Term
| How many cranial bones are in the skull? |
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Definition
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Term
| What are the 8 cranial bones? |
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Definition
(Calvaria) 1. Frontal, 2. Occipital, 3. Right parietal, 4. Left parietal
(Floor) 5. Ethmoid, 6. Sphenoid, 7. Right temporal, 8. Left temporal |
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Term
| Old People From Texas Eat Spiders: |
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Definition
| Orbits, Parietal x 2, Frontal, Temporal x 2, Ethmoid, Sphenoid |
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Term
| What are the two divisions of the CRANIAL bones? |
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Definition
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Term
| Infants have 6 areas of incomplete ossification called: |
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Definition
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Term
| Internally, the cranial floor is divided into three regions: |
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Definition
| anterior, middle, and posterior cranial fossae |
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Term
| What are the 4 sutures of the skull? |
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Definition
1. Coronal
2. Sagittal
3. Squamosal
4. Lambdoidal |
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Term
| Where is the coronal suture located? |
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Definition
| between the frontal bone and the parietal bones |
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Term
| Where is the sagittal suture located? |
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Definition
| between the two parietal bones, just posterior to the coronal suture |
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Term
| Where is the squamosal suture located? |
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Definition
| between the temporal bones and the parietal bones |
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Term
| Where is the lambdoidal suture located? |
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Definition
| between the parietal bones and the occipital bone |
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Term
| What is the junction of the coronal and sagittal sutures called? |
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Definition
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Term
| What is the junction of the sagittal and lambdoidal sutures called? |
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Definition
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Term
| The frontal bone has a vertical portion and 2 __________ portions. |
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Definition
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Term
| What is the vertical portion of the frontal bone called? What does it form? |
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Definition
| frontal squama; the forehead and anterior part of the vault |
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Term
| The __________ portion of the frontal bone forms the orbital plates (roofs of the orbits), part of the roof of the nasal cavity, and the greater part of the anterior cranial fossa. |
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Definition
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Term
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Definition
| a thin, plate-like mass - as of bone |
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Term
| On each side of the MSP of the superior portion of the frontal squama is a rounded elevation called the ______ _________. |
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Definition
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Term
| What are the two arched ridges that correspond in position to the eyebrows? |
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Definition
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Term
| The smooth elevation between the superciliary arches is termed the ________. |
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Definition
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Term
| The midpoint of the frontonasal suture is termed the _____. |
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Definition
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Term
| What other cranial bones does the frontal bone articulated with? |
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Definition
| both parietals, sphenoid, and ethmoid |
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Term
| The orbital plates of the horizontal portion of the frontal bone are separated by a notch called the _________ notch. |
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Definition
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Term
| At the anterior edge of the ethmoidal notch is a small inferior projection of bone called the ______ _____, which is the superior-most component of the bony nasal septum. |
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Definition
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Term
| The _______ bone is a small, cube-shaped bone that consists of a horizontal plate, a vertical plate, and two light, spongy lateral masses called labyrinths. |
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Definition
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Term
| Situated between the orbits, the _______ bone forms part of the anterior cranial fossa, the nasal cavity, the orbital walls, and the bony nasal septum. |
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Definition
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Term
| A hollow or depressed area: |
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Definition
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Term
| What is the horizontal portion of the ethmoid bone called? |
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Definition
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Term
| The cribriform plate of the ethmoid bone has a thick, conical process called the ____ ____, which projects superiorly from its anterior midline and serves as the anterior attachment for the falx cerebri. |
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Definition
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Term
| The vertical portion of the ethmoid bone is called the ____________ plate. |
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Definition
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Term
| The perpendicular plate of the ethmoid bone - together with the nasal spine, form the superior portion of the ____ ______ of the nose. |
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Definition
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Term
| The lateral masses of the ethmoid bone (the labyrinths) contain ________ ______. |
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Definition
| ethmoidal sinuses (air cells) |
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Term
| The air cells of each side of the ethmoidal labyrinths are divided into three groups: |
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Definition
1. anterior air cells
2. middle air cells
3. posterior air cells |
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Term
| The walls of the ethmoidal labyrinths form a part of the medial walls of the orbits and form a part of the lateral walls of the _____ cavity. |
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Definition
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Term
| Projecting inferiorly from each medial wall of the ethmoidal labyrinths are two thin, scroll-shaped processes called the _______ and ______ ______ conchae. |
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Definition
superior nasal concha
middle nasal concha |
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Term
| Which bones of the cranium does the ethmoid bone articulate with? |
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Definition
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Term
| The two _______ bones are square and have a convex external surface and a concave internal surface. They make up a large portion of the sides of the cranium. |
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Definition
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Term
| These two bones make up the posterior portion of the cranial roof by their articulation with each other at the sagittal suture in the MSP. |
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Definition
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Term
| Each parietal bone has a prominent bulge called the parietal _________. It is located near the central portion of its external surface. |
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Definition
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Term
| What is the widest point of the head? |
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Definition
| From parietal eminence to parietal eminence. |
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Term
| What other cranial bones does each parietal bone articulate with? |
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Definition
1. Frontal
2. Temporal
3. Occipital
4. Sphenoid
5. Opposite Parietal |
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Term
| The ________ bone is an irregularly wedge-shaped bone that resembles a bat with its wings extended. It is situated in the base of the cranium anterior to the temporal bones and basilar part of the occipital bone. |
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Definition
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Term
| The ________ bone consists of a body, two lesser wings and two greater wings, which project laterally from the sides of the body, and two pterygoid processes, which project inferiorly from each side of the inferior surface of the body. |
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Definition
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Term
| The body of the sphenoid bone contains the two sphenoidal _______, which are incompletely separated by a median septum. |
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Definition
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Term
| The anterior surface of the body of the sphenoid bone forms the posterior bony wall of the ______ cavity. |
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Definition
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Term
| The superior surface of the sphenoid bone presents a deep depression called the _____ ______ and contains a gland called the _______ gland. |
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Definition
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Term
| The sella turcica is bound anteriorly by the ________ _____ and posteriorly by the _______ _____, which bears the posterior clinoid processes. |
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Definition
anteriorly: tuberculum sellae
posteriorly: dorsum sellae |
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Term
| The _____ supports the pons. |
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Definition
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Term
| On either side of the sella turcica is a groove called the ______ sulcus, in which the internal carotid artery and cavernous sinus lie. |
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Definition
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Term
| The _____ groove extends across the anterior portion of the tuberculum sellae. |
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Definition
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Term
| The _______ wings of the sphenoid bone form the posteromedial portion of the roofs of the orbits, the posterior portion of the anterior cranial fossa, the upper margin of the superior orbital fissures, and the optic canals. |
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Definition
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Term
| The _______ wings of the sphenoid bone form a part of the middle cranial fossa, the posterolateral walls of the orbits, the lower margin of the superior orbital sulci, and the greater part of the posterior margin of the inferior orbital sulci. |
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Definition
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Term
| What pairs of foramina are situated on the greater wings of the sphenoid? |
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Definition
| rotundum, ovale, and spinosum |
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Term
| The _________ processes of the sphenoid articulate with the palantine bones anteriorly and with the wings of the vomer, where they enter into the formation of the nasal cavity. |
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Definition
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Term
| The ________ bone articulates with each of the other seven bones of the cranium. |
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Definition
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Term
| The occipital bone consists of four parts: the, ______ two occipital ______, and the ______ portion. |
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Definition
| 1. squama, 2., & 3. occipital condyles, 4. basilar portion |
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Term
| The inferior portion of the medulla oblongata passes through the ______ _______ of the occipital bone as it exits the cranial cavity and joins the spinal cord. |
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Definition
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Term
| What are the only bony articulations between the skull and the neck? |
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Definition
| The occipitoatlantal joints |
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Term
| The anterior portion of the occipital bone contains a deep notch that forms a part of the _______ foramen. |
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Definition
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Term
| The jugular foramen is an important large opening in the skull for two reasons: |
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Definition
1. allows blood to drain from the brain via the internal jugular vein
2. it lets 3 cranial nerves pass through it |
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Term
| The __________ bone articulates with the two parietals, the two temporals, and the sphenoid of the cranium. It also articulates with the first cervical vertebra. |
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Definition
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Term
| Each ______ bone consists of a squamous portion, a tympanic portion, a styloid process, a zygomatic process, and a petromastoid portion. |
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Definition
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Term
| The mandibular fossa recieves the condyle of the mandible to form the ___. |
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Definition
| TMJ (temporomandibular joint) |
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Term
| (True/False) The mastoid process is larger in males than in females. |
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Definition
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Term
| The thickest, densest bone in the cranium is the _______ ______ of the temporal bone. |
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Definition
| petrous portion (petrous pyramid) |
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Term
| The petrous portion of the temporal bone contains the organs of _______ and _______. |
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Definition
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Term
| The upper border of the petrous portion of the temporal bone (AKA petrous ridge) lies approximately at the level of what external radiography landmark? |
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Definition
| Top of Ear Attachment (TEA) |
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Term
| The ________ bone articulates with the parietal, occipital, and sphenoid bones of the cranium. |
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Definition
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Term
| Petrous portion + mastoid portion = |
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Definition
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