My research into AI and artificial minds took me into the latest developments of DeepMind, the research arm of Google. I was intrigued to learn in this article that the increasing sophistication of AI is in turn advancing our understanding of the human brain – specifically here in relation to how we navigate space. It particularly fascinated me this notion of there being cells specialised to certain sensations (a bit like the individual conscious agents that Hoffman mentioned in the interview I posted – the specialised cells all contributing to one seamless conscious experience of space) – one type acting as a ‘you are here’, one for the direction of your head, and another forming a grid for relative position/spacing.
This regular pattern of grid cells was especially intriguing for me – here it referenced a hexagon, though it could also be considered a tesselated pattern of triangles. It has previously been proven in rat brains, and only in the past few years have we seen early proofs it could too be present in humans.
I love this notion of a secret/hidden mental map that is created to help us navigate the world, that is underlying our visual interpretation of the world. I wondered too if there could be a future in which we could ‘hack’ this secret mental mapping system, to make familiar spaces that we are new to, or allow you to immediately understand the best route through a maze, for instance. Use of this regularised grid could help you to better predict or adjust to new situations, which of course the Future is the ultimate one.
This strikes me as similar to the dots used in motion capture technology – to help digital imaging ‘navigate’ an actor’s body/face in order to best map it to a 3D computer generated image.
That this should be in a hexagonal grid was also very intriguing for me. Instinctively, I imagine organic forms and shapes to be irregular, curved, amorphous, but hexagons are geometric, regular, straight edged. That said it is a form we do see in nature, for instance in honeycomb structure, or the basalt columns visible in places such as a the Giants Causeway. It is described as being the most ‘efficient’ shape, and hence why the cooling rock forms in this way. It is also described as the strongest shape – hence it’s use in the structure of the strongest known material, graphene.
It was thus especially eery to come across this display in the Whitworth, just a day after reading of grid cells.
I was interested too to see what these grid cells might look like in reality. Unfortunately it does not seem there are specific electron microscope images of these in existence, so I instead looked to images of generic neurons.