Anatomically and physiologically based guidelines for use of the sphenopalatine ganglion block versus the stellate ganglion block to reduce atypical facial pain.

This literature review is designed to develop guidelines needed for the use of a sphenopalatine ganglion block versus a stellate ganglion block to reduce atypical facial pain. We have reviewed the basic anatomy of both ganglia and the physiological responses usually associated with each, and have given an opinion on appropriate use of these therapeutic modalities.