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. Author manuscript; available in PMC: 2015 Dec 29.
Published in final edited form as: Dev Biol. 2013 Jul 6;382(1):305–319. doi: 10.1016/j.ydbio.2013.06.029
Rules for ENC movement on axons

  1. Cell contact (axon-related) rule, whereby ENC agents encountering an axon, prefer to move onto the axon.

  2. Cell-axon interaction rule, whereby ENC agents are biased to remain in contact with any axon they encounter.

  3. Cell movement (axon-related) rule, whereby a ENC agent's movement is biased to follow an axon, but is not directionally biased “up” or “down” the axon.