Grid cell
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A grid cell is a type of neuron within the entorhinal cortex that fires at regular intervals as an animal navigates an open area, allowing it to understand its position in space by storing and integra
Trajectory of a rat through a square environment is shown in black. Red dots indicate locations at which a particular entorhinal grid cell fired.
Spatial autocorrelogram of the neuronal activity of the grid cell from the first figure.
Hippocampus
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The hippocampus, also hippocampus proper, is a major component of the brain of humans and many other vertebrates. In the human brain the hippocampus, the dentate gyrus, and the subiculum are component
Grid cell
…there is no perceptible regularity in their arrangement. In 1971 John O'Keefe and Jonathon Dostrovsky reported the discovery of place cells in the rat hippocampus—cells that fire action potentials when an animal passes through a specific small region of space, which is called the place field of the cell. This…
The human hippocampus and fornix (left) compared with a seahorse (right)
Coronal section of the brain of a macaque monkey, showing hippocampal formation (circled)
Hippocampal subfields and subregions
Drawing by Italian pathologist Camillo Golgi of a hippocampus stained using silver nitrate