%0 Journal Article
%T An Anatomical Study of the Inferior Oblique Muscle with Emphasis on Its Nerve Entry
%A Vishal Kumar
%A B.V. Murlimanju
%A P. Devika
%A Narga Nair
%J Chang Gung Medical Journal
%D 2011
%I 
%X Background: Anatomical studies regarding the inferior oblique muscle are scarce and theexact location of the entry of oculomotor nerve to the muscle has not beenreported. In the present study, the objectives were to examine the exact location of the entry of oculomotor nerve to the inferior oblique muscle and tostudy the topographical anatomy of the muscle.Methods: The study included 56 intact orbits from 28 embalmed south Indian adultcadavers. The entire course of the nerve to the inferior oblique was exposedfrom both anterior and posterior aspects in all specimens. The exact locationof the entry of nerve supplying the inferior oblique muscle was identified andthe distances of the muscle from inferior and medial orbital margins weremeasured.Results: The oculomotor nerve entered the inferior oblique muscle through the orbitalsurface in 42 (75%) cases, through the ocular surface in 10 (17.9%) casesand through the posterior border in 4 (7.1%) cases. The distance of the muscle from the inferior orbital margin was 1 mm in majority (78.5%) of thecases. The distance of the muscle from the medial orbital margin was 11 mmin majority (42.8%) of the cases.Conclusion: The present study reports that the oculomotor nerve most often enters theinferior oblique muscle through its orbital surface. Detailed knowledge of thetopographical anatomy of inferior oblique muscle and its site of nerve entryare essential for surgeons when performing ophthalmological surgery andregional anesthesia.
%K oculomotor nerve
%K inferior oblique
%K orbit
%K muscle
%K anatomy
%U http://memo.cgu.edu.tw/cgmj/3403/340308.pdf