摘要
本文用实验方法从时域和频域上揭示了瞳孔对光反应的非线性特性.在亮度以正弦变化的光刺激下,瞳孔反应波形呈同步倍频现象;描述函数的频率-振幅特性曲线呈多峰的锯齿形;具有1.2Hz左右的系统固有频率和极限环现象.
The nonlinearity of pupillary responses to light was explored experimentally in human subjects in both the frequency and the time domains. The waveforms of the pupillary responses to the sinusoidal light stimuli appear to be of synchronized frequency multiplication. The gain vs frequency curve of the describing function is of sawtooth-like with multiple peaks. The pupillary control system possesses a nature frequency of about 1.2 Hz and shows limit cycling characteristics. The results reveal that the nonlinear control mechanism with an internal feedback loop exists in the pupillary control system.
出处
《生物物理学报》
CAS
CSCD
北大核心
1991年第3期384-390,共7页
Acta Biophysica Sinica
基金
国家自然科学基金
中国科学院生物物理所视觉信息处理开放实验室课题
