Color-sensitive complex cells in monkey striate cortex.

Interocular transfer of orientation-contingent color aftereffects with external and internal adaptation

“…This finding replicates previous reports regarding imagery-induced McCollough effects , '1978Kunen & May, 1980) and, in addition, shows that such effects can be obtained under adaptation conditions that do not give rise to traditional color aftereffects. With complete occlusion of the unused eye, no significant inter ocular transfer of color aftereffects was obtained when actual stimuli were used during adaptation.…”

“…First, Michael (1978) has found that many of the hypercomplex cells in the monkey striate cortex, which are color-coded and sensitive to orientation, are binocularly driven. Second, several investigators have reported some binocular transfer of pattern-contingent color aftereffects using techniques other than complete occlusion of the contralateral eye.…”

“…One of the most interesting recent developments regarding the establishment of pattern-contingent color aftereffects stems from the use of visual imagery during adaptation (Finke & Schmidt, 1977, 1978Kunen & May, 1980). In these investigations, subjects are asked to imagine different spatial patterns while they view actual nonpatterned chromatic fields.…”

Assimilative hue shifts in color depend on bar width

“…This general model of assimilation, which does not include contrast, may be made more specific by the attribution of double-opponent properties to the responsible neurons (see Michael, 1978aMichael, , 1978bMichael, , 1978c. Such an expanded version of the model can be used to explain why hue shifts are obtained for nonopponent colors, such as green and blue (see Figure 1), and why hues remain constant when the bar width exceeds the receptive field center's size (see Hurvich, 1977Hurvich, , 1981, for more details).…”

Dichoptic metacontrast masking reveals a central basis for monoptic chromatic induction

“…With the discovery of monocularly driven, dualopponent color receptive cells in the monkey striate cortex (Michael, 1978a(Michael, , 1978b(Michael, , 1978c, there is physiological evidence that a mechanism for chromatic induction exists at the cortical level. Consistent with these electrophysiological data, we present psychophysical evidence that, although confined to monocular visual pathways, the processing of signals underlying chromatic induction is primarily nonretinal.…”