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Spatial and temporal integration of visual motion signals for smooth pursuit eye movements in monkeys.

Publication ,  Journal Article
Osborne, LC; Lisberger, SG
Published in: J Neurophysiol
October 2009

To probe how the brain integrates visual motion signals to guide behavior, we analyzed the smooth pursuit eye movements evoked by target motion with a stochastic component. When each dot of a texture executed an independent random walk such that speed or direction varied across the spatial extent of the target, pursuit variance increased as a function of the variance of visual pattern motion. Noise in either target direction or speed increased the variance of both eye speed and direction, implying a common neural noise source for estimating target speed and direction. Spatial averaging was inefficient for targets with >20 dots. Together these data suggest that pursuit performance is limited by the properties of spatial averaging across a noisy population of sensory neurons rather than across the physical stimulus. When targets executed a spatially uniform random walk in time around a central direction of motion, an optimized linear filter that describes the transformation of target motion into eye motion accounted for approximately 50% of the variance in pursuit. Filters had widths of approximately 25 ms, much longer than the impulse response of the eye, and filter shape depended on both the range and correlation time of motion signals, suggesting that filters were products of sensory processing. By quantifying the effects of different levels of stimulus noise on pursuit, we have provided rigorous constraints for understanding sensory population decoding. We have shown how temporal and spatial integration of sensory signals converts noisy population responses into precise motor responses.

Duke Scholars

Published In

J Neurophysiol

DOI

EISSN

1522-1598

Publication Date

October 2009

Volume

102

Issue

4

Start / End Page

2013 / 2025

Location

United States

Related Subject Headings

  • Time Factors
  • Task Performance and Analysis
  • Stochastic Processes
  • Pursuit, Smooth
  • Psychophysics
  • Psychomotor Performance
  • Photic Stimulation
  • Neurology & Neurosurgery
  • Motion Perception
  • Male
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Osborne, L. C., & Lisberger, S. G. (2009). Spatial and temporal integration of visual motion signals for smooth pursuit eye movements in monkeys. J Neurophysiol, 102(4), 2013–2025. https://doi.org/10.1152/jn.00611.2009
Osborne, Leslie C., and Stephen G. Lisberger. “Spatial and temporal integration of visual motion signals for smooth pursuit eye movements in monkeys.J Neurophysiol 102, no. 4 (October 2009): 2013–25. https://doi.org/10.1152/jn.00611.2009.
Osborne LC, Lisberger SG. Spatial and temporal integration of visual motion signals for smooth pursuit eye movements in monkeys. J Neurophysiol. 2009 Oct;102(4):2013–25.
Osborne, Leslie C., and Stephen G. Lisberger. “Spatial and temporal integration of visual motion signals for smooth pursuit eye movements in monkeys.J Neurophysiol, vol. 102, no. 4, Oct. 2009, pp. 2013–25. Pubmed, doi:10.1152/jn.00611.2009.
Osborne LC, Lisberger SG. Spatial and temporal integration of visual motion signals for smooth pursuit eye movements in monkeys. J Neurophysiol. 2009 Oct;102(4):2013–2025.

Published In

J Neurophysiol

DOI

EISSN

1522-1598

Publication Date

October 2009

Volume

102

Issue

4

Start / End Page

2013 / 2025

Location

United States

Related Subject Headings

  • Time Factors
  • Task Performance and Analysis
  • Stochastic Processes
  • Pursuit, Smooth
  • Psychophysics
  • Psychomotor Performance
  • Photic Stimulation
  • Neurology & Neurosurgery
  • Motion Perception
  • Male