Reliable short-term memory in the trion model: toward a cortical language and grammar

It has previously been shown that Hebb learning in a single column in the t rion model of cortical organisation occurs by selection. Motivated by von N ewmann's solution for obtaining reliability and by models of circulating co rtical activity, we introduce Hebb intercolumnar couplings to achieve drama tic enhancements in reliability in the firing of connected columns. In orde r for these enhancements to occur, specific temporal phase differences must exist between the same inherent spatial-temporal memory patterns in connec ted columns. We then generalize the criteria of large enhancements in the g lobal firing of the entire connected columnar network to investigate the ca se when different inherent memory patterns are in the columns. The spatial rotations as well as the temporal phases now are crucial. Only certain comb inations of inherent memory patterns meet these criteria with the symmetry properties Flaying a major role. The columnar order of these memory pattern s not in the same symmetry family can be extremely important, This fields t he first higher-level architecture of a cortical language and grammar withi n the trion model. The implications of this result with regard to an innate human language and grammar are discussed.