Source: Stanford, Dec 2015
A common assumption in traditional accounts is that concepts are context-independent amodal symbols.
There are several problems with this view and research is strong in suggesting that conceptual capacities incorporate and are structured in terms of patterns of bodily activity. Talking or thinking about objects have been suggested to imply the reactivation of previous experiences, and the recruitment of the same neural circuits involved during perception and action towards those objects would allow the re-enactment of multimodal information (color, size, width, etc).
In principle, the view that concepts are represented through abstract symbols, rather than modality specific features, and cognition requires stable forms of representation should be either dropped or strongly revisited.