This simple Tinker Toy schematic of semantic memory organization took me 11 years to develop. Sensorimotor modules (a=vision, b=motor, c=olfaction, etc) feed a low-order hub (probably the angular gyrus). The low order hub binds representations into a coarse format that is then subjected to symbolic transformations by the high order hub. Words (lex in the schematic) access symbolic representations directly. Language and percepts combine within high order hubs because they share the same root symbolic representation.