TY - CHAP M1 - Book, Section TI - Sphenopalatine Ganglion Block A1 - Narouze, Samer A2 - Diwan, Sudhir A2 - Staats, Peter S. PY - 2015 T2 - Atlas of Pain Medicine Procedures AB - The sphenopalatine ganglion (SPG) is a large extracranial structure that has rich sympathetic and parasympathetic autonomic innervations, which explains the autonomic features associated with cluster headache. Cluster headache involves activation of the parasympathetic outflow from the superior salivary nucleus of the facial nerve, predominantly through the SPG.1 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1107196755 ER -