Time-course of S-cone system adaptation to simple and complex fields

被引:13
作者
Shapiro, AG [1 ]
Beere, JL
Zaidi, Q
机构
[1] Bucknell Univ, Dept Psychol, Lewisburg, PA 17837 USA
[2] SUNY Coll Optometry, New York, NY 10036 USA
关键词
D O I
10.1016/S0042-6989(02)00687-9
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
We examine the temporal nature of adaptation at different stages of the S-cone color system. All lights were restricted to the Scone-only (a constant L and M) cardinal axis in color space passing through mid-white (W). The observer initially adapted to a steady uniform field with a chromaticity on the -S end of the axis or on the +S end of the axis or a complex field composed of chromaticy -S and +S (+/-S adaptation). The observer then readapted to a steady uniform field of chromaticity W for a variable length of time (i.e., 0, 0.1, 0.25, 0.5, 1.0, or 2.0 s). A probe-flash technique was used to measure S-cone discrimination at various points along the S-cone-only cardinal axis. This allowed estimation of the response of the S-cone system over an extended response range. Following exposure to the -S and +S uniform fields, sensitivity was maximal at or near the chromaticity of the initial adaptation field and decreased linearly away from the adapting point. The shift from +S to W occurred more rapidly than the shift from -S to W; both of these shifts can be described by a multiplicative scaling of the S-cone signal. Following +/-S adaptation the threshold curve initially had a shape similar to that measured following -S adaptation, but returned rapidly to the W adaptation state. The shift following +/-S adaptation cannot be described by the multiplicative model, but can be explained by a change in the shape of the non-linearity. The results suggest the existence of fast post-receptoral processes. (C) 2003 Published by Elsevier Science Ltd.
引用
收藏
页码:1135 / 1147
页数:13
相关论文
共 45 条
[11]   The koniocellular pathway in primate vision [J].
Hendry, SHC ;
Reid, RC .
ANNUAL REVIEW OF NEUROSCIENCE, 2000, 23 :127-153
[12]   ADDITIVITY OF OPPONENT CHROMATIC VALENCE [J].
IKEDA, M ;
AYAMA, M .
VISION RESEARCH, 1980, 20 (11) :995-999
[13]   MECHANISMS OF SIMULTANEOUS COLOR INDUCTION [J].
KRAUSKOPF, J ;
ZAIDI, Q ;
MANDLER, MB .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1986, 3 (10) :1752-1757
[14]   CARDINAL DIRECTIONS OF COLOR SPACE [J].
KRAUSKOPF, J ;
WILLIAMS, DR ;
HEELEY, DW .
VISION RESEARCH, 1982, 22 (09) :1123-1131
[15]   COLOR DISCRIMINATION AND ADAPTATION [J].
KRAUSKOPF, J ;
GEGENFURTNER, K .
VISION RESEARCH, 1992, 32 (11) :2165-2175
[16]   OPPONENT PROCESS ADDITIVITY .2. YELLOW-BLUE EQUILIBRIA AND NONLINEAR MODELS [J].
LARIMER, J ;
KRANTZ, DH ;
CICERONE, CM .
VISION RESEARCH, 1975, 15 (06) :723-731
[18]  
MacLeod D. I. A., 1997, Investigative Ophthalmology and Visual Science, V38, pS254
[19]   CHROMATICITY DIAGRAM SHOWING CONE EXCITATION BY STIMULI OF EQUAL LUMINANCE [J].
MACLEOD, DIA ;
BOYNTON, RM .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1979, 69 (08) :1183-1186
[20]   ON and OFFS-cone pathways have different long-wave cone inputs [J].
McLellan, JS ;
Eskew, RT .
VISION RESEARCH, 2000, 40 (18) :2449-2465