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

Temporal-frequency tuning of direction selectivity in cat visual cortex.

A B Saul1, A L Humphrey

  • 1Department of Neurobiology, Anatomy, and Cell Science, University of Pittsburgh School of Medicine, PA 15261.

Visual Neuroscience
|April 1, 1992
PubMed
Summary
This summary is machine-generated.

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

Visual cortical simple cells: who inhibits whom.

Visual neuroscience·1999
Same author

Cell types and response timings in the medial interlaminar nucleus and C-layers of the cat lateral geniculate nucleus.

Visual neuroscience·1999
Same author

Inhibitory contributions to spatiotemporal receptive-field structure and direction selectivity in simple cells of cat area 17.

Journal of neurophysiology·1999
Same author

Strobe rearing reduces direction selectivity in area 17 by altering spatiotemporal receptive-field structure.

Journal of neurophysiology·1998
Same author

Strobe rearing prevents the convergence of inputs with different response timings onto area 17 simple cells.

Journal of neurophysiology·1998
Same author

Laminar differences in the spatiotemporal structure of simple cell receptive fields in cat area 17.

Visual neuroscience·1998

Direction selectivity in the cat visual cortex is strongest at low temporal frequencies (1-2 Hz). At higher frequencies (around 4 Hz), direction selectivity diminishes or is lost in many cells, potentially due to neural input timing.

Area of Science:

  • Neuroscience
  • Visual Cortex Research
  • Sensory Processing

Background:

  • The visual cortex processes visual information, including motion direction.
  • Direction selectivity is a key feature of neurons in the visual cortex.
  • Temporal frequency influences neuronal responses and direction selectivity.

Purpose of the Study:

  • To investigate how temporal frequency affects direction selectivity in cat visual cortex.
  • To explore the underlying neural mechanisms of altered direction selectivity at different temporal frequencies.

Main Methods:

  • Extracellular recordings from 71 neurons in areas 17 and 18 of the cat visual cortex.
  • Stimulation using drifting gratings at various temporal frequencies in preferred and non-preferred directions.

Related Experiment Videos

  • Analysis of neuronal responses to determine direction selectivity and optimal temporal frequencies.

    • Main Results:

    • Direction selectivity was most pronounced at 1-2 Hz temporal frequencies.
    • Approximately 20% of cells showed reduced or lost direction selectivity around 4 Hz.
    • Some cells exhibited a reversal of preferred direction at higher temporal frequencies.

    Conclusions:

    • Temporal frequency significantly impacts direction selectivity in the visual cortex.
    • Suppression and recovery of responses in the non-preferred direction may explain changes in selectivity.
    • Lagged and non-lagged inputs from the lateral geniculate nucleus, with shifting phase differences, could underlie these observations.