Anatomical variations of the chorda tympani nerve observed during middle ear surgeries-an institutional study
Journal Title: INTERNATIONAL JOURNAL OF RECENT TRENDS IN SCIENCE AND TECHNOLOGY - Year 2016, Vol 21, Issue 1
Abstract
Objectives: The aim of this study is to describe observed variations in the middle ear anatomy of the chorda tympani nerve during middle ear surgeries in our institution. Study Design: A prospective study of 2 years covering 100 middle ear surgeries analyzing the course of the chorda tympani nerve in the middle ear. The surgeries were subdivided into myringoplasty (78 cases) and mastoidectomy with tympanoplasty (22 cases). Results: Chorda tympani nerve anatomy was observed based on its entry into the middle ear from the junction of the posterior and lateral walls of middle ear at the level of the tympanic sulcus. The variations observed were based on its entry at either three levels 1) Iter chordae posterius (35 cases) 2) Inferior toiter chordae posterious (63 cases) 3) Lateral to the tympanic sulcus (2 cases). Conclusion: Variations in the middle ear course of chorda tympani nerve were commonly seen in our case series. The most common variation being its entry into the middle ear inferior to the iter chordae posterious at the level of tympanic sulcus and the least common being its entry lateral to the tympanic sulcus.Understanding the middle ear anatomical variations in the course of chorda tympani nerve is surgically significant in preventing post-operative taste and salivary morbidity following middle ear surgeries. The present study highlights the varied course of the chorda tympani nerve in the middle ear and minor anatomical variations are not very rare.
Authors and Affiliations
Abdul Aman Rahman, Raja Premnath, Subramanian Kulasekaran
Keywords
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