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Palatal tremor suppressed by mouth opening

Clinical and neurophysiological correlations in two patients

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Abstract

We report clinical and neurophysiological findings in two patients with palatal tremor (PT). In both patients a prompt and persistent suppression of palatal movements and clicking sounds is caused by slight passive or active mouth opening. One patient has a typical essential palatal tremor (EPT) according to current classification criteria. The other one has a PT characterized by involuntary activation of levator veli palatini and genioglossus muscles. Objective clicking sounds were observed late during the course of the disease. A symptomatic aetiology was excluded, suggesting a diagnosis of atypical EPT.

Our observations further confirm that unusual features of some cases may not fit current PT classification criteria. These two cases have several features that distinguish them from voluntary PT and from psychogenic PT. We emphasize that clear cut modulating phenomena may be relevant features in both typical and atypical involuntary EPT. We finally focus on the significance of jaw posture in determining PT suppression in our patients.

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Authors and Affiliations

  1. Unità Operativa di Neurologia, Ospedale Santa Chiara, Piazzale Medaglie d’oro n° 1, 38100, Trento, Italy

    A. Morini MD, C. Boninsegna MD, M. Nostro & D. Orrico MD

  2. Department of Neurology, Borgo Trento Hospital, Verona, Italy

    G. Moretto MD & M. Tinazzi MD

  3. Department of Neurology, Galliera Hospital, Genova, Italy

    St. Simonetti MD

Authors
  1. A. Morini MD
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  2. C. Boninsegna MD
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  3. M. Nostro
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  4. St. Simonetti MD
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  5. D. Orrico MD
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  6. G. Moretto MD
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  7. M. Tinazzi MD
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Correspondence to A. Morini MD.

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Morini, A., Boninsegna, C., Nostro, M. et al. Palatal tremor suppressed by mouth opening. J Neurol 252, 1335–1340 (2005). https://doi.org/10.1007/s00415-005-0861-5

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  • DOI: https://doi.org/10.1007/s00415-005-0861-5

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