Author:

Keywords:

Science & Technology, Life Sciences & Biomedicine, Ophthalmology, SMOOTH EYE-MOVEMENT, CATCH-UP SACCADES, TRANSIENT DISAPPEARANCE, PRIOR EXPECTATIONS, LONG-TERM, PURSUIT, MOTION, PRIORS, INFORMATION, ADAPTATION, Adolescent, Adult, Bayes Theorem, Female, Humans, Male, Memory, Short-Term, Psychomotor Performance, Pursuit, Smooth, Reproducibility of Results, Saccades, Young Adult, 11 Medical and Health Sciences, 17 Psychology and Cognitive Sciences, Experimental Psychology, 3212 Ophthalmology and optometry

Abstract:

Oculomotor behaviors integrate sensory and prior information to overcome sensory-motor delays and noise. After much debate about this process, reliability-based integration has recently been proposed and several models of smooth pursuit now include recurrent Bayesian integration or Kalman filtering. However, there is a lack of behavioral evidence supporting these theoretical predictions. Here, we independently manipulated the reliability of visual and prior information in a smooth pursuit task. Our results show that both smooth pursuit eye velocity and catch-up saccade amplitude were modulated by visual and prior information reliability. We interpret these findings as the continuous reliability-based integration of a short-term memory of target motion with visual information, which support modelling work. Furthermore, we suggest that saccadic and pursuit systems share this short-term memory. We propose that this short-term memory of target motion is quickly built and continuously updated, and constitutes a general building-block present in all sensorimotor systems.