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Place navigation impaired in rats with hippocampal lesions
It is reported that, in addition to a spatial discrimination impairment, total hippocampal lesions also cause a profound and lasting placenavigational impairment that can be dissociated from correlated motor, motivational and reinforcement aspects of the procedure.
Phase relationship between hippocampal place units and the EEG theta rhythm
The phase was highly correlated with spatial location and less well correlated with temporal aspects of behavior, such as the time after place field entry, and the characteristics of the phase shift constrain the models that define the construction of place fields.
An oscillatory interference model of grid cell firing
It is proposed that the oscillatory interference mechanism proposed for the phase precession effect in place cells underlies the grid‐like firing pattern of dorsomedial entorhinal grid cells, and possible variations on the basic model are outlined, including the generation of grid-like firing via the interaction of multiple cells rather than via multiple dendritic subunits.
Geometric determinants of the place fields of hippocampal neurons
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.
Place units in the hippocampus of the freely moving rat
- J. O’Keefe
- Medicine, PsychologyExperimental Neurology
- 31 December 1976
The results suggest that place units were not responding to a simple sensory stimulus nor to a specific motor behavior, and are interpreted as strong support for the cognitive map theory of hippocampal function.
The Hippocampus as a Cognitive Map
Table of Contents: Chapter 1 - Remembrance of places past: a history of theories of space / Chapter 2 - Spatial behaviour / Chapter 3 - Anatomy / Chapter 4 - Physiology / Chapter 5 - Introduction to…
The Hippocampus Book
1. he Hippocampal Formation 2. Historical Perspective: Proposed Functions, Biological Characteristics and Neurobiological Models of the Hippocampus 3. Hippocampal Neuroanatomy 4. Morphological…
The Human Hippocampus and Spatial and Episodic Memory
A review of neuropsychological, behavioral, and neuroimaging studies of human hippocampal involvement in spatial memory concentrates on three important concepts in this field: spatial frameworks, dimensionality, and orientation and self-motion.
Boundary Vector Cells in the Subiculum of the Hippocampal Formation
- C. Lever, S. Burton, A. Jeewajee, J. O’Keefe, N. Burgess
- Psychology, MedicineThe Journal of Neuroscience
- 5 August 2009
The existence of cells fulfilling this description in recordings from the subiculum of freely moving rats are reported, and their relationship to other cell types, including medial entorhinal “border cells,” is discussed.
Independent rate and temporal coding in hippocampal pyramidal cells
It is shown that the time of firing and firing rate are dissociable, and can represent two independent variables: respectively the animal's location within the place field, and its speed of movement through the field.