Torsional nystagmus: quantitative features and possible pathogenesis.
We measured eye rotations in three planes in a patient with acquired, torsional nystagmus. This nystagmus had linear or increasing-velocity waveforms, was increased after active pitch rotations of the head, and was suppressed by convergence. Magnetic resonance imaging demonstrated a midpontine lesion that was probably a venous angioma. We postulate that torsional nystagmus in this patient was due to disruption of central vestibular connections.
Noseworthy
J H
JH
Department of Clinical Neurological Sciences, University of Western Ontario, London, Canada.
Ebers
G C
GC
Leigh
R J
RJ
Dell'Osso
L F
LF
D000328:Adult; D001927:Brain Diseases / Q000150:complications; D006801:Humans; D008297:Male; D009759:Nystagmus, Pathologic / Q000209:etiology / Q000503:physiopathology*; D011149:Pons; D014102:Torsion Abnormality