(or Viviana) is also listed as an intercessor for persons with mental illness on the Roman Catholic lists. She, too, lived before the tragic schism of 1054. She was martyred under Emperor Julian the Apostate.
Her life is profiled on the website of the Antiochian Orthodox Christian Archdiocese of North America: http://www.antiochian.org/node/17083
Image from http://www.magnificat.ca/cal/engl/12-02.htm