question: The concept has been articulated most succinctly in the following words: ‘… the neural network for semantic memory requires a single convergence zone or hub that supports the interactive activation of representations in all modalities, for all semantic categories … damage to the hub should produce a semantic impairment that is independent of the modality of input (objects, pictures, words, sounds, tastes and so on) and of the modality of output (for example, naming an object, drawing it or using it correctly)’ (Patterson et al, 2007). 