A proposed architecture for the neural representation of spatial context

@article{Jeffery2004APA,
  title={A proposed architecture for the neural representation of spatial context},
  author={Kate J. Jeffery and Michael I. Anderson and Robin M. A. Hayman and Subhojit Chakraborty},
  journal={Neuroscience \& Biobehavioral Reviews},
  year={2004},
  volume={28},
  pages={201-218}
}
Behavioral correlates of the distributed coding of spatial context
TLDR
Two naturalistic measures of context processing in rats are used to explore how rats responded to contextual novelty and to relate this to the behavior of place cells, suggesting that heterogeneous context encoding by place cells may function to allow the flexible assignment of associations to contexts.
Hippocampal and neocortical interactions during context discrimination: Electrophysiological evidence from the rat
TLDR
Evidence that a primary consequence of hippocampal processing is the discrimination of meaningful contexts is described, and the functional significance of neocortical circuits that likely receive hippocampal output messages are described in terms of their contribution to the control of ongoing behavioral and cognitive strategy, especially during active navigation.
Space and context in the temporal cortex
  • D. Bilkey
  • Psychology, Medicine
    Hippocampus
  • 2007
TLDR
A simple mechanism, based on place field density across an environment, is described that could allow hippocampal representations to be “read” by other brain regions for the purpose of navigation.
Plasticity of the Hippocampal Place Cell Representation
TLDR
Evidence is reviewed that the place cell representation is indeed plastic, and that its plasticity depends on the same neurobiological mechanisms known to underlie experimentally induced synaptic plasticity.
The hippocampus , context processing and episodic memory
Contextual information plays a critical role in memory. Learned information becomes associated with the learning context and the context can cue the memories and behaviors associated with that
Framing spatial cognition: neural representations of proximal and distal frames of reference and their roles in navigation.
TLDR
The historical underpinnings of the "standard" view from a behavioral perspective are reviewed, and newer results demonstrating that an animal's behavior in such spatial tasks is more strongly controlled by a local-apparatus frame of reference than by distal landmarks are reviewed.
Integration of geometric and contextual inputs to hippocampal place cells.
Neurons in the rodent hippocampus fire in highly restricted portions of an environment. These place cells have receptive fields called place fields and are argued to form a representation of space.
Learning-Related Development of Context-Specific Neuronal Responses to Places and Events: The Hippocampal Role in Context Processing
TLDR
Results provide direct support for a context processing role of the hippocampus and suggest that the hippocampus contributes contextual representations to episodic memories.
An attractor network in the hippocampus: theory and neurophysiology.
  • E. Rolls
  • Psychology, Medicine
    Learning & memory
  • 2007
TLDR
A quantitative computational theory of the operation of the CA3 system as an attractor or autoassociation network is described and the concept that the CA1 recodes information from CA3 and sets up associatively learned back-projections to neocortical to allow subsequent retrieval of information to neocortex provides a quantitative account of the large number of hippocampo-neocortical back- projections.
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References

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TLDR
It is demonstrated, for the first time, that there is a heterogeneous input by contextual inputs into the hippocampus, and a model of contextual remapping of place cells is proposed in which the geometric inputs are selectively activated by subsets of contextual stimuli.
Context‐specific acquisition of location discrimination by hippocampal place cells
TLDR
It is found that the acquired information did not transfer to the new context, suggesting that the context inputs and the acquired inputs must interact somewhere upstream of the place cells themselves, thus explaining the context specificity of the new learning.
Path Integration and Cognitive Mapping in a Continuous Attractor Neural Network Model
TLDR
The model provides an explanation for a number of hitherto perplexing observations on hippocampal place fields, including doubling, vanishing, reshaping in distorted environments, acquiring directionality in a two-goal shuttling task, rapid formation in a novel environment, and slow rotation after disorientation.
The dorsal hippocampus is essential for context discrimination but not for contextual conditioning.
TLDR
Together, these data dissociate hippocampal and nonhippocampal contributions to contextual conditioning, and they provide direct evidence that the hippocampus plays an essential role in the processing of contextual stimuli.
Preserved performance in a hippocampal‐dependent spatial task despite complete place cell remapping
TLDR
Although the change from black to white induced remapping of most place cells, navigational performance remained essentially intact, suggesting that the spatial information needed to solve this navigation task is represented outside the hippocampus and suggest that the place cells encode some other aspect, such as the spatial context.
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Dissociation of the geometric and contextual influences on place cells
TLDR
A model of color-induced remapping in which place cells respond not simply to walls, but to walls of a specific color is suggested, which suggests a spatial shift of the firing location of place cells should occur only after changes to those aspects of the environment that convey spatially localizing information to the cells.
Geometric determinants of the place fields of hippocampal neurons
TLDR
The identification of the environmental features controlling the location and shape of the receptive fields (place fields) of the place cells is reported, and a model in which the place field is formed by the summation of gaussian tuning curves.
Hippocampal synaptic plasticity: role in spatial learning or the automatic recording of attended experience?
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TLDR
This hypothesis retains the idea that LTP subserves rapid one-trial memory, but abandons the notion that it serves any specific role in the geometric aspects of spatial learning.
The Role of the Hippocampus in Solving the Morris Water Maze
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It is suggested that the hippocampus plays two roles that allow rodents to solve the hidden-platform water maze: self-localization and route replay, and these two mechanisms can coexist and form a basis for memory consolidation.
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