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Skull Anatomy

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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