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

A simple mechanism for detecting low curvatures

D Kramer1, M Fahle

  • 1Section of Visual Science, University Eye Clinic, Tübingen, Germany.

Vision Research
|May 1, 1996
PubMed
Summary

This study reveals that visual perception of curvature relies on local orientation-sensitive mechanisms. Detection thresholds for bent shapes remain consistent across various lengths, suggesting a specialized visual processing system.

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

Quantifying physical degradation alongside recording and stimulation performance of 980 intracortical microelectrodes chronically implanted in three humans for 956-2246 days.

medRxiv : the preprint server for health sciences·2024
Same author

Targeting neutrophil extracellular traps (NETs) ameliorates inflammation in murine psoriasiform dermatitis.

Journal of dermatological science·2023
Same author

A combined active shape and mean appearance model for the reconstruction of segmental bone loss.

Medical engineering & physics·2022
Same author

Subepidermal type VII collagen speckles as an additional clue for diagnosing epidermolysis bullosa acquisita by salt-split skin serum analysis.

Journal of the European Academy of Dermatology and Venereology : JEADV·2022
Same author

10<sup>th</sup> European immunogenicity platform open symposium on immunogenicity of biopharmaceuticals.

mAbs·2020
Same author

Evolution of femtosecond laser damage in a hafnia-silica multi-layer dielectric coating.

Optics letters·2019

Area of Science:

  • Visual perception
  • Psychophysics
  • Computational neuroscience

Background:

  • Human visual system's ability to perceive geometric properties is crucial for object recognition.
  • Understanding the spatial properties of visual processing units is fundamental to visual neuroscience.

Purpose of the Study:

  • To investigate the detection thresholds for curvature direction in various visual stimuli.
  • To determine the spatial extent and characteristics of curvature-sensitive visual mechanisms.
  • To explore the role of receptive field properties in curvature detection.

Main Methods:

  • Experiment 1: Measured detection thresholds for curvature direction in stimuli (arcs, lines, chevrons, trapezoids) of varying lengths.
  • Experiment 2: Assessed the influence of flanking lines on arc curvature detection thresholds to probe spatial extent.
  • Experiment 3: Examined curvature detection across different stimulus shapes to infer receptive field characteristics.

Main Results:

  • Detection thresholds for long stimuli showed a constant angle (0.2-0.3 degrees) relative to the chord.
  • Curvature detection was unaffected by flanking lines beyond 6 arc minutes, indicating local processing.
  • Results support the involvement of orientation-sensitive units with specific spatial dimensions (approx. 20 x 8 arc minutes).

Conclusions:

  • Visual perception of curvature is likely mediated by local, orientation-sensitive mechanisms.
  • These mechanisms appear to have specific spatial extents, suggesting specialized neural processing for geometric features.
  • Findings contribute to understanding the functional architecture of the human visual system.

Related Experiment Videos