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.
When you first smelled the sock, you were able to send signals up to your brain which registered inside of the brain as a certain type of smell. The nerves responsible for sensing a stimulus and sending information about the stimulus to your central nervous system are called afferent neurons.