Final answer:
The fascial spaces of the face include areas like the temporal fossa and the infratemporal fossa, which contain muscles vital for jaw movement. These spaces, along with facial muscles that attach to skin and bones, facilitate facial expressions and can be areas where infections spread.
Step-by-step explanation:
Fascial Spaces of the Face
The fascial spaces of the face are potential spaces that can be involved in the spread of infection or fluid. These spaces are defined by the layers of facial muscles and bones of the facial skeleton. The muscles of facial expression, as seen in Figure 11.7, insert into the skin rather than bones, contributing to the complexity of these facial spaces. They play a crucial role in allowing us to perform facial expressions by moving the skin.
The main facial spaces include the temporal fossa and the infratemporal fossa. The temporal fossa is located on the lateral side of the brain case above the zygomatic arch and contains muscles that act on the mandible. Likewise, the infratemporal fossa is situated below the zygomatic arch and deep to the vertical portion of the mandible, which also contains muscles that assist in mastication. Both fossae are crucial in the movement and function of the jaw.
Additionally, the anatomy of the face is characterized by the presence of 14 facial bones which include the mandible, nasal bones, maxillary bones, and others. These bones provide attachment points for the facial muscles contributing to the formation of the various fascial spaces.