A 86-year-old lady presented with sudden onset of appendicular ataxia of the right arm with minimal weakness and no deep sensory loss. On neurological exam, she had minimal pronator drift. She had undershooting and overshooting on attempting to reach the target finger on finger to nose test. She also has dysdiadokokinesia and uncontrolled rebound. The tests were not worsened with eyes closed. The sensory exam was unremarkable including normal proprioception. Her brain MRI showed an area of acute infarct in left posterior parietal lobe (Fig. 1) and no other lesion. Although parietal ataxia is generally considered to result from loss of proprioceptive feedback inputs to the motor function [
], but our patient showed clinical features of classic cerebellar kinetic ataxia without loss of proprioception. Brain MRI showed involvement of superior and part of inferior parietal lobules with preserving paracentral lobule which is presumably responsible for sensory innervation of contralateral limbs.
- Ghika J.
- Bogousslavsky J.
- Uske A.
- Regli F.
Parietal kinetic ataxia without proprioceptive deficit.
J Neurol Neurosurg Psychiatry. 1995; 59: 531-533
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- Parietal kinetic ataxia without proprioceptive deficit.J Neurol Neurosurg Psychiatry. 1995; 59: 531-533
- An anatomical investigation of the corticopontaine projection in the primate (Macaca fascicularis and Saimiri sciureus)—II. The projection from frontal and parental association areas.Neuroscience. 1979; 4: 747-765
Published online: March 18, 2015
Accepted: March 10, 2015
Received: March 3, 2015
© 2015 Elsevier B.V. Published by Elsevier Inc. All rights reserved.