2,928 results found
    1. Neuroscience

    Conditioning sharpens the spatial representation of rewarded stimuli in mouse primary visual cortex

    Pieter M Goltstein et al.
    Stimulus-reward learning sharpens the local representation of the visual space while leaving the overall retinotopic map intact.
    1. Neuroscience

    A spatial memory signal shows that the parietal cortex has access to a craniotopic representation of space

    Mulugeta Semework et al.
    Neural recordings and analyses illustrate a unique lateral intraparietal area (LIP) response that may contribute to how primates can establish a memory of the environment in a useful coordinate frame, and maintain this representation of the environment over time.
    1. Neuroscience

    Dynamic representation of partially occluded objects in primate prefrontal and visual cortex

    Amber M Fyall et al.
    Complementary neural codes in frontal and visual cortex support a role for feedback signals in the representation and recognition of partially occluded objects.
    1. Computational and Systems Biology
    2. Neuroscience

    Probable nature of higher-dimensional symmetries underlying mammalian grid-cell activity patterns

    Alexander Mathis et al.
    Mathematical analysis confirms that hexagonal patterns of neuronal activity are the most efficient means for the brain to represent 2D space, and predicts that activity patterns resembling densely packed lattices are optimal for representing 3D space.
    1. Neuroscience

    The self-organization of grid cells in 3D

    Federico Stella, Alessandro Treves
    A computational model for the formation of neural networks of grid cells in virtual bats suggests that the highly ordered networks presumed to support spatial navigation in two dimensions cannot be routinely established in three-dimensional space.
    1. Neuroscience

    Development of schemas revealed by prior experience and NMDA receptor knock-out

    George Dragoi, Susumu Tonegawa
    Novel spatial representations by hippocampal cellular assemblies develop on the framework of preconfigured hippocampal networks whose homeostatic synaptic reorganization is accelerated by prior experience and CA3 NMDAR-dependent plasticity.
    1. Neuroscience

    Amygdala neural activity reflects spatial attention towards stimuli promising reward or threatening punishment

    Christopher J Peck, C Daniel Salzman
    Primate amygdala neurons provide a coordinated representation of space and motivational significance whereby amygdala responses to visual stimuli predicting either rewards or aversive stimuli could influence spatial attention in a similar manner.
    1. Neuroscience

    Entorhinal cortex receptive fields are modulated by spatial attention, even without movement

    Niklas Wilming et al.
    Moving covert attention can activate spatial representations in the Entorhinal cortex.
    1. Neuroscience

    Learning place cells, grid cells and invariances with excitatory and inhibitory plasticity

    Simon Nikolaus Weber, Henning Sprekeler
    A large variety of spatial representations implied in rodent navigation could arise robustly and rapidly from inputs with a weak spatial structure, by an interaction of excitatory and inhibitory synaptic plasticity.
    1. Neuroscience

    Social observation enhances cross-environment activation of hippocampal place cell patterns

    Xiang Mou, Daoyun Ji
    Place cells associated with track-running are activated in rats staying in a nearby box while another rat running on the track, suggesting that social observation facilitates spatial memory representations.

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