Wallenberg's syndrome: neurotological classification.
OBJECTIVE
Visually induced eye movements were investigated in 26 patients with Wallenberg's syndrome.


METHODS
Slow-phase optokinetic nystagmus (OKN) velocities, pursuit gains, and percentage fixation suppression (%FS) of caloric nystagmus were recorded by DC electrooculography (EOG), and stored directly onto FM magnetic tape.


RESULTS
OKN velocities, pursuit gains, and %FS decreased toward the lesion side (group A), whereas OKN velocities and pursuit gains decreased toward the side contralateral to the lesion side. %FS decreased toward the lesion side (group B). MR images in group A showed that lesions were only in and near to the vestibular nuclei, and images in group B showed that lesions extended to the cerebellum.


CONCLUSIONS
Visually guided eye movements allow classification of Wallenberg's syndrome into two types, one with brainstem lesions and one with both brainstem and cerebellar lesions. This demonstrates that assessing eye movements is helpful in supplementing MRI data.
Kato
Isao
I
Department of Otolaryngology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, 216-8511, Kawasaki, Japan.
Ogino
Sadao
S
Okada
Tomoyuki
T
Koizuka
Izumi
I
Kanayama
Ryoji
R
Nakamura
Tadashi
T
D000328:Adult; D000368:Aged; D001933:Brain Stem / Q000473:pathology / Q000503:physiopathology; D002150:Caloric Tests; D002531:Cerebellum / Q000473:pathology / Q000503:physiopathology; D002544:Cerebral Infarction / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology; D004292:Dominance, Cerebral / Q000502:physiology; D004584:Electronystagmography; D004585:Electrooculography; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D006801:Humans; D014854:Lateral Medullary Syndrome / Q000145:classification* / Q000175:diagnosis / Q000503:physiopathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011698:Pursuit, Smooth / Q000502:physiology; D014726:Vestibular Nuclei / Q000473:pathology / Q000503:physiopathology