Somatosensory temporal discrimination in essential tremor and isolated head and voice tremors

Antonella Conte, Gina Ferrazzano, Nicoletta Manzo, Giorgio Leodori, Giovanni Fabbrini, Alfonso Fasano, Michele Tinazzi, Alfredo Berardelli

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this study was to investigate the somatosensory temporal discrimination threshold in patients with essential tremor (sporadic and familial) and to evaluate whether somatosensory temporal discrimination threshold values differ depending on the body parts involved by tremor. We also investigated the somatosensory temporal discrimination in patients with isolated voice tremor. We enrolled 61 patients with tremor: 48 patients with essential tremor (31 patients with upper limb tremor alone, nine patients with head tremor alone, and eight patients with upper limb plus head tremor; 22 patients with familial vs. 26 sporadic essential tremor), 13 patients with isolated voice tremor, and 45 healthy subjects. Somatosensory temporal discrimination threshold values were normal in patients with familial essential tremor, whereas they were higher in patients with sporadic essential tremor. When we classified patients according to tremor distribution, somatosensory temporal discrimination threshold values were normal in patients with upper limb tremor and abnormal only in patients with isolated head tremor. Temporal discrimination threshold values were also abnormal in patients with isolated voice tremor. Somatosensory temporal discrimination processing is normal in patients with familial as well as in patients with sporadic essential tremor involving the upper limbs. By contrast, somatosensory temporal discrimination is altered in patients with isolated head tremor and voice tremor. This study with somatosensory temporal discrimination suggests that isolated head and voice tremors might possibly be considered as separate clinical entities from essential tremor.

Original languageEnglish
Pages (from-to)822-827
Number of pages6
JournalMovement Disorders
Volume30
Issue number6
DOIs
Publication statusPublished - May 1 2015

Keywords

  • Essential tremor
  • Isolated tremor
  • Somatosensory temporal discrimination

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

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