Assertion: cerebellum's cortex | /r/MadeOf | grid cells
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text: Navigation system comprises a whole network of structures: (1) the hippocampus containing «place cells», which correlate with animal's location in space and underlie animal's spatial representation (O'Keefe and Dostrovsky, 1971), (2) the medial enthorinal cortex, containing «grid cells» which fire according to a grid-like pattern and are thought to constitute the metric system of the brain (Hafting et al., 2005), (3) a network of structures—among which the retrospenial cortex—containing «head direction cells», specific for a given direction of the head in space (Taube et al., 1990), and (4) posterior parietal cortex containing «movement cells», encoding self-motion and acceleration (Whitlock et al., 2012).