Types of ostia nasolacrimalia in man and their genetic significance
✍ Scribed by Schaeffer, J. Parsons
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1912
- Tongue
- English
- Weight
- 468 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0002-9106
No coin nor oath required. For personal study only.
✦ Synopsis
During a reccrit investigation on the geriesis arid development of thc nasolacrimal passages in man, m y at'terition was frequently directed to the marked variations that exist, in the adult, in thc manner of communication between the duct us nasolacriinalis arid thc meatus nasi inferior. I, therefore, wish in this note to refer to the principal types of ostia nasolacrirnalia found, and to call attention to their probable genetic significance.
At the outset I may say, according to the niaterial stadiecl, that the ostiuin of the ductus nasolacrimalis i s invariably located somewhere on the ventral portion of the lateral wall of the meatus nasi inferior. The variations encountered are diic to diffcrenees in type, position within the above limits, and to duplication. Xotwithstanding that the large series of specimens examined for the substance of this communication invariably prcserited the ostiurn of the duct,us nasolacrimalis on the lateral wall of the meatus nasi inferior, Geddesl reports an unusual and apparently unique abnoriiiality in an Irish male subject of the age of twentyeight years, in which the ductus nasolacrirnalis communicated with the meatus nasi mcdius. I will refer. to this unusual alinormality in a subsequent paragraph.
Within the limits of the ventral portion of the lateral wall of the meatus nasi inferior there is considerable variation as to the An abnormal nasal duct. .hiatom. AIU., Bcl. 37. no. I , 1910.