which is right and left on sagittal dog ct skull

The somewhat larger lateral pterygoid plates serve as attachment sites for chewing muscles that fill the infratemporal space and act on the mandible. The right and left medial pterygoid plates form the posterior, lateral walls of the nasal cavity. These are the medial pterygoid plate and lateral pterygoid plate (pterygoid = “wing-shaped”). On the inferior aspect of the skull, each half of the sphenoid bone forms two thin, vertically oriented bony plates. The greater wing is best seen on the outside of the lateral skull, where it forms a rectangular area immediately anterior to the squamous portion of the temporal bone. The greater wings of the sphenoid bone extend laterally to either side away from the sella turcica, where they form the anterior floor of the middle cranial fossa. The rounded depression in the floor of the sella turcica is the hypophyseal (pituitary) fossa, which houses the pea-sized pituitary (hypophyseal) gland. This bony region of the sphenoid bone is named for its resemblance to the horse saddles used by the Ottoman Turks, with a high back and a tall front. The sella turcica (“Turkish saddle”) is located at the midline of the middle cranial fossa. Inside the cranial cavity, the right and left lesser wings of the sphenoid bone, which resemble the wings of a flying bird, form the lip of a prominent ridge that marks the boundary between the anterior and middle cranial fossae. The sphenoid forms much of the base of the central skull and also extends laterally to contribute to the sides of the skull (see Figure 6.18). It serves as a “keystone” bone, because it joins with almost every other bone of the skull. The sphenoid bone is a single, complex bone of the central skull (Figure 6.22). This structure serves as an attachment site for several small muscles and for a ligament that supports the hyoid bone of the neck. Posterior to the mandibular fossa on the external base of the skull is an elongated, downward bony projection called the styloid process, so named because of its resemblance to a stylus (a pen or writing tool). The mastoid process can easily be felt on the side of the head just behind your earlobe. Projecting inferiorly from this region is a large prominence, the mastoid process, which serves as a muscle attachment site. Posteriorly is the mastoid portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. The flattened, upper portion is the squamous portion of the temporal bone.

The temporal bone is subdivided into several regions (Figure 6.19). Common wisdom has it that the temporal bone (temporal = “time”) is so named because this area of the head (the temple) is where hair typically first turns gray, indicating the passage of time. The temporal bone forms the lower lateral side of the skull (see Figure 6.18).

The 22nd bone is the mandible (lower jaw), which is the only moveable bone of the skull. In the adult, the skull consists of 22 individual bones, 21 of which are immobile and united into a single unit. The rounded brain case surrounds and protects the brain and houses the middle and inner ear structures. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws. It is subdivided into the facial bones and the brain case, or cranial vault (Figure 6.16). The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain.

Which is right and left on sagittal dog ct skull