Speed discrimination of distal stimuli during smooth pursuit eye motion

Vision Research
K Turano, S M Heidenreich

Abstract

We evaluated the hypothesis that smooth pursuit eye movements affect speed discrimination thresholds of distal stimuli because they alter the retinal image speed. Subjects judged speed differences of sine-wave gratings while they simultaneously pursued a superimposed moving bar. Speed discrimination thresholds were measured, under conditions of controlled eye movements, for grating speeds of 0.5 and 2.0 deg/sec across a range of eye velocities. Thresholds were stimulated using a Monte Carlo method based on the retinal speed hypothesis, and the simulation predictions were compared to the psychophysically determined thresholds. The simulation results provided a good match to the psychophysical data for conditions where the eye moved at a slower speed than the grating, regardless of whether the eye moved in the same or opposite direction. However, when the eye moved at a faster speed than the grating in the same direction, the psychophysical thresholds were significantly higher than predicted by the simulation. Control experiments and analyses rule out explanations based on relative motion cues, saccadic involvement, and attentional demands.

References

Jan 1, 1989·Vision Research·S P McKee, L Welch
Jan 1, 1987·Vision Research·B Khurana, E Kowler
Jan 1, 1984·Vision Research·G A OrbanH Maes
Jan 1, 1981·Vision Research·S P McKee
Aug 1, 1981·Acta Psychologica·A H Wertheim
Jan 1, 1994·Experimental Brain Research·E Brenner, A V van den Berg
Jan 1, 1994·Experimental Brain Research·T NiemannK P Hoffmann
Jun 1, 1996·Vision Research·S M Heidenreich, K A Turano
Feb 15, 1985·Applied Optics·H D Crane, C M Steele

❮ Previous
Next ❯

Citations

Sep 25, 2009·Journal of Neurophysiology·Leanne Chukoskie, J Anthony Movshon
Dec 24, 2014·Vision Research·Mehmet N AgaogluHaluk Öğmen
Feb 13, 2001·Vision Research·K A Turano, R W Massof
Jul 19, 2001·Vision Research·J A Beintema, A V van den Berg
May 27, 1999·Vision Research·K A Turano, S M Heidenreich
Oct 24, 2014·Frontiers in Psychology·Mark NawrotKeith Stroyan
Sep 12, 2015·IEEE Transactions on Visualization and Computer Graphics·Asmund BirkelandIvan Viola
Jul 9, 2017·Vision Research·Hinze HogendoornFrans A J Verstraten
Mar 14, 2008·Journal of Neurophysiology·Mario Ruiz-Ruiz, Julio C Martinez-Trujillo
Dec 4, 2021·Scientific Reports·Jennifer SudkampDavid Souto

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.