caa a22 4500 465794912 CHVBK 20180323112035.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF00140496 doi (NATIONALLICENCE)springer-10.1007/BF00140496 Model parameters of the smooth pursuit eye movement system with electrooculogram [Elektronische Daten] [Minzhong Yu, Lezheng Wu, Dezheng Wu] The visual pursuit test is a method that collects and analyzes the characteristics of pursuit eye movements and examines the function of the eye movement system. This paper analyzes the model parameters of the smooth pursuit eye movement system in order to explore a method for improving the analysis. The input-output relationship of the smooth pursuit system can be expressed by a quasilinear model. We compute the model parameters (gain, phase, spectral purity, cross covariance) by digital signal processing. Eye movement is recorded by electrooculogram. Both eyes are tested individually. The visual target moves at frequencies of 0.2, 0.4, 0.8, 1.2, and 1.6 Hz. Ranges are gain, 1.01 to 0.70; phase, -0.1 ° to -66 °; spectral purity, 0.97 to 0.70; and cross covariance, 0.99 to 0.26. We tested 40 normal subjects as well as patients with ataxia (8), vertigo (18), and ophthalmoplegia (9). The oculomotor system of normal subjects functions as a linear system in the performance of this test at 0.2 to 0.8 Hz. The spectral purity dropped to about 0.70 at 1.6 Hz. The variability of all measures increases greatly at 1.6 Hz, which indicates that this target motion exceeds the tracking ability of many normal subjects and that the oculomotor system of normal subjects functions as a nonlinear system in this condition. Statistical tests show no significant differences between sex, age, and the two eyes. The model parameters tentatively proved effective in clinical application. Kluwer Academic Publishers, 1990 Smooth visual pursuit nationallicence model parameter nationallicence electrooculogram nationallicence eye movement nationallicence Yu Minzhong Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, 54 Xianlie Road S., 510060, Guangzhou, P.R. China aut Wu Lezheng Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, 54 Xianlie Road S., 510060, Guangzhou, P.R. China aut Wu Dezheng Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, 54 Xianlie Road S., 510060, Guangzhou, P.R. China aut Documenta Ophthalmologica Kluwer Academic Publishers 76/1(1990-11-01), 37-46 0012-4486 76:1<37 1990 76 10633 https://doi.org/10.1007/BF00140496 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00140496 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yu Minzhong Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, 54 Xianlie Road S., 510060, Guangzhou, P.R. China aut NATIONALLICENCE 700 1- Wu Lezheng Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, 54 Xianlie Road S., 510060, Guangzhou, P.R. China aut NATIONALLICENCE 700 1- Wu Dezheng Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, 54 Xianlie Road S., 510060, Guangzhou, P.R. China aut NATIONALLICENCE 773 0- Documenta Ophthalmologica Kluwer Academic Publishers 76/1(1990-11-01), 37-46 0012-4486 76:1<37 1990 76 10633 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer