title: Unidirectional abnormal eye movement without gaze nystagmus - Report of a case.
abstract: We report here a case with unidirectional abnormalities of smooth eye movements without gaze nystagmus. Abnormalities of eye movements were confined to unidirectional (leftward) horizontal pursuit and slow phase of OKN; however, horizontal VOR (slow phase of caloric nystagmus) and saccade were normal, and vertical eye movements were also normal. No lesions were detected in the central nervous system, and any history of drug intake was denied. Although the cause of the unidirectional abnormality in eye movement of this case is still not clear, a congenital origin seems to be the most probable.
authors.affiliation: Division of Neuro-Otology, Department of Otolaryngology, Saitama Medical University, Hongo 38, Moroyama-machi, Saitama 350-0495, Japan. Electronic address: mamizuno@saitama-med.ac.jp.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Mizuno
authors.affiliation: Division of Neuro-Otology, Department of Otolaryngology, Saitama Medical University, Hongo 38, Moroyama-machi, Saitama 350-0495, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Shibasaki
authors.affiliation: Division of Neuro-Otology, Department of Otolaryngology, Saitama Medical University, Hongo 38, Moroyama-machi, Saitama 350-0495, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Shindo
authors.affiliation: Division of Neuro-Otology, Department of Otolaryngology, Saitama Medical University, Hongo 38, Moroyama-machi, Saitama 350-0495, Japan.
authors.forename: Akinori
authors.initials: A
authors.lastname: Ito
authors.affiliation: Division of Neuro-Otology, Department of Otolaryngology, Saitama Medical University, Hongo 38, Moroyama-machi, Saitama 350-0495, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kase
mesh_terms: D000328:Adult; D004584:Electronystagmography; D006801:Humans; D008297:Male; D009760:Nystagmus, Physiologic / Q000502:physiology; D015835:Ocular Motility Disorders / Q000151:congenital / Q000503:physiopathology*; D011698:Pursuit, Smooth; D012438:Saccades / Q000502:physiology
keywords: Abnormal eye movement; Congenital; Horizontal; Unidirectional