the simplicity of the model implies
that the literature likely contains particularly simple or complex
findings that cannot be easily accommodated. One prominent example is the involvement of the PCC in a variety of cognitive functions including self-referential processing and episodic memory.
However, given that attempts to decompose the default network are in the
early stage and have thus far produced few models, these limitations
do not detract from the ability of the current model to provide a useful
foundation that can guide further research efforts on related
topics.