IN AN investigation based on an examination of more than 300 series of sections, covering specimens from the 6 mm. embryo to the 70 year old adult, the development of the temporal bone and its adult histological structure have been studied, with particular reference to pathological changes in the fissular region of the otic capsule.
In this report, which must be brief, the development of the fissular region and the neighboring portions of the otic capsule, the normal adult structure of the same regions and these pathological alterations which occur in and around the fissula which result in one form of deafness will be discussed.
The adult temporal bone is "petrous" only where it serves as a bed for the membranous labyrinth. The petrous part is only that portion which houses the otic labyrinth. Marrow and air spaces occupy much of the remaining portion. They are late fetal additions to
ANSON BJ. FISSULAR REGION OF THE OTIC CAPSULE IN RELATION TO OTOSCLEROSIS. AMA Arch Otolaryngol. 1950;52(6):843–847. doi:10.1001/archotol.1950.00700030870001
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