Distinctive characteristics of subclasses of red–green 
P-cells in LGN of macaque

Lankheet, M.J.M.; Lennie, Peter; Krauskopf, John

doi:10.1017/s0952523898151027

Cited by 37 publications

(32 citation statements)

References 33 publications

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“…These animals were also studied in the preceding paper (Lankheet et al, 1998), which describes the preparation and methods for recording from single units. That paper also provides details of visual stimulation and the methods used to find a neuron's chromatic signature.…”

Section: Methodsmentioning

confidence: 99%

Temporal-chromatic interactions in LGN P-cells

1998

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We studied the interaction between the chromatic and temporal properties of parvocellular (P) neurons in the lateral geniculate nucleus (LGN) of macaque monkeys. We measured the amplitudes and phases of responses to stimulation by spatially uniform fields modulated sinusoidally about a white point in a three-dimensional color space, at a range of temporal frequencies between 1 and 25 Hz. Below about 4 Hz, temporal frequency had relatively little effect on chromatic tuning. At higher frequencies chromatic opponency was weakened in almost all cells. The complex interactions between temporal and chromatic properties are represented by a linear filter model that describes response amplitude and phase as a function of temporal frequency and direction in color space along which stimuli are modulated. The model stipulates the cone inputs to center and surround, their temporal properties, and the linear combination of center and surround signals. It predicts the amplitudes and phases of responses of P-cells, and the change of chromatic properties with temporal frequency. We used the model to investigate whether or not the chromatic signature of the surround in a red-green cell could be estimated from the change in the cell's chromatic properties with temporal frequency. Our findings could be equally well described by mixed cone surrounds as by pure cone surrounds, and we conclude that, with regard to temporal properties, there is no benefit to be gained by segregating cone classes in center and surround.

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Section: Methodsmentioning

confidence: 99%

Temporal-chromatic interactions in LGN P-cells

1998

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“…Furthermore, several previous studies of retinal ganglion cells and neurons in the lateral geniculate nucleus (LGN) did not find more off-center than on-center cells or larger responses from off-center neurons (Krüger and Fischer, 1975;Kremers et al, 1993;Kaplan, 1997, 1999). Some studies even reported that on-center retinal ganglion cells had slightly stronger responses than offcenter cells (Lankheet et al, 1998;Chichilnisky and Kalmar, 2002), the opposite of the black vs white preference observed in V1 layer 2/3 and in human perception. Jin et al (2008) reported that the termination zones of off-center LGN afferents in cat V1 (area 17) were wider than those of on-center afferents.…”

Section: Introductionmentioning

confidence: 99%

Generation of Black-Dominant Responses in V1 Cortex

Xing

Yeh

Shapley³

2010

J. Neurosci.

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Consistent with human perceptual data, we found many more black-dominant than white-dominant responses in layer 2/3 neurons of the macaque primary visual cortex (V1). Seeking the mechanism of this black dominance of layer 2/3 neurons, we measured the laminar pattern of population responses (multiunit activity and local field potential) and found that a small preference for black is observable in early responses in layer 4C␤, the parvocellular-input layer, but not in the magnocellular-input layer 4C␣. Surprisingly, further analysis of the dynamics of black-white responses in layers 4C␤ and 2/3 suggested that black-dominant responses in layer 2/3 were not generated simply because of the weak black-dominant inputs from 4C␤. Instead, our results indicated the neural circuitry in V1 is wired with a preference to strengthen black responses. We hypothesize that this selective wiring could be due to (1) feedforward connectivity from black-dominant neurons in layer 4C to cells in layer 2/3 or (2) recurrent interactions between black-dominant neurons in layer 2/3, or a combination of both.

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“…Most of the parvocellular neurons that map to central retina respond with opposite polarities when the retina is stimulated with long versus middle wavelength light (Wiesel and Hubel, 1966;De Valois et al, 1966;Gouras, 1968;De Monasterio, 1978;Derrington et al, 1984;Lankheet et al, 1998a). Recent studies strongly suggest that red-green spectral opponency results when the center of the receptive field of a parvocellular neuron gets exclusive input from either the long wavelength sensitive (L) or middle wavelength sensitive (M) cones while the concentric, spatially antagonistic receptive field surround gets exclusive input from the opposite cone type.…”

Section: Introductionmentioning

confidence: 99%