How many deep cervical fascia are there?

Hey,

A lecturer mentioned that there are “4 deep cervical fascia” today, and I am trying to understand what he meant.

This site seems to think there’s a lot more than four:

http://www.wikiradiography.com/page/Deep+Cervical+Fasciae+of+the+Neck

Could someone please shed some light on this?

Thanks in advance!