VERTICAL GAZE AND CONVERGENCE PALSIES WITH UNILATERAL MIDBRAIN LESION
FUMIHITO YOSHII *
Department of Neurology, Saiseikai Hiratsuka Hospital, 37-1 Tateno-cho, Hiratsuka 254-0046, Japan and Department of Neurology, Tokai University Oiso Hospital, 21-1 Gakkyou, Oiso, Naka-gun, 259-0198, Japan
NAOKO OGURA
Department of Neurology, Saiseikai Hiratsuka Hospital, 37-1 Tateno-cho, Hiratsuka 254-0046, Japan
YOSUKE KASAI
Department of Neurology, Saiseikai Hiratsuka Hospital, 37-1 Tateno-cho, Hiratsuka 254-0046, Japan
MASAFUCHI RYO
Department of Neurology, Tokai University Oiso Hospital, 21-1 Gakkyou, Oiso, Naka-gun, 259-0198, Japan
WAKOH TAKAHASHI
Department of Neurology, Tokai University Oiso Hospital, 21-1 Gakkyou, Oiso, Naka-gun, 259-0198, Japan
*Author to whom correspondence should be addressed.
Abstract
We report a patient with a small unilateral midbrain lesion who showed both vertical gaze and convergence palsies. We speculate that the small lesion located near the rostral interstitial nucleus of the medial longitudinal fasciculus (riMLF) and the interstitial nucleus of Cajal (INC) is responsible for these ocular palsies. Our observations suggest that convergence neurons are located in the vicinity of the riMLF/INC.
Keywords: Vertical gaze palsy, convergence palsy, skew deviation, rostral interstitial nucleus of medial longitudinal fasciculus (riMLF), interstitial nucleus of Cajal