Answer:
The anatomic relationships existing within the facial soft-tissue layers are:
1. The superficial facial fascia invests the superficially situated mimetic muscles (platysma, orbicularis oculi, zygomaticus major and minor).
2. The deep facial fascia represents a continuation of the deep cervical fascia cephalad into the face; the importance of which lies in the fact that the facial nerve branches within the cheek lie deep to this fascial layer.
3. Two types of relationships exist between the superficial and deep facial fascias: in some regions of the face, these layers are separated by an areolar plane, and in other regions of the face, the two are intimately adherent to one another through a series of dense fibrous attachments.