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Ocular Torsion and Tilt of Subjective Visual Vertical are Sensitive Brainstem Signs
Ann Neurol 33:292-299, Dieterich,M.&Brandt,T., 1993
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Article Abstract
Based on neuroimaging,we conclude that all unilateral brainstem lesions caudal to the upper pons cause ipsiversive OT of one or both eyes,with concurrent ipsiversive tilts of SVV adjustments;all lesions rostral to this pontine level cause contraversive tilts of OT and SVV.Evidence is presented that pathological tilts of OT and SVV are secondary to a dysfunction of the tonic bilateral vestibular inputs that stabilize the eyes and head in normal upright position in the roll plane and dominate our perception of verticality.
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