An important concept introduced in this region is that of autonomic innervation.
If you conceptualize the neck as a series of tubes within tubes, each transmitting structures
that are often functionally related, it will help you understand the anatomy and clinical relevance
of this area.
The concept of compartmentalization of muscles into functional groups, each with its common
nerve supply, is revisited. A good example of this compartmentalization is the face (muscles of
facial expression innervated by C.N.VII and muscles of mastication innervated by C.N. V).