Journal of the Korean Balance Society  2006;5(2):281-284

A Rostro-Caudal Arrangement of the Oculomotor Fascicles Based on MR Findings of Midbrain Infarctions in Two Cases .

Jeong Ho PARK ; Won Hee CHUNG ; Tae Kyeong LEE ; Ki Bum SUNG

Keywords

Oculomotor nerve palsies; Magnetic resonance imaging

Country

Republic of Korea

Language

Korean

Abstract

A rostro-caudal topography of the oculomotor nerve fascicles is relatively well known in animal but not in human. We experienced two cases of midbrain infarctions presenting with isolated oculomotor nerve palsies. The MRI of the patient who had monocular elevation palsy with ptosis revealed a lesion in the middle to lower midbrain, whereas that of the other who had monocular depression and adduction palsy with pupillary mydriasis showed a discrete lesion in the upper to middle midbrain. We present the rostro-caudal arrangement of the oculomotor fascicles within midbrain based on MRI findings.