Seung Nam Yang1, Hyo Jeong Kang1, Joon Shik Yoon2, Sun Jae Won1, Woo-Keun Seo1, Seong Beom Koh2. 1. Department of Physical Medicine and Rehabilitation, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea (S.N.Y., H.J.K., J.S.Y.); Department of Physical Medicine and Rehabilitation, Yeouido St Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, Korea (S.J.W.); and Department of Neurology, Korea University College of Medicine, Seoul, Korea (W.-K.S., S.B.K.). 2. Department of Physical Medicine and Rehabilitation, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea (S.N.Y., H.J.K., J.S.Y.); Department of Physical Medicine and Rehabilitation, Yeouido St Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, Korea (S.J.W.); and Department of Neurology, Korea University College of Medicine, Seoul, Korea (W.-K.S., S.B.K.). parkinson@korea.ac.kr rehab46@korea.ac.kr.
Abstract
OBJECTIVES: Tremor is one of the cardinal features of Parkinson disease (PD) and may cause cumulative trauma-related injury to nerves of the hands. The aim of this study was to assess the electrodiagnostic and sonographic features of patients with PD and to assess the effect of tremor in PD on the median nerve. METHODS: We studied 31 hands of healthy control participants (n = 16; mean age ± SD, 60.25 ± 14.67 years) and 81 hands of patients with PD (n = 42; 64.95 ± 11.13 years). Motor symptoms were measured by the Unified Parkinson's Disease Rating Scale III. Median nerve conduction studies and sonographic cross-sectional area measurements were performed in all participants. RESULTS: The median nerve cross-sectional area in patients with PD (10.71 ± 2.79 mm(2)) was significantly larger than that in the control group (7.40 ± 1.05 mm(2); P < .05). However, there was no significant difference in median nerve electrodiagnostic findings between the PD and control groups. The median nerve cross-sectional area was associated with the severity of the tremor but not with the Unified Parkinson's Disease Rating Scale motor score. CONCLUSIONS: Tremor in PD is associated with median nerve enlargement but not with impairment of median nerve conduction.
OBJECTIVES:Tremor is one of the cardinal features of Parkinson disease (PD) and may cause cumulative trauma-related injury to nerves of the hands. The aim of this study was to assess the electrodiagnostic and sonographic features of patients with PD and to assess the effect of tremor in PD on the median nerve. METHODS: We studied 31 hands of healthy control participants (n = 16; mean age ± SD, 60.25 ± 14.67 years) and 81 hands of patients with PD (n = 42; 64.95 ± 11.13 years). Motor symptoms were measured by the Unified Parkinson's Disease Rating Scale III. Median nerve conduction studies and sonographic cross-sectional area measurements were performed in all participants. RESULTS: The median nerve cross-sectional area in patients with PD (10.71 ± 2.79 mm(2)) was significantly larger than that in the control group (7.40 ± 1.05 mm(2); P < .05). However, there was no significant difference in median nerve electrodiagnostic findings between the PD and control groups. The median nerve cross-sectional area was associated with the severity of the tremor but not with the Unified Parkinson's Disease Rating Scale motor score. CONCLUSIONS:Tremor in PD is associated with median nerve enlargement but not with impairment of median nerve conduction.