By 1908, reports of extensive anatomic studies of the nasal sinuses had been made by Zuckerkandl,1 Grünwald,2 Onodi3 and Killian.4 It was at this time that an American rhinologist, Dr. Greenfield Sluder,5 published the first of his many important contributions to the anatomic, clinical, pathologic and therapeutic phases of disease of the posterior nasal sinuses and the nervous structure affected by it.
Since then, owing chiefly to Sluder's work, the sphenopalatine ganglion has become of great importance in the consideration of the neuralgias about the face. These neuralgias may be grouped in three main types: (1) the true trigeminal neuralgias, (2) the pseudotrigeminal neuralgias, and (3) the sphenopalatine and vidian neuralgias.
Many contributions to the knowledge of the first and second groups have come from the work of Dr. Harvey Cushing.
Sluder has done pioneer work in the matter of the sphenopalatine neuroses and vidian