non-myelinating Schwann cell, which develop from neural crest cells. The general series of developmental events can be summarized as this: Neural Crest cells develop into Schwann cell precursors which further develop into Immature Schwann cells which then differentiate into Myelinating Schwann cells and non-Myelinating schwann cells of which Perisynaptic Schwann cells are a subset.