Regions of the Skull Flashcards
This deck will explore the anatomical regions of the skull.
Occipital bone
The bone which forms the rear base of the skull
Temporal bones
The bones which are situated on each side of the skull; further subdivided into the following regions: squamous mastoid petrous tympanic
Parietal bones
The two large, interlocking bones which make up a portion of the roof and sides of the skull
Sphenoid bone
The bone which is toward the front of the skull and forms the rear of the orbit; further subdivided into the following regions: body of the bone two greater wings two lesser wings the pterygoid processes
Ethmoid bone
The bone which is located at the roof of the nose and between the two orbits, separates the nasal cavity from the brain
Frontal bone
The bone which forms the upper front of the skull; further subdivided into the following regions:
squamous
orbital
nasal
Cranial bones
The set of bones which serve to protect the brain & brain stem and comprise the larger portion of the skull
Zygomatic bones
The bones which form the cheeks and comprise part of the orbits
Lacrimal bones
The bones which form the medial wall of the orbits
Nasal bones
The two slender bones which are fused to form the bridge of the nose
Maxilla bones
The bones which are fused to form the upper jaw
Palatine bones
The bones which are located at the back of the nasal cavity and form the roof of the mouth & floor of the orbits
Mandible
The bone which forms the lower jaw
Vomer
The small, thin bone which separates the right and left nasal cavities
Orbits
The cavity in which the eyes and its appendages are situated
Facial bones
The bones which form the facial area of the skull
Foramen/Foramina
Opening(s) inside the body which allow structures to connect to one another
Supraorbital foramen
The foramen which is located in the frontal bone and allows passage of the supraorbital vein, artery, and nerve into the orbit
Optic foramen
The foramen which is located in the sphenoid bone and allows passage of the ophthalmic after and nerve from the optical canal into the orbit
Foramen magnum
The foramen which is located in the occipital bone and allows the passage of the spinal & vertebral arteries and the spinal cord to pass from the skull into the vertebral column
Foramina of cribriform plate
The foramina which are located in the ethmoid bone and allow the passage of the olfactory nerve
Foramen rotundum
The foramen which is located in the sphenoid bone and allows passage of the maxillary nerve
Suture
A type of fibrous joint (synarthrosis) which only occurs in the skull and is what “holds” the bones in place; there are 18 sutures
Paranasal sinuses
A group of four, paired, air-filled spaces on each side of the midline of the face; they are named for the bones behind which the sit: Frontal Ethmoid Sphenoid Maxillary
