The Nature of Memory Objects in the Brain

Our mind keeps a huge number of memories. We discuss here the number \textit{M} of neurons which must be implied in one primal memory object (the smell of a rose). We find that (in a storage area which is not genetically designed) spatial and connectivity requirements impose that \textit{M} be \textit{very small} (of the order of 3). We then extend these considerations to associative memories (where the smell of a rose evokes the color of a rose).