English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Spatial distributions of cone inputs to cells of the parvocellular pathway investigated with cone-isolating gratings.

Lee, B. B., Shapley, R. M., Hawken, M. J., & Sun, H. (2012). Spatial distributions of cone inputs to cells of the parvocellular pathway investigated with cone-isolating gratings. Journal of the Optical Society of America A-Optics Image Science and Vision, 29(2), A223-A232. doi:10.1364/JOSAA.29.00A223.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-4FC8-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-C73B-C
Genre: Journal Article

Files

show Files
hide Files
:
1406656.pdf (Publisher version), 2MB
Name:
1406656.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Lee, B. B.1, Author              
Shapley, R. M., Author
Hawken, M. J., Author
Sun, H., Author
Affiliations:
1Emeritus Group of Membrane Biophysics, MPI for Biophysical Chemistry, Max Planck Society, ou_1571137              

Content

show
hide
Free keywords: -
 Abstract: Receptive fields of midget ganglion cells and parvocellular lateral geniculate nucleus (LGN) neurons show color-opponent responses because they receive antagonistic input from the middle- and long-wavelength sensitive cones. It has been controversial as to whether this opponency can derive from random connectivity; if receptive field centers of cells near the fovea are cone-specific due to midget morphology, this would confer some degree of color opponency even with random cone input to the surround. A simple test of this mixed surround hypothesis is to compare spatial frequency tuning curves for luminance gratings and gratings isolating cone input to the receptive field center. If tuning curves for luminance gratings were bandpass, then with the mixed surround hypothesis tuning curves for gratings isolating the receptive field center cone class should also be bandpass, but to a lesser extent than for luminance. Tuning curves for luminance, chromatic, and cone-isolating gratings were measured in macaque retinal ganglion cells and LGN cells. We defined and measured a bandpass index to compare luminance and center cone-isolating tuning curves. Midget retinal ganglion cells and parvocellular LGN cells had bandpass indices between 0.1 and 1 with luminance gratings, but the index was usually near 1 (meaning low-pass tuning) when the receptive field center cone class alone was modulated. This is strong evidence for a considerable degree of cone-specific input to the surround. A fraction of midget and parvocellular cells showed evidence of incomplete specificity. Fitting the data with receptive field models revealed considerable intercell variability, with indications in some cells of a more complex receptive structure than a simple difference of Gaussians model.

Details

show
hide
Language(s): eng - English
 Dates: 2012-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1364/JOSAA.29.00A223
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of the Optical Society of America A-Optics Image Science and Vision
  Other : J. Opt. Soc. Am. A-Opt. Image Sci. Vis.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, D.C. : The Society
Pages: 10 Volume / Issue: 29 (2) Sequence Number: - Start / End Page: A223 - A232 Identifier: ISSN: 0740-3232
CoNE: /journals/resource/954925538151