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Organization of Inhibitory Frequency Receptive Fields in Cat Primary Auditory Cortex

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TLDR
A nonhomogeneous topographic distribution of inhibitory properties is consistent with the hypothesis that cat primary auditory cortex (A1) is composed of at least two functionally distinct subdivisions that may be part of different auditory cortical processing streams.
Abstract
Based on properties of excitatory frequency (spectral) receptive fields (esRFs), previous studies have indicated that cat primary auditory cortex (A1) is composed of functionally distinct dorsal an...

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Balanced inhibition underlies tuning and sharpens spike timing in auditory cortex

TL;DR: Although inhibition is typically as strong as excitation, it is not necessary to establish tuning, even in the receptive field surround, and Balanced inhibition might serve to increase the temporal precision and thereby reduce the randomness of cortical operation, rather than to increase noise as has been proposed previously.
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Mismatch negativity (MMN), the deviance-elicited auditory deflection, explained

TL;DR: It is proposed that the MMN is, in essence, a latency- and amplitude-modulated expression of the auditory N1 response, generated by fresh-afferent activity of cortical neurons that are under nonuniform levels of adaptation.
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Binary spiking in auditory cortex.

TL;DR: It is established for the first time that transient responses in auditory cortex can be described as a binary process, rather than as a highly variable Poisson process, and a re-evaluation of models of cortical processing that assume noisiness to be an inevitable feature of cortical codes is suggested.
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An ancient role for nuclear beta-catenin in the evolution of axial polarity and germ layer segregation.

TL;DR: In vivo distribution, stability and function of β-catenin protein in embryos of the sea anemone Nematostella vectensis are examined, indicating an evolutionarily ancient role for this protein in early pattern formation.
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Between sound and perception: reviewing the search for a neural code

TL;DR: A multiplexed coding of complex sound is proposed whereby the contours set up widespread synchrony across those neurons in all auditory cortical areas that are activated by the texture of sound.
References
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Journal ArticleDOI

Stimulus Specific Responses from Beyond the Classical Receptive Field: Neurophysiological Mechanisms for Local-Global Comparisons in Visual Neurons

TL;DR: The historical development of the evidence of response selectivity for visual stimuli presented beyond the CRF is traced; the anatomical pathways that sub serve these far-reaching surround mechanisms are examined; and the possible relationships between these mechanisms and perception are explored.
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Neuronal responses to static texture patterns in area V1 of the alert macaque monkey

TL;DR: Responses from neurons in area V1 of the alert macaque monkey to textured patterns modeled after stimuli used in psychophysical experiments of pop- out are consistent with a possible functional role of V1 cells in the mediation of perceptual pop-out and in the segregation of texture borders.
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Improvement in Visual Sensitivity by Changes in Local Context: Parallel Studies in Human Observers and in V1 of Alert Monkeys

TL;DR: The contextual sensitivity of human contrast thresholds and of superficial layer complex cells in monkey V1 was measured and it was shown that 42% of complex cells demonstrated facilitation for a second bar outside their classical receptive fields with a similar dependency on relative location and orientation.
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The neurophysiology of figure^ground segregation in primary visual cortex

TL;DR: The results show that context modulation within primary visual cortex has a highly sophisticated nature, putting the image features the cells are responding to into their fully evaluated perceptual context.
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The influence of contextual stimuli on the orientation selectivity of cells in primary visual cortex of the cat.

TL;DR: The results show that the filter characteristics of striate cortical cells are not necessarily fixed, but can be dynamic, changing according to context, and this study modeled a neuronal ensemble encoding orientation.
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