Interlinked cell assemblies for word forms and concepts (objects and actions) during fast-mapping. In the far-left and far-right columns, examples of CAs formation after 5 (top), 10 (middle), and 40 presentations (bottom) are shown. Each panel shows the cells activated by stimulating the auditory cortex, area A1 (dark blue), with one auditory word form pattern, which led to the activation of CAs spread across all 12 model areas. These activations are placed on a schematic illustration of the brain with the modeled cortical areas highlighted and color-coded. The color mapping between network areas and brain regions is shown in the schematic in the top-middle. Each gray box shows one simulated area of 625 excitatory cells, with active cells depicted as white dots. The three panels on the left show the CA development for an object word and those on the right that for an action word. Note the activity spreading into extrasylvian visual regions (AT, TO, and V1) for the object word and extrasylvian motor regions (PF_L, PM_L, and M1_L) for the action word, showing successful category-specific fast-mapping. In the middle column, the bar plots show the CA cell counts in each area for action (dark gray) and object (light gray) words, averaged across 20 networks and 3 CAs of each word type per network. This is shown after 5 (top), 10 (middle), and 40 (bottom) learning trials. Error bars depict SE. The colored outline of the bars maps them to their respective brain region.