Abstract

We measured the sensitivity of macaque retinal ganglion cells and human subjects to luminance and chromatic modulation and to two combined conditions as a function of temporal frequency. For both physiological and psychophysical data, we compared the sensitivities to luminance and chromatic modulation with the sensitivities in the combined conditions, using an additivity measure. When the physiological and the psychophysical data were taken together, the results suggested that under the combined conditions psychophysical sensitivity was the envelope of independent achromatic and chromatic mechanisms with physiological substrates in the magnocellular and the parvocellular pathways, respectively. In the combined conditions tested, sensitivity appeared to be set by a chromatic channel below 3 Hz and an achromatic channel above this frequency. This hypothesis was supported by a comparison of detection sensitivities with discrimination thresholds for the presence of chromatic alternation.

© 1992 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Luminance and chromatic modulation sensitivity of macaque ganglion cells and human observers

Barry B. Lee, Joel Pokorny, Vivianne C. Smith, Paul R. Martin, and Arne Valbergt
J. Opt. Soc. Am. A 7(12) 2223-2236 (1990)

Physiological mechanisms underlying psychophysical sensitivity to combined luminance and chromatic modulation

B. B. Lee, P. R. Martin, A. Valberg, and J. Kremers
J. Opt. Soc. Am. A 10(6) 1403-1412 (1993)

Temporal response of ganglion cells of the macaque retina to cone-specific modulation

T. Yeh, B. B. Lee, and J. Kremers
J. Opt. Soc. Am. A 12(3) 456-464 (1995)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription