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Normal and Defective Colour Vision$
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John D. Mollon, Joel Pokorny, and Ken Knoblauch

Print publication date: 2003

Print ISBN-13: 9780198525301

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780198525301.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 20 October 2021

Spatial Contrast Sensitivity for Pulsed- and Steady-Pedestal Stimuli

Spatial Contrast Sensitivity for Pulsed- and Steady-Pedestal Stimuli

Chapter:
(p.108) Chapter 11 Spatial Contrast Sensitivity for Pulsed- and Steady-Pedestal Stimuli
Source:
Normal and Defective Colour Vision
Author(s):

Anna Leonova

Joel Pokorny

Vivianne C. Smith

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198525301.003.0011

This chapter evaluates spatial modulation sensitivity under conditions inferred to favour magnocellular (MC) and parvocellular (PC) pathways. Pulsed- and Steady-Pedestal Paradigms revealed characteristic differences in spatial frequency processing. Pulsed-Pedestal D6 spatial contrast sensitivity functions are mediated by the PC-pathway. Steady-Pedestal contrast sensitivity functions are mediated by the MC-pathway at low spatial frequencies, and by the PC-pathway above 4 cycles/deg. These data support the hypothesis of a major role for the PC-pathway in achromatic spatial vision.

Keywords:   spatial modulation, magnocellular, parvocellular, Pulsed-Pedestal Paradigm, Steady-Pedestal Paradigm, achromatic spatial vision

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