Pupillary and cardiovascular responses to a video movie in senior human subjects
Pupillary and cardiovascular responses to a video movie in senior human subjects
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DOI：
10.1016/s1566-0702(02)00047-4
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发表时间：
2002-05-31
影响因子：
2.7
通讯作者：
Bando, T
中科院分区：
文献类型：
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作者：
Ando, T;Tanaka, A;Bando, T
通过测量10名老年人瞳孔和心血管参数的变化，评估了观看视频电影对自主神经功能的影响。受试者观看了一系列在机动车辆执行过程中拍摄的视频图像（伴有声音）。将图像在大屏幕上背投15 min。在视频演示之前和之后，通过红外瞳孔仪测量瞳孔直径和光反射参数。连续测量他们的心电图（ECG）和血压。根据血压和空腹血糖水平将受试者分为两组。A组受试者的血压低于140 mm Hg，空腹血糖水平低于7 mmol/dl（正常组）。其他受试者被纳入B组（轻度高血压或糖尿病组）。虽然A组成员观看视频后瞳孔对光反射的变化很小，但B组成员的瞳孔反射幅度在很宽的范围内变化。通过对心血管节律的频谱分析，血压节律的%LF和%HF分量在观看视频前两组之间有显著性差异。然而，两组之间的视频观看前后的频率分量的比率没有显著差异。我们的研究结果表明，瞳孔对光反射不太精确的控制在受试者轻度自主神经功能障碍后，长期的视听刺激。(C)出版社：Elsevier Science B. V.
The effects of watching video movies on autonomic functions were estimated by measuring changes in pupillary and cardiovascular parameters in 10 senior subjects. The subjects looked at a series of video images (with accompanied sounds) taken during the execution of motor vehicles. The images were rear-projected on a large screen for 15 min. Pupil diameter and parameters of the light reflex were measured by an infrared pupillometer before and after the video presentation. Their electrocardiograms (ECG) and blood pressure were measured continuously. Subjects were divided into two groups depending on their values of blood pressure and fasting plasma glucose level. Subjects in Group A had blood-pressures of less than 140 mm Hg and a fasting plasma glucose level of less than 7 mmol/dl (normal group). Other subjects were included in Group B (mild hypertension or diabetes mellitus group). While changes in pupillary light reflex after video viewing were minimal in the members of Group A, amplitudes of the pupillary reflex in the members of Group B varied over a significantly wide range. By the spectral analysis of cardiovascular rhythm, %LF and %HF components of blood pressure rhythm were significantly different between the two groups before video viewing. However, the ratios of frequency components before and after video viewing were not significantly different between the two groups. Our findings suggest that pupillary light reflex was less precisely controlled in subjects with mild autonomic dysfunction after prolonged audiovisual stimulation. (C) 2002 Published by Elsevier Science B.V.