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September 23, 2008; 71 (13) Resident and Fellow Section

Teaching NeuroImage: Posttraumatic palatal tremor

Pranshu Sharma, Muneer Eesa, Alexandre Y. Poppe, Mayank Goyal
First published September 22, 2008, DOI: https://doi.org/10.1212/01.wnl.0000326578.18675.3a
Pranshu Sharma
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Muneer Eesa
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Alexandre Y. Poppe
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Mayank Goyal
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Teaching NeuroImage: Posttraumatic palatal tremor
Pranshu Sharma, Muneer Eesa, Alexandre Y. Poppe, Mayank Goyal
Neurology Sep 2008, 71 (13) e30; DOI: 10.1212/01.wnl.0000326578.18675.3a

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A 56-year-old man with head injury, loss of consciousness, and normal head CT 6 weeks prior presented with persistent headache. No neurologic deficit was elicited on examination except for involuntary rhythmic movements of the soft palate, from which he was asymptomatic (video on the Neurology® Web site at www.neurology.org). In particular, he did not complain of ear clicks, and no treatment was offered. MRI showed foci of remote diffuse axonal injury including the left superior cerebellar peduncle (figure, A). The right inferior olivary nucleus was enlarged and hyperintense on T2-weighted images (figure, B).

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Figure T2-weighted axial MRIs showing left superior cerebellar peduncle atrophy due to remote diffuse axonal injury (A, arrow) resulting in enlargement and increased signal intensity of the right inferior olivary nucleus suggesting hypertrophic olivary degeneration (B)

Symptomatic palatal tremor occurs due to transsynaptic hypertrophic degeneration of the inferior olivary nucleus secondary to lesions involving the contralateral dentate nucleus, superior cerebellar peduncle, or ipsilateral central tegmental tract within the brainstem (Guillain-Mollaret triangle).1

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    Disclosure: The authors report no disclosures.

  • Series editor: Mitchell S.V. Elkind MD, MS, Section Editor

REFERENCE

  1. 1.↵
    Goyal M, Versnick E, Tuite P, et al. Hypertrophic olivary degeneration: metaanalysis of the temporal evolution of MR findings. Am J Neuroradiol 2000;21:1073–1077.
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