All of these herbs are either supportive to the nervous system and/or grow the nervous system. ashitaba, gynostemma, bacopa monneria, gotu kola, holy basil, ginkgo biloba, rhodiola rosea, panax ginseng, amla, rosemary, ashwagandha, astragalus, lions mane, reishi, turkey tail, chaga, I'm sure there are others I'm not recalling.
I'll say it too... Fasting.... ;-) Fasting increases NGF...nerve growth factor.
Hyperthermic conditioning increases NGF. ----hot sauna. Dr. Rhonda Partick has info on this.
Berries are said to be very good to regrow neurological tissue...with herbs, it's accelerated. Dr. Robert Morse
Julian Gerona - I've seen a couple of your posts, you may like this...it sounds like you're doing some studying on the subject of health/healing/regeneration. Information on the lymphatic system...actually here's a simple search on youtube. Lymphatic system