Document Detail

An anatomical study of the inferior oblique muscle with emphasis on its nerve entry.
MedLine Citation:
PMID:  21733359     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Anatomical studies regarding the inferior oblique muscle are scarce and the exact location of the entry of oculomotor nerve to the muscle has not been reported. In the present study, the objectives were to examine the exact location of the entry of oculomotor nerve to the inferior oblique muscle and to study the topographical anatomy of the muscle.
METHODS: The study included 56 intact orbits from 28 embalmed south Indian adult cadavers. The entire course of the nerve to the inferior oblique was exposed from both anterior and posterior aspects in all specimens. The exact location of the entry of nerve supplying the inferior oblique muscle was identified and the distances of the muscle from inferior and medial orbital margins were measured.
RESULTS: The oculomotor nerve entered the inferior oblique muscle through the orbital surface in 42 (75%) cases, through the ocular surface in 10 (17.9%) cases and 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 the cases. The distance of the muscle from the medial orbital margin was 11 mm in majority (42.8%) of the cases.
CONCLUSION: The present study reports that the oculomotor nerve most often enters the inferior oblique muscle through its orbital surface. Detailed knowledge of the topographical anatomy of inferior oblique muscle and its site of nerve entry are essential for surgeons when performing ophthalmological surgery and regional anesthesia.
Vishal Kumar; B V Murlimanju; P Devika; Narga Nair; Shakuntala R Pai; Thejodhar Pulakunta; N S Naveen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chang Gung medical journal     Volume:  34     ISSN:  2309-835X     ISO Abbreviation:  Chang Gung Med J     Publication Date:    2011 May-Jun
Date Detail:
Created Date:  2011-07-07     Completed Date:  2011-11-04     Revised Date:  2013-10-22    
Medline Journal Info:
Nlm Unique ID:  101088034     Medline TA:  Chang Gung Med J     Country:  China (Republic : 1949- )    
Other Details:
Languages:  eng     Pagination:  293-7     Citation Subset:  IM    
Department of Anatomy, KS Hegde Medical Academy, Nitte University, Mangalore, India.
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MeSH Terms
Oculomotor Muscles / anatomy & histology*,  surgery
Oculomotor Nerve / anatomy & histology*
Comment In:
Chang Gung Med J. 2011 Sep-Oct;34(5):548-9   [PMID:  22035901 ]

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