A Magnetic Resonance Imaging Study of the Upshoot-Downshoot Phenomenon of Duane's Retraction Syndrome
| Autor: | Jeffrey N. Bloom, E. Richard Graviss, Pierre G. Mardelli |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Adult
Male medicine.medical_specialty Eye Movements genetic structures medicine.diagnostic_test business.industry Eye movement Lateral rectus muscle Magnetic resonance imaging Anatomy Magnetic Resonance Imaging eye diseases Surgery Ophthalmology Duane Retraction Syndrome medicine.anatomical_structure Oculomotor Muscles Humans Medicine Female sense organs business Orbit (anatomy) |
| Zdroj: | American Journal of Ophthalmology. 111:548-554 |
| ISSN: | 0002-9394 |
| DOI: | 10.1016/s0002-9394(14)73696-7 |
| Popis: | Patients with Duane's retraction syndrome may have an associated upshoot or downshoot of the involved eye in adduction. This vertical movement has been attributed to the lateral rectus muscle slipping over or under the globe and acting as an elevator or depressor, respectively ("bridle-effect"). We used magnetic resonance imaging to investigate this phenomenon in two patients, one with an overshoot and the other with an undershoot. Minimal vertical displacement of the lateral rectus muscle in relation to the orbit was noted both on upshoot and downshoot. The bridle-effect theory must be modified to account for this finding. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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