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Skull
Skull Anatomy
| Question | Answer |
|---|---|
| List the eight cranial bones. | R/L parietal bones, Frontal bone, Occipital bone, R/L temporal bones, sphenoid, ethmoid |
| List the 14 facial bones. | R/L nasal, R/L lacrimal, R/L maxillary, R/L palantine, mandible, vomver, R/L nasal conchae, R/L zygomatic |
| List the four main sutures in the skull. | coronal, sagittal, lambdeoidal, squamosal |
| Junction of the parietal bone, squamosal suture and the greater wing of the sphenoid. | Pterion |
| Junction of coronal and sagittal sutures. | Bregma |
| What are the three regions of the base of the skull (cranial floor)? | anterior, middle, posterior cranial fossas |
| What bone is the cribiform plate located on? | Ethmoid bone |
| Lambda | Junction of sagittal and lambdoidal suture |
| What bone is the sella turcica located on? | Sphenoid bone |
| Asterion | Junction of the occipital bone, parietal bone and mastoid portion of the temporal bone. |
| Perpendicular plate is located on the ______. | ethmoid bone |
| What bone contains the pterygoid processes? | Sphenoid bone |
| Supraorbital forament | Hole located on frontal bone; above the orbits |
| Raised rounded portion found on frontal bone. | Frontal eminence |
| Raised portion located between the cribiform plate and found on the ethmoid bone. | cristi gali |
| AKA eyebrow | supracilliary arches |
| Forament rotendum | foramen located on sphenoid bone |
| What are the two types of cranial bones? | calvaria and floor |
| Which bones are located in the calvaria? | 4 bones -frontal, occipital, R/L parietal |
| Which bones are located in the floor? | 4 - ethmoid, sphenoid, occipital, R/L temporal |
| How many total bones are located in the skull? | 22 |
| What are the six aspects of the skull? | frontal (anterior), lateral (2), posterior (occipital), vertex (crown), basal (inferior surface) |
| Which suture is the only paired one? | squamosal suture |
| What are the four foramen found in the sphenoid bone? | foramen rotundem, foramen ovale, foramen lacerum, foramen spinosum |
| What are the most dense portions of the skull? | petrous portions |
| Largest foramen in the skull. | foramen magnum |
| Soft spongy tissue between compact bone. | diploe |
| Areas of incomplete ossification in infant skulls. | Fontanels |
| A typical skull is termed ________. | Mesocephalic |
| Be able to locate the following: glabella, inner canthus, outer canthus, nasion, infraorbital margin, acantion, gonion, mental point, EAM, Auricular point, Tope of ear attachment | Look at diagram |
| Smooth elevation between the superciliary carches is the ________. | glabella |
| Rounded elevation on the frontal bone. | frontal eminence |
| Opening for nerves and blood vessels found in the center of the supraorbital margin. | supraorbital foramen |
| Nasion | midpoint of the frontonasal suture |
| Horizontal portion of the ethmoid bone | cribiform plate |
| Thick conical process arising from the cribiform plate. | cristi gali |
| Perpendicular plate | vertical portion of the ethmoid bone |
| Air cells in ethmoid | contained within the labyrinths; aka ethmoidal sinuses |
| Scroll shaped processes projecting inferiorly from labyrinths | superior and inferior nasal conchae |
| What bones does the ethmoid bone articulate with? | frontal and sphenoid |
| What bones does the frontal bone articulate with? | r/l parietal, sphenoid, and ethmoid bones |
| How many parietal bones are there? | two |
| Prominent bulge on parietal bone | parietal eminence |
| Which bones do the parietal bones articulate with? | frontal, temporal, occipital, sphenoid, opposite parietal |
| Irregularly wedged shaped bone that resembles a bat with wings. | Sphenoid bone |
| The sphenoid bone consists of : | two greater wings, two lesser wings, body, two pterygoid processes |
| Superior surface of sphenoid contains a deep depression called the ______. | sella turcica |
| Which portion of the skull is measured due to it being the widest point of the head? | parietal eminence |
| What gland sits in the sella turcica? | pituitary gland |
| The sella turcica is bound anteriorly by the ________ and posteriorly by the _____. | tuberculum sellae and dorsum sellae |
| Where is the posterior clinoid processes located? | Located on the dorsum sellae |
| Slanted area posterior and inferior to dorsum sellae. | clivus |
| The _____ _____ extends across the anterior portion of the tuberculum sellae. | optic groove |
| Opening of the optic canal. | optic foramen |
| Comes off of the lesser wings and tuberculum sellae. | anterior clinoid process |
| Bone located at the posteroinferior part of the skull. | occipital bone |
| Where is the pons supported? | In the clivus |
| What are the four parts of the occipital bones? | squama, two occipital condyles, basilar portion |
| Prominent process located between the squama and the foramen magnum externally. | external occipital protuberance |
| What is another term used instead of external occipital protuberance? | inion |
| The occipital condyles articulate with the ____. | atlas of the cervical spine |
| Found at the anterior ends of condyles and transmit the hypoglossal nerves. | hypoglossal canals |
| With what bones does the occipital bone articulate with? | r/l parietal, r/l temporal, sphenoid and atlas of c spine |
| Which portion of the temporal bones contains the organs of hearing and balance? | petromastoid portion |
| Thin upper portion of the temporal bone | squamous portion |
| The ________ process of the temporal bone articulates with the zygomatic bone of the face. | zygomatic process |
| The mandibular fossa receives the condyle of the mandible to form the ______. | TMJ; temporomandibular joint |
Created by:
sr4095
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