Separable pupillary signatures of perception and action during perceptual multistability.

ABSTRACT: The pupil provides a rich, non-invasive measure of the neural bases of perception and cognition and has been of particular value in uncovering the role of arousal-linked neuromodulation, which alters both cortical processing and pupil size. But pupil size is subject to a multitude of influences, which complicates unique interpretation. We measured pupils of observers experiencing perceptual multistability-an ever-changing subjective percept in the face of unchanging but inconclusive sensory input. In separate conditions, the endogenously generated perceptual changes were either task-relevant or not, allowing a separation between perception-related and task-related pupil signals. Perceptual changes were marked by a complex pupil response that could be decomposed into two components: a dilat

SUBMITTER: Brascamp JW 

PROVIDER: S-EPMC8378849 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature