Journal ArticleDOI
Neuronal circuits of the neocortex
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TLDR
It is found that, as has long been suspected by cortical neuroanatomists, the same basic laminar and tangential organization of the excitatory neurons of the neocortex is evident wherever it has been sought.Abstract:
We explore the extent to which neocortical circuits generalize, i.e., to what extent can neocortical neurons and the circuits they form be considered as canonical? We find that, as has long been suspected by cortical neuroanatomists, the same basic laminar and tangential organization of the excitatory neurons of the neocortex is evident wherever it has been sought. Similarly, the inhibitory neurons show characteristic morphology and patterns of connections throughout the neocortex. We offer a simple model of cortical processing that is consistent with the major features of cortical circuits: The superficial layer neurons within local patches of cortex, and within areas, cooperate to explore all possible interpretations of different cortical input and cooperatively select an interpretation consistent with their various cortical and subcortical inputs.read more
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Proceedings ArticleDOI
State-dependent sensory processing in networks of VLSI spiking neurons
TL;DR: This work shows that recurrently connected instances of neural circuits can have persistent activity states, which can be used as a form of working memory, and argues that such circuits can perform state-dependent computation.
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Curtailing effect of awakening on visual responses of cortical neurons by cholinergic activation of inhibitory circuits.
Rui Kimura,Mir-Shahram Safari,Javad Mirnajafi-Zadeh,Rie Kimura,Teppei Ebina,Yuchio Yanagawa,Kazuhiro Sohya,Tadaharu Tsumoto +7 more
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TL;DR: This issue of Neuron presents an intriguing study that suggests that properties of objects other than shape can influence the arrangement of object selectivities in visual areas.
Journal ArticleDOI
Comparative molecular neuroanatomy of mammalian neocortex: What can gene expression tell us about areas and layers?
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Journal ArticleDOI
Callosal axon arbors in the limb representations of the somatosensory cortex (SI) in the agouti (Dasyprocta primnolopha).
E.G. Rocha,Lucidia Fonseca Santiago,Marco Aurelio M. Freire,Walace Gomes-Leal,Ivanira Amaral Dias,Roberto Lent,Jean-Christophe Houzel,João G. Franca,Antonio Pereira,Cristovam W. Picanço-Diniz +9 more
TL;DR: The present report compares the morphology of callosal axon arbors projecting from and to the hind‐ or forelimb representations in the primary somatosensory cortex of the agouti, a large, lisencephlic Brazilian rodent that usesForelimb coordination for feeding, and concludes that the sets of callosa axon connecting fore‐ and hindlimb regions in SI are morphometrically distinct from each other.
References
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Journal ArticleDOI
Receptive fields, binocular interaction and functional architecture in the cat's visual cortex
David H. Hubel,Torsten N. Wiesel +1 more
TL;DR: This method is used to examine receptive fields of a more complex type and to make additional observations on binocular interaction and this approach is necessary in order to understand the behaviour of individual cells, but it fails to deal with the problem of the relationship of one cell to its neighbours.
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Distributed Hierarchical Processing in the Primate Cerebral Cortex
TL;DR: A summary of the layout of cortical areas associated with vision and with other modalities, a computerized database for storing and representing large amounts of information on connectivity patterns, and the application of these data to the analysis of hierarchical organization of the cerebral cortex are reported on.
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Hierarchical models of object recognition in cortex
TL;DR: A new hierarchical model consistent with physiological data from inferotemporal cortex that accounts for this complex visual task and makes testable predictions is described.
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Neuromorphic electronic systems
TL;DR: It is shown that for many problems, particularly those in which the input data are ill-conditioned and the computation can be specified in a relative manner, biological solutions are many orders of magnitude more effective than those using digital methods.
Journal ArticleDOI