The second stage of Meaningful Use requires that healthcare providers use C-CDA document exchange regularly in care transitions and the CCD has been identified as the most appropriate document for this purpose.
The part of the brain that interprets smell is the olfactory bulb.  This brain structure is usually above the nasal cavity and below  frontal lobe.
The only other chemical system that can quickly identify, make sense of and memorize new molecules is the immune system. But smell, more so than any other sense, is also intimately linked to the parts of the brain that process emotion and associative learning.