Ultrasonography and electrophysiological study of median nerve in patients with essential tremor

Hye Lim Lee, Ji Sun Kim, Hanjun Kim, Il Soo Kim, Jae Whan Kim, Ye Eun Kim, Seong Beom Koh

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    1 Citation (Scopus)


    Essential tremor (ET) is a common movement disorder characterized by postural or kinetic tremor. We aimed to evaluate median nerve enlargement in patients with ET using ultrasonography (USG). Thirty-eight hands from 19 patients with ET and 24 hands from 13 controls underwent nerve conduction studies (NCS) and USG at the wrist. Tremor severity was measured using the Fahn–Tolosa–Marin Tremor Rating Scale (FTM-TRS). The median nerve cross sectional area (mCSA) in USG and NCS parameters were compared using ANCOVA. We evaluated the correlation between mCSA and NCS parameters or FTM-TRS scores using linear regression analysis. mCSA was significantly larger (p<0.001) and NCS parameters were different in two groups. Also, mCSA was negatively correlated with part B and C scores of FTM-TRS (p<0.001 and p = 0.039, respectively). In conclusion, median nerve enlargement with the changes of NCS parameters was observed and correlated with the severity of tremor in patients with ET.

    Original languageEnglish
    Article numbere0215750
    JournalPloS one
    Issue number4
    Publication statusPublished - 2019 Apr

    Bibliographical note

    Publisher Copyright:
    © 2019 Lee et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

    ASJC Scopus subject areas

    • General


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