Facilitation and suppression of single striate-cell activity by spatially discrete pattern stimuli presented beyond the receptive field

@article{Mizobe2001FacilitationAS,
  title={Facilitation and suppression of single striate-cell activity by spatially discrete pattern stimuli presented beyond the receptive field},
  author={Keiko Mizobe and Uri Polat and Mark W. Pettet and Takuji Kasamatsu},
  journal={Visual Neuroscience},
  year={2001},
  volume={18},
  pages={377 - 391},
  url={https://api.semanticscholar.org/CorpusID:12541180}
}
Visual stimulation of a region outside the receptive field of single cells in visual cortex often results in the modulation of their responses. The modulatory effects are thought to be mediated through lateral connections within visual cortex. Research on lateral interactions commonly shows suppression. There has been no systematic study of the optimal conditions for facilitation. Here we have studied the nature of the modulation using a new type of compound stimulus: contrast reversal of… 

Contrast dependence of center and surround integration in primary visual cortex of the cat.

The magnitudes of spike responses of area 17 (striate cortex, area V1) neurons to stimulation of their classical receptive fields were reduced when the stimuli extended into the silent surround regions, and the surround modulation tended to be clearly suppressive at high contrast and less suppressive or even facilitatory at low contrast.

Collinear facilitation is independent of receptive-field expansion at low contrast

It is found that RF expansion at low contrast was not universal, and that the spatial extent of RF expansion, when it existed, was smaller than that of collinear flanker modulation, which concludes that the two processes in striate cortex work independently from each other.

CONTEXTUAL EFFECTS IN THE PRIMARY VISUAL CORTEX OF ANESTHETIZED CATS

Firing rates and synchrony may represent two distinct and complementary mechanisms for the encoding of different aspects of contextual information and the grouping of responses and thus are a possible neurophysiological substrate of perceptual figure-ground segregation.

The spatial extent over which neurons in macaque striate cortex pool visual signals

We recorded activity of single units in macaque monkey primary visual cortex (V1) to define the retinotopic extent of the visual inputs that drive or modulate V1 neuron responses in parafoveal and…

Effects of surround motion on receptive-field gain and structure in area 17 of the cat

It is concluded that neurons in cat area 17 act like scalable filters, meaning that their gains can be adjusted by stimuli in the surrounds without altering the properties of the CRF.

Population response to contextual influences in the primary visual cortex.

It is shown that synchrony is a superior code over amplitude, for discriminating collinear from orthogonal pattern, and suggested that population synchrony can serve as a code to discriminate contextual effects.

Muscimol and baclofen differentially suppress retinotopic and nonretinotopic responses in visual cortex

The differential suppression of the FLC and SDC found in the present study is consistent with the notion that intracortical electrical signals related to the FLLC terminate on the somata and proximal/basal dendrites, while thoserelated to the SDC terminate on distalDendrites.

Time Course and Time-Distance Relationships for Surround Suppression in Macaque V1 Neurons

It is found that orientation-tuned suppression could effectively propagate across 6 - 8 mm of cortex at ∼1 m/sec, considerably faster than expected for horizontal cortical connections previously implicated in surround suppression.
...

Collinear stimuli regulate visual responses depending on cell's contrast threshold

It is shown that neuronal facilitation preferentially occurs when a near-threshold stimulus inside the receptive field is flanked by higher-contrast, collinear elements located in surrounding regions of visual space.

Characteristics of surround inhibition in cat area 17

Inhibition by orientations flanking the optimum could serve to sharpen orientation selectivity in the presence of contextual stimuli and to enhance orientational contrast; and it may play a part in orientation contrast illusions.

Visual cortical mechanisms detecting focal orientation discontinuities

A mechanism integrating orientation-dependent information over adjacent areas of visual space to represent focal orientation discontinuities such as junctions or corners is proposed.

Suppression outside the classical cortical receptive field

Results show that surround suppression is a prevalent form of inhibition and may play an important role in visual processing and simple and complex cell types exhibit equal incidences of surround suppression.

Asymmetric Suppression Outside the Classical Receptive Field of the Visual Cortex

The spatial organization of surrounds of single-cell receptive fields in the primary visual cortex of anesthetized, paralyzed cats is examined to demonstrate that the surrounds are more specific than previously realized, and this specialization has implications for the processing of visual information in thePrimary visual cortex.

Subthreshold facilitation and suppression in primary visual cortex revealed by intrinsic signal imaging.

It is demonstrated that the relative contrast of center and surround stimuli regulates whether surround interactions are facilitative or suppressive: the same surround stimulus facilitates responses when Center contrast is low, but suppresses responses when center contrast is high.

Contrast dependence of contextual effects in primate visual cortex

The way that single neurons integrate information across the visual field depends not only on the precise form of stimuli at different locations, but also crucially on their relative contrasts, which reflect a complex gaincontrol mechanism that regulates cortical neuron responsiveness.

Contrast response characteristics of long-range lateral interactions in cat striate cortex

A sensitivity modulation model is proposed that accounts for all the four types of lateral effects by changes in two parameters and changes in neighboring neurons changes the sensitivities of the target neuron to both the direct feedforward input and inhibitory, divisive feedback from neighboring neurons.
...