For more information on the cervicomedullary junction and its connection to symptoms of Dysautonomia, see: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4362313/ and https://www.ncbi.nlm.nih.gov/books/NBK400/ Another good source for information on Dysautonomia: http://www.dysautonomiainternational.org/