Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Spatiotemporal impulse response and cortical magnification

V Manahilov1, S Atanassova

  • 1Institute of Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria. vvm@iph.bio.acad.bg

Vision Research
|July 17, 1998
PubMed
Summary

Visual processing models predict consistent cortical responses regardless of stimulation site. Experiments confirmed similar temporal responses and magnification-invariant cortical spatial responses, supporting peripheral vision theories.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Chlorsulfuron resistant transgenic tobacco as a tool for broomrape control.

Transgenic research·2005
Same author

Somatic cell count determination in cow's milk by near-infrared spectroscopy: a new diagnostic tool.

Journal of animal science·2001
Same author

Energy model for contrast detection: spatial-frequency and orientation selectivity in grating summation.

Vision research·2001
Same author

Matched filtering in motion detection and discrimination.

Proceedings. Biological sciences·2001
Same author

Spatial summation of peripheral Gabor patches.

Journal of the Optical Society of America. A, Optics, image science, and vision·2001
Same author

Near infrared spectroscopy for biomonitoring: cow milk composition measurement in a spectral region from 1,100 to 2,400 nanometers.

Journal of animal science·2000

Area of Science:

  • Neuroscience
  • Vision Science
  • Computational Neuroscience

Background:

  • A spatiotemporal weighting function model posits that visual responses are independent of retinal stimulation location.
  • This implies consistent temporal impulse responses and cortical spread of spatial impulse responses across different retinal sites.

Purpose of the Study:

  • To experimentally verify the model's predictions regarding retinal stimulation site independence.
  • To investigate how spatiotemporal responses differ between foveal and peripheral visual field stimulation.

Main Methods:

  • Studied spatiotemporal responses to brief, near-threshold lines presented at the fovea and periphery.
  • Measured pattern detection thresholds, assuming they reflect test stimulus peak response.
  • Analyzed the spatial spread of line responses in visual-field units and temporal impulse responses.

Related Experiment Videos

  • Utilized the weighting function model to calculate relative magnification factors and cortical spatial-impulse responses.

    • Main Results:

    • Spatial spread of line response increased with retinal eccentricity.
    • Temporal impulse responses were similar for both foveal and peripheral stimuli.
    • Calculated cortical spatial-impulse responses showed no dependence on the retinal stimulation site.

    Conclusions:

    • Experimental data align with the cortical magnification theory of peripheral vision.
    • The findings support the model's prediction that cortical spatial-impulse responses are independent of retinal stimulation location.