Changes in pupil diameter entrained by cortically initiated changes in attention.

@article{Daniels2012ChangesIP,
  title={Changes in pupil diameter entrained by cortically initiated changes in attention.},
  author={Lori B Daniels and David F. Nichols and Mathew S Seifert and Howard S. Hock},
  journal={Visual neuroscience},
  year={2012},
  volume={29 2},
  pages={131-42}
}
The diameter of the pupil is affected by changes in ambient illumination, color, spatial structure, movement, and mental effort. It has now been found that pupil diameter can be affected by cognitive processes. That is, it can be entrained by alternations between broadly spread and narrowly focused attention that are cued exogenously (attention is "summoned" by the cue) or endogenously (attention changes under the perceiver's intentional control). Pupil diameter also is affected by post-eye… CONTINUE READING