English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Alouatta trichromatic color vision: Cone spectra and physiological responses studied with microspectrophotometry and single unit retinal electrophysiology.

Silveira, L. C. L., Saito, C. A., da Silva Filho, M., Kremers, J., Bowmaker, J. K., & Lee, B. B. (2014). Alouatta trichromatic color vision: Cone spectra and physiological responses studied with microspectrophotometry and single unit retinal electrophysiology. PLoS One, 9(11): e113321. doi:10.1371/journal.pone.0113321.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-B638-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-CCF7-D
Genre: Journal Article

Files

show Files
hide Files
:
2087474.pdf (Publisher version), 1005KB
Name:
2087474.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Silveira, L. C. L., Author
Saito, C. A., Author
da Silva Filho, M., Author
Kremers, J., Author
Bowmaker, J. K., Author
Lee, B. B.1, Author              
Affiliations:
1Emeritus Group of Membrane Biophysics, MPI for Biophysical Chemistry, Max Planck Society, ou_1571137              

Content

show
hide
Free keywords: -
 Abstract: The howler monkeys (Alouatta sp.) are the only New World primates to exhibit routine trichromacy. Both males and females have three cone photopigments. However, in contrast to Old World monkeys, Alouatta has a locus control region upstream of each opsin gene on the X-chromosome and this might influence the retinal organization underlying its color vision. Postmortem microspectrophotometry (MSP) was performed on the retinae of two male Alouatta to obtain rod and cone spectral sensitivities. The MSP data were consistent with only a single opsin being expressed in each cone and electrophysiological data were consistent with this primate expressing full trichromacy. To study the physiological organization of the retina underlying Alouatta trichromacy, we recorded from retinal ganglion cells of the same animals used for MSP measurements with a variety of achromatic and chromatic stimulus protocols. We found MC cells and PC cells in the Alouatta retina with similar properties to those previously found in the retina of other trichromatic primates. MC cells showed strong phasic responses to luminance changes and little response to chromatic pulses. PC cells showed strong tonic response to chromatic changes and small tonic response to luminance changes. Responses to other stimulus protocols (flicker photometry; changing the relative phase of red and green modulated lights; temporal modulation transfer functions) were also similar to those recorded in other trichromatic primates. MC cells also showed a pronounced frequency double response to chromatic modulation, and with luminance modulation response saturation accompanied by a phase advance between 10-20 Hz, characteristic of a contrast gain mechanism. This indicates a very similar retinal organization to Old-World monkeys. Cone-specific opsin expression in the presence of a locus control region for each opsin may call into question the hypothesis that this region exclusively controls opsin expression.

Details

show
hide
Language(s): eng - English
 Dates: 2014-11-18
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1371/journal.pone.0113321
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: PLoS One
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: 11 Volume / Issue: 9 (11) Sequence Number: e113321 Start / End Page: - Identifier: -