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The central basis of discrete sampling behavior in the human pupillary control system

Sun Fuchuan, Mi Weiqun, Fang Lieyi

Shanghai Institute of Physiology, Chinese Academy of Sciences. Shanghai 200031

Abstract

The human pupillary control system was investigated with double-pulse light dichoptic stimulation to explore its discrete sampling behavior. In this dichoptic stimulating method, the first pulse of the double pulse light stimulated one eye, of which the pupil area was recorded, and the second pulse stimulated the other eye (the contralateral eye). The experiment data demonstrated that the pupillary control system requires a minimum time interval, approximately 0.6s, to elicit next transient response to the second light pulse, even though the two pulses were presented respectively to different eyes of the subject.

Key words: Pupil;Pupillary response;Dichoptic stimulating;Discrete sampling control; Biological control

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Citing This Article：

Sun Fuchuan, Mi Weiqun, Fang Lieyi. The central basis of discrete sampling behavior in the human pupillary control system. Acta Physiol Sin 1995; 47 (5): (in Chinese with English abstract).