A geometry compass uses lead or a pencil to draw smooth circles and arcs in a variety of sizes. Sold on their own or in sets that include other commonly use math accessories, including protractors ...

Anchoring the neural compass: coding of local spatial reference frames in human medial parietal lobe. Nature Neuroscience, 2014; DOI: 10.1038/nn.3834 ...

The brain has a complex system for keeping track of which direction you are facing as you move about; remembering how to get from one place to another would otherwise be impossible. Researchers ...

The Geometry of Compasses; or, Problems Resolved by the mere Description of Circles, and "the Use of Coloured Diagrams and Symbols". By Oliver Byrne. (London: Crosby Lockwood and Co., 1877.) ...

More information: "Anchoring the neural compass: coding of local spatial reference frames in human medial parietal lobe." Nature Neuroscience (2014) DOI: 10.1038/nn.3834 ...