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Findings by magnetic resonance imaging of rectus muscle pulleys in normal persons Reika Kono 1 , Hirotaka Okanobu 1 , Hiroshi Ohtsuki 1 , Takashi Furuse 1 1Dept of Ophthalmol,Okayama Univ Grad Sch of Med,Dentistry and Pharmaceutical Sci pp.1537-1541
Published Date 2009/9/15
DOI https://doi.org/10.11477/mf.1410102880
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Abstract. Purpose:To report the location of pulleys of rectus muscles in normal persons using magnetic resonance imaging(MRI). Cases and Method:This study was made on 20 eyes of 13 healthy volunteers. The age ranged from 21 to 59 yeas,average 30 years. Location of pulleys was calculated on the MRI coronal section of the orbit. Point zero was defined as 9 mm posterior to the equator. Results:Pulley of medial rectus averaged -13.45±0.71 mm horizontally and -1.66±0.72 mm vertically,that of lateral rectus 9.71±0.72 mm and -2.58±1.02 mm respectively,that of superior rectus -1.62±0.99 mm and 10.15±0.54 mm,and that of inferior rectus -4.85±0.91 and -12.79±0.96 mm. Conclusion:Location of pulleys of rectus muscles shows small interindividual differences and good stability in horizontal and vertical planes.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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