Document Detail


The dimensionality of color vision in carriers of anomalous trichromacy.
MedLine Citation:
PMID:  20884587     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Some 12% of women are carriers of the mild, X-linked forms of color vision deficiencies called "anomalous trichromacy." Owing to random X chromosome inactivation, their retinae must contain four classes of cone rather than the normal three; and it has previously been speculated that these female carriers might be tetrachromatic, capable of discriminating spectral stimuli that are indistinguishable to the normal trichromat. However, the existing evidence is sparse and inconclusive. Here, we address the question using (a) a forced-choice version of the Rayleigh test, (b) a test using multidimensional scaling to reveal directly the dimensionality of the participants' color space, and (c) molecular genetic analyses to estimate the X-linked cone peak sensitivities of a selected sample of strong candidates for tetrachromacy. Our results suggest that most carriers of color anomaly do not exhibit four-dimensional color vision, and so we believe that anomalous trichromacy is unlikely to be maintained by an advantage to the carriers in discriminating colors. However, 1 of 24 obligate carriers of deuteranomaly exhibited tetrachromatic behavior on all our tests; this participant has three well-separated cone photopigments in the long-wave spectral region in addition to her short-wave cone. We assess the likelihood that behavioral tetrachromacy exists in the human population.
Authors:
Gabriele Jordan; Samir S Deeb; Jenny M Bosten; J D Mollon
Related Documents :
3048707 - Mechanisms of color vision.
19506637 - Design of vertically-stacked polychromatic light-emitting diodes.
11175007 - Color kinesis: principles of operation and technical guidelines.
22023577 - Bold coloration and the evolution of aposematism in terrestrial carnivores.
22833947 - Insonation frequency selection may assist detection and therapeutic delivery of targete...
10996147 - Intense noise induces formation of vasoactive lipid peroxidation products in the cochlea.
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2010-07-01
Journal Detail:
Title:  Journal of vision     Volume:  10     ISSN:  1534-7362     ISO Abbreviation:  J Vis     Publication Date:  2010  
Date Detail:
Created Date:  2010-10-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  12     Citation Subset:  IM    
Affiliation:
Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK. Gabriele.Jordan@ncl.ac.uk
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Grant Support
ID/Acronym/Agency:
058711/Z/99/Z/LA/ra/ad//Wellcome Trust; EY008395/EY/NEI NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Distinguishing between parallel and serial accounts of multiple object tracking.
Next Document:  Cortical distance determines whether flankers cause crowding or the tilt illusion.