The vagus nerve becomes smaller in patients with Parkinson's disease: A preliminary cross-sectional study using ultrasonography. Author: Tsukita K1, Taguchi T2, Sakamaki-Tsukita H3, Tanaka K4, Suenaga T5 Affiliation: <sup>1</sup>Department of Neurology, Tenri Hospital, 200 Mishima-cho, Tenri, Nara, 632-8552, Japan. Electronic address: kazusan@kuhp.kyoto-u.ac.jp. <sup>2</sup>Department of Neurology, Tenri Hospital, 200 Mishima-cho, Tenri, Nara, 632-8552, Japan. Electronic address: skylark.diving@gmail.com. <sup>3</sup>Department of Neurology, Tenri Hospital, 200 Mishima-cho, Tenri, Nara, 632-8552, Japan. Electronic address: sakamakiharuhi@gmail.com. <sup>4</sup>Department of Neurology, Tenri Hospital, 200 Mishima-cho, Tenri, Nara, 632-8552, Japan. Electronic address: tanaka19830311kanta@gmail.com. <sup>5</sup>Department of Neurology, Tenri Hospital, 200 Mishima-cho, Tenri, Nara, 632-8552, Japan. Electronic address: suenaga@tenriyorozu.jp. Conference/Journal: Parkinsonism Relat Disord. Date published: 2018 Jun 4 Other: Pages: S1353-8020(18)30261-X , Special Notes: doi: 10.1016/j.parkreldis.2018.06.002. [Epub ahead of print] , Word Count: 14 KEYWORDS: Cross-sectional area (CSA); Parkinson's disease (PD); Ultrasonography; Vagus nerve PMID: 29887355 DOI: 10.1016/j.parkreldis.2018.06.002