The more one studies the temporal bone with its vital parts and associations, the more one realizes that this study still offers a great deal which is unknown. Various great anatomists, physiologists, surgeons and clinicians have their names, as a result of their work, attached to various parts of the bone, theories about it and clinical conditions affecting it.1 Herman Ferdinand von Helmholtz (1821-1894) in 1863 published his theory of hearing, "Tone Sensations"; Julius Richard Ewald (1856-1921) described the semicircular canals (semicircles of Ewald) and their part in equilibration; Henle's spine bears the name of Jacob Henle (1809-1885), who described it as a reliable guide in locating the antrum in surgical intervention in the mastoid region, and Sir William Macewen (1848-1924) methodically laid out the triangle (Macewen's triangle) as a guide in the mastoid operation. In addition, one can mention the depression of Wilde, the tubes of Eustachius, the hiatus