Dynamic pupillary response controlled by the pupil size effect

摘要: Pupillary escape has been described as an initial contraction followed by a slow redilatation, occurring in response to step stimulus of low-intensity light. When the pupil size is small, same pupillary capture, steady and sustained contraction. In this experiment comparison was made between three modes controlling thereby regulating response: contralateral light background level, ipsilateral accommodative level with which there no change retinal adaptation. All setting showed similar results illustrating effect. addition, inhibitory effect found both backgrounds that independent Weber's Law case. Our lead formulation binocular model, featuring internal parameter control whereby signal dependent on static regulates gains parallel phasic tonic pathways, former responsive transient changes light, latter levels levels. findings also raise interesting questions concerning loci these complex interactions simple neuroanatomy pathways.