A foveal target increases catch-up saccade frequency during smooth pursuit 1 2 Stephen J. Heinen, Elena Potapchuk, Scott N. J. Watamaniuk 3 4 Smith-Kettlewell Eye Research Institute, San Francisco, CA, 94115, USA 5 Department of Psychology, Wright State University, Dayton, OH, 05435, USA 6 7 Running head: Foveal pursuit targets increase catch-up saccade frequency 8 9 Corresponding author: Steph...

A one dimensional model of primate smooth pursuit mechanism has been implemented in 2 11m CMOS VLSI. The model consolidates Robinson's negative feedback model with Wyatt and Pola's positive feedback scheme, to produce a smooth pursuit system which zero's the velocity of a target on the retina. Furthermore, the system uses the current eye motion as a predictor for future target motion. Analysis,...

In this study, we address the question of whether a target is foveated during smooth pursuit. Specifically, we examine whether smooth pursuit eye movements land near the center-of-mass of the target, as is the case for saccades. To that end, we instructed eight untrained, healthy participants to follow moving targets, presented monocularly in a scanning laser ophthalmoscope. Stimuli moved eithe...

Eye movements alter visual perceptions in a number of ways. During smooth-pursuit eye movements, previous studies reported decreased detection threshold for colored stimuli and for high-spatial-frequency luminance stimuli, suggesting a boost in the parvocellular system. The present study investigated the underlying neural mechanism using EEG in human participants. Participants followed a moving...

Humans track smoothly moving objects with a combination of saccadic and smooth pursuit eye movements, called dual mode tracking. A pseudo random ternary sequence was used to generate an unpredictable target motion that had linear ramps of random velocity and duration. This aperiodic waveform eliminated the subject's ability to predict target motion. Saccades were removed from these records leav...

When moving through our environment, it is vital to preferentially process positions on our future path in order to react quickly to critical situations. During smooth pursuit, attention may be directed ahead with either a focused locus or a broad bias. We examined the 2D spatial extent of attention during a smooth pursuit task using both saccade (SRT) and manual (MRT) reaction times as measure...

When our eyes track objects that are moving in a richly structured environment, the retinal image of the stationary visual scene inevitably moves over the retina in a direction opposite to the eye movement. Such self-motion-induced global retinal slip usually provides an ideal stimulus for the optokinetic reflex. This reflex operates to compensate for global image flow. However, during smooth p...

A one dimensional model of primate smooth pursuit mechanism has been implemented in 2 μm CMOS VLSI. The scheme consolidates Robinson’s negative feedback model with Wyatt and Pola’s positive feedback scheme, to produce a smooth pursuit system which zeroes the velocity of a target on the retina. Furthermore, the system uses the current eye motion as a predictor for future target motion. Analysis,...

SUMMARY It has been reported that not only the information related to retinal slip but also the non-visual information were population-coded in the middle temporal (MT) area and the medial superior temporal (MST) area during smooth pursuit eye movements. On the other hand, it has been also reported that the information related to motor signals to generate eye movements were firing rate-coded in...

Neuregulin-1 (NRG1) variations have been shown to modulate schizophrenia candidate endophenotypes related to brain structure and function. The aim of this study was to determine the effect of NRG1 on several oculomotor schizophrenia endophenotypes. The effects of 5 core single-nucleotide polymorphisms (SNPs) within the NRG1 gene to oculomotor parameters in a battery of oculomotor tasks (saccade...