THE TEMPORAL BONE: An Anatomic and Clinical Study

THE PURPOSE of this exhibit is to demonstrate the various cell groups of the temporal bone: I. MASTOIDOANTRAL Squamous Occipital Zygomatic Mastoid II. PETROUS Precarotid Infralabyrinthine Postcarotid Apical Supracarotid Precochlear Subtubal Certain specimens show unusual extension of some cell groups. Dense septa separating various groups are demonstrated. A correlation is shown between the different roentgenographic positions and the information to be derived from each, with drawings and specimens. A correlation between mastoid pneumatization and age is demonstrated by means of x-ray studies. Over-all view of exhibit. Specimen demonstrating relationship of the tympanomastoid suture to the facial nerve. A wire demonstrates the course of the nerve. Specimen showing course of a large mastoid emissary vein vulnerable at mastoidectomy. Specimen showing relationship of the outer part of the tympanomastoid suture to the facial nerve. The nerve course is depicted by a string. Specimen showing a tympanomastoid tract (indicated by wire bristle) extending