1. Zhang Zhenxin, Roman G C, Hong Zhen, et al. Parkinson's disease in China: prevalence in Beijing, Xian, and Shanghai. Lancet, 2005, 365(9459): 595-597.
5. Deuschl G, Schade-Brittinger C, Krack P, et al. A randomized trial of deep-brain stimulation for Parkinson's disease. N Engl J Med, 2006, 355(9): 896-908.
[6]
6. Goetz C G, Tilley B C, Shaftman S R, et al. Movement disorder Society-Sponsored revision of the unified Parkinson's disease rating scale (MDS-UPDRS): scale presentation and clinimetric testing results. Movement Disorders, 2008, 23(15): 2129-2170.
10. Giuffrida J P, Riley D E, Maddux B N, et al. Clinically deployable Kinesia technology for automated tremor assessment. Mov Disord, 2009, 24(5): 723-730.
[11]
11. Heldman D A, Giuffrida J P, Chen R, et al. The modified bradykinesia rating scale for Parkinson's disease: reliability and comparison with kinematic measures. Mov Disord, 2011, 26(10): 1859-1863.
[12]
12. Cole B T, Roy S H, de Luca C J, et al. Dynamical learning and tracking of tremor and dyskinesia from wearable sensors. IEEE Trans Neural Syst Rehabil Eng, 2014, 22(5): 982-991.
[13]
13. Martinez-Manzanera O, Roosma E, Beudel M, et al. A method for automatic and objective scoring of bradykinesia using orientation sensors and classification algorithms. IEEE Trans Biomed Eng, 2016, 63(5): 1016-1024.
[14]
14. Maetzler W, Domingos J, Srulijes K, et al. Quantitative wearable sensors for objective assessment of Parkinson's disease. Mov Disord, 2013, 28(12): 1628-1637.
[15]
15. Sepehri B, Esteki A, Ebrahimi-Takamjani E, et al. Quantification of rigidity in Parkinson's disease. Ann Biomed Eng, 2007, 35(12): 2196-2203.
[16]
16. Endo T, Okuno R, Yokoe M, et al. A novel method for systematic analysis of rigidity in Parkinson's disease. Mov Disord, 2009, 24(15): 2218-2224.
[17]
17. Xia Ruiping, Sun Junfeng, Threlkeld A J. Analysis of interactive effect of stretch reflex and shortening reaction on rigidity in Parkinson's disease. Clin Neurophysiol, 2009, 120(7): 1400-1407.
[18]
18. Patrick S K, Denington A A, Gauthier M J, et al. Quantification of the UPDRS rigidity scale. IEEE Trans Neural Syst Rehabil Eng, 2001, 9(1): 31-41.
25. Park B K, Kwon Y, Kim J W, et al. Analysis of viscoelastic properties of wrist joint for quantification of parkinsonian rigidity. IEEE Trans Neural Syst Rehabil Eng, 2011, 19(2): 167-176.
20. Fong W T, Ong S K, Nee A . Methods for in-field user calibration of an inertial measurement unit without external equipment. Measurement Science and Technology, 2008, 19(8): 817-822.