Concept

Grid cell

Related publications (50)

Spatial orientation in navigating agents: Modeling head-direction cells

A model that is consistent with several neurophysiological properties of biological head-direction cells is presented. The dynamics of the system is primarily controlled by idiothetic signals which determine the direction selectivity property. By means of ...

Elsevier2001

Spatial cognition and neuro-mimetic navigation: a model of hippocampal place cell activity

Wulfram Gerstner

A computational model of hippocampal activity during spatial cognition and navigation tasks is presented. The spatial representation in our model of the rat hippocampus is built on-line during exploration via two processing streams. An allothetic vision-ba ...

Springer Verlag2000

Dynamic load balancing of parallel cellular automata

Roger Hersch, Marc Mazzariol

We are interested in running in parallel cellular automata. We present an algorithm which explores the dynamic remapping of cells in order to balance the load between processing nodes. The parallel application runs on a cluster of PCs connected by Fast-Eth ...

SPIE-Int. Soc. Opt. Eng2000

Coupling of organotypic brain slice cultures to silicon-based arrays of electrodes

Fetal or early postnatal brain tissue can be cultured in viable and healthy condition for several weeks with development and preservation of the basic cellular and connective organization as so-called organotypic brain slice cultures. Here we demonstrate a ...

1999

Learning navigational maps through potentiation and modulation of hippocampal place cells

Wulfram Gerstner

We analyze a model of navigational map formation based on correlation-based, temporally asymmetric potentiation and depression of synapses between hippocampal place cells. We show that synaptic modification during random exploration of an environment shift ...

1997

Noradrenaline increases K-conductance and reduces glutamatergic transmission in the mouse entorhinal cortex by activation of alpha 2-adrenoreceptors

Pierre Magistretti, Emilie Pralong

The entorhinal cortex is a gateway to the hippocampus; it receives inputs from several cortical associative areas as well as subcortical areas. Since there is evidence showing that noradrenaline reduces the epileptic activity generated in the entorhinal co ...

1995

Real-Time Measurement of the Contribution of the Muscular- Activity to the Metabolic-Rate in Freely Moving Rats

Kamiar Aminian, Philippe Robert

A new real-time ergometric system, ERGORAT, for measuring the energy expenditure due to muscular activity of small mammals is described. The method is based on measuring the vibrations induced by a freely moving rat to a platform on which it is living. Six ...

1993

Actions of norepinephrine in the rat hippocampus

Henry Markram

Acting at postsynaptic alpha 1- and beta 1-receptors, norepinephrine (NE) exerts a complex action in rat hippocampus. It is currently believed that beta 1-receptor activation enhances excitability of recorded neurons, whereas alpha 1 activation suppresses ...

1991

Calcimycin potentiates responses of rat hippocampal neurons to N-methyl-D-aspartate

Henry Markram

We examined the effect of elevating intracellular calcium ([Ca2+]i) on responses to iontophoretically applied N-methyl-D-aspartate (NMDA), and quisqualate in CA1 neurons of the hippocampal slice. Topical application of calcimycin (A23187), a calcium ionoph ...

1991

The distribution and morphological characteristics of the intracortical VIP-positive cell: an immunohistochemical analysis

Pierre Magistretti

Using a sensitive immunohistochemical procedure, we have undertaken a detailed morphological characterization of the vasoactive intestinal peptide-positive (VIP-positive) neuron in the cerebral cortex of the rat. VIP-positive neurons are present in all reg ...

1984

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