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Cover legend: The figure shows "cone clock" diagrams of responses recorded from parvocellular cells in the marmoset lateral geniculate nucleus. The vectors show the response phase and relative amplitude of response to L (red) and M (green) cone-isolating stimuli presented to the receptive field. Response phase is shown relative to the response to luminance modulation (vertical). Background shading distinguishes on-type from off-type luminance response. Increasing lag is shown by counterclockwise vector rotation. Thick vectors show excitatory cone inputs; thin vectors show inhibitory cone inputs. Each row shows a different cell class (from top): green-on, red-on, non-opponent on, green-off, red-off, non-opponent off. For opponent cells, the inhibitory inputs are in approximate opposite phase and arise from the opposite cone type, compared with the excitatory inputs. Numbers show receptive field eccentricity (distance from the fovea). For more details, see the article by Buzás et al. in this issue (pages 11148–11161).

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