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H. Osanai, M. Ohba, K.–I. Ogawa, A. Sugawara, A. Tochigi, K. Ohtsuka; The Relationship Between Up–/Downshoots and the Absence of Abuducens Nerve in Duane’s Retraction Syndrome . Invest. Ophthalmol. Vis. Sci. 2005;46(13):2947.
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Purpose: To verify the relationship between up–/downshoots and the absence of the abducens nerve using a magnetic resonance imaging in Duane’s retraction syndrome (DRS). Methods: A total of 15 subjects who underwent MRI scans were enrolled. The presence or absence of the abducens nerve was assessed by first imaging employing steady state acquisition (FIESTA) to obtain high–resolution sequential images through the abducens nerve in the subarachinoid segment in the axial plane from the medulla to the midbrain. Results: The abducens nerve on the affected side could not be described in seven of 15 eyes in DRS. Moreover, up–/downshoots with retraction of the glove on attempted adduction was accepted in six of the these seven examples. The abducens nerve on the affected side were described in eight of 15 eyes and up–/downshoots was not accepted in six of the these eight examples. Conclusions: The result suggested that the defect of abducens nerve was an etiologic factor in up–/downshoots of DRS.
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