During natural viewing, the eye samples the visual environment using a series of jerking, saccadic eye movements, separated by periods of fixation. This raises the fundamental question of how information from separate fixations is integrated into a single, coherent percept. We discuss two mechanisms that may be involved in generating our stable and continuous perception of the world. First, information about attended objects may be integrated across separate glances. To evaluate this possibility, we present and discuss data showing the transsaccadic temporal integration of motion and form. We also discuss the potential role of the re-mapping of receptive fields around the time of saccades in transsaccadic integration and in the phenomenon of saccadic mislocalization. Second, information about multiple objects in a natural scene is built up across separate glances into a coherent representation of the environment. Experiments with naturalistic stimuli show that scene memory builds up across separate glances in working memory. The combination of saccadic re-mapping, occurring on a timescale of milliseconds, and a medium-term scene memory, operating over a span of several minutes, may underlie the subjective impression of a stable visual world.
Transsaccadic memory: Building a stable world from glance to glance
MORRONE, MARIA CONCETTA
2007-01-01
Abstract
During natural viewing, the eye samples the visual environment using a series of jerking, saccadic eye movements, separated by periods of fixation. This raises the fundamental question of how information from separate fixations is integrated into a single, coherent percept. We discuss two mechanisms that may be involved in generating our stable and continuous perception of the world. First, information about attended objects may be integrated across separate glances. To evaluate this possibility, we present and discuss data showing the transsaccadic temporal integration of motion and form. We also discuss the potential role of the re-mapping of receptive fields around the time of saccades in transsaccadic integration and in the phenomenon of saccadic mislocalization. Second, information about multiple objects in a natural scene is built up across separate glances into a coherent representation of the environment. Experiments with naturalistic stimuli show that scene memory builds up across separate glances in working memory. The combination of saccadic re-mapping, occurring on a timescale of milliseconds, and a medium-term scene memory, operating over a span of several minutes, may underlie the subjective impression of a stable visual world.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
