As promised; neurons that establish a frame of reference to the room. Compare this to the research discussion about 3D reference, this is all about planar reference.
Travel constrained to paths, a common navigational context, demands knowledge of spatial relationships between routes, their components, and their positioning in the larger environment. During traversal of an environment composed of multiple...
These older threads discuss 3D coding - it’s 2D with “bending”:
2D.
Grid cells on steeply sloping terrain - evidence for planar rather than volumetric encoding
Neural encoding of large-scale three-dimensional space—properties and constraints
Neuroscience: How Is Three-Dimensional Space Encoded in the Brain?
and coding for non-spatial concepts:
Check out Matt Taylor’s superb Grid cells presentation in the HTM school!
Matt points out that thinking of grid cells as maps of a room vastly underestimates the general potential of mentally mapping any arbitrary 2D space.
Matt demonstrates the relationship between SDR representation and grid coding. I outline multiple methods of using HTM to form grids in this post. There are some pieces to put together but this combination represents a potential tool to code a reasonably intelligent agent.…
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