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From the Department of Neurology (Drs. Thömke, Marx, Urban, Dieterich, and Hopf) and the Institute of Neuroradiology (Dr. Stoeter), University of Mainz, Germany; Department of Neurological Sciences (Drs. Iannetti and Cruccu), Università degli Studi di Roma "La Sapienza," Rome, Italy; and Department of Neurology (Dr. Fitzek), University of Jena, Germany.
Address correspondence and reprint requests to Dr. Frank Thömke, Department of Neurology, University of Mainz, Langenbeckstr. 1, D-55101 Mainz, Germany; e-mail: thoemke{at}neurologie.klinik.uni-mainz.de
Body lateropulsion may occur without signs of vestibular dysfunction and vestibular nucleus involvement. The authors examined 10 such patients with three-dimensional brainstem mapping. Body lateropulsion without limb ataxia reflected an impairment of vestibulospinal postural control caused by a lesion of the descending lateral vestibulospinal tract, whereas body lateropulsion with limb ataxia was probably the consequence of impaired or absent proprioceptive information caused by a lesion of the ascending dorsal spino-cerebellar tract.
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