Term
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Definition
| (1) Cranial Vault or Calvaria (2) Cranial Floor or base |
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Term
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Definition
| forms the superior, lateral and posterior walls of the skull |
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Term
| Cranial Floor (Base) and 3 distinct concavities |
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Definition
| forms skull bottom. (1) Anterior, (2) Middle, and (3) Posterior Fossae; in which the brain sits completely enclosed by the cranial by the cranial vault |
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Term
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Definition
| Anterior Portion of cranium; forehead, superior part of orbit, and floor of anterior cranial fossa |
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Term
| Supraorbital foramen (notch) |
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Definition
| opening above each orbit allowing blood vessels and nerves to pass |
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Definition
| smooth area between the eyes |
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Definition
| inferior to parietal bone on lateral skull. 4 major regions: 1) squamous 2) tympanic 3) mastoid 4) petrous |
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Definition
| abuts the parietals, relatively flat and vertical; 3 major features: 1) zygomatic process 2) mandibular fossa 3) squamous suture |
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Term
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Definition
| small ring of bone surrounding external ear opening; 2 features: 1) External acoustic meatus 2) stylomastoid foramen |
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| External Acoustic (auditory) meatus |
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Definition
| opening into the ear canal |
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Term
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Definition
| pointed spine on interior surface of external acoustic meatus; provides attachment for muscles of tongue, pharynx, and hyoid bone |
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Definition
| area posterior to ear (tympanic region); 2 features: 1) Mastoid Process 2) stylomastoid foramen |
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Definition
| lump behind earlobe; attachment site for muscles; filled with air cavities which can become infected (mastoiditis) |
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Definition
| tiny opening between the mastoid and styloid processes through which cranial nerve VII leaves the cranium |
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Definition
| lateral portion of skull base; seen in cranial floor like little mountain range separating the middle crainial fossa from the posterior fossa; houses middle and inner ear cavities |
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Definition
| Opening medial to the styloid process through which the internal jugular vein (drains from brain) and cranial nerves IX, X, and XI pass |
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Term
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Definition
| Opening medial to the syloid process through which the internal corotid artery passes into the cranial cavity |
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Term
| Internal acoustic (auditory) meatus |
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Definition
| opening on posterior aspect (petrous region) of temporal bone allowing passage of cranial nerves VII and VIII. |
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Term
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Definition
| jagged opening between the petrous temporal bone and the sphenoid providing passage for a number of small nerves and for the internal carotid artery to enter the middle cranial fossa (after passes through part of temp. bone) |
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Term
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Definition
| posterolateral to the frontal bone, forming sides of cranium; features 1) Sagittal suture 2) Coronal suture |
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Definition
| midline articulation point of the two parietal bones |
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Term
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Definition
| point of articulation of parietals with frontal bone |
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Term
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Definition
| most posterior bone of cranium; forms floor and back wall. Joins sphenoid bone anteriorly via its narrow basiooccipital region. |
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Definition
| articulation site of occipital bone and parietal bones |
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Term
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Definition
| large opening in base of occipital, which allows the spinal cord to join with the brain |
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Term
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Definition
| rounded projections lateral to the foramen magnum that articulate with the first cervical vertebra (atlas) |
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Term
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Definition
| opening medial and superior to the occipital condyle through which the hypoglossal nerve (cranial nerve XII) passes |
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Term
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Definition
| ridge that can be traced horizontally from from external occipital protuberance toward mastoid process. Provides superior limit of the neckneck and proivides attachment for some of the dep neck muscles |
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Term
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Definition
| deeper than superior nuchal line; provides attachement for some of the deep neck muscles. |
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Term
| External occipital protuberance |
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Definition
| large bump on back of head; attachement for nuchal ligament, which binds skull to so vertebral column |
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Term
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Definition
| ridge extending downward from external occipital protuberance toward foramen magnum |
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Term
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Definition
| irregularly shaped bone anterior to the sphenoid. Forms roof of the nasal cavity, upper nasal septum, and part of the medial orbit walls. |
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Definition
| vertical projection from ethmoid providing a point of attachment for the dura mater, helping to secure brain within skull |
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Term
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Definition
| bony plates lateral to the crista galli through which olfactory fibers pass to the brain from the nasal mucosa. The cribriform plates and the midline crista galli form the horizontal plate of the ethmoid bone. |
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Term
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Definition
| inferior projection of the ethmoid that forms the superior part of the nasal septum |
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Term
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Definition
| irregularly shaped and thin-walled bony regions flanking the perpendicular plate laterally. Their lateral surfaces (orbital plates) shape part of the medial orbit wall |
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Term
| Superior and Middle nasal conchae (turbinates) |
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Definition
| thin, delicately coiled plates of bone extending medially from the lateral masses of the ethmoid into the nasal cavity. Make air flow through nasal cavity more efficient (turbulance) and greatly increase the surface area of the mucosa that covers them. increases ability to warm and humidify air. |
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Definition
| Bat-shaped bone forming the anterior plateau of the middle cranial fossa across the width of the skull; Keystone of cranium as it articulates with with all other cranial bones. |
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Definition
| portions of the sphenoid seen exteriorly anterior to the temporal and forming a part of the eye orbits. |
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Term
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Definition
| jagged openings in orbits providing passage for cranial nerves III, IV, and VI to enter the orbit where they serve the eye. |
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Term
| Sella turcica (Turk's saddle) |
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Definition
| a saddle-shaped region in the sphenoid midline. The seat of this saddle is called the hypophyseal fossa. |
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Term
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Definition
| surrounds the pituitary gland (hypophysis); seat of Sella Turcica (Turk's Saddle) |
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Term
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Definition
| posterior margin of the Sella turcica |
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Term
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Definition
| raised anterior margin of the Sella turcica |
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Term
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Definition
| bat-shaped portions of the sphenoid anterior to the sella turcica |
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Definition
| openings in the bases of the lesser wings through which the optic nerves enter the orbits to serve the eyes |
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Definition
| opening lateral to the sella turcica providing passage for a branch of the fifth cranial nerve (not visible from inferior view of skull). |
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Term
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Definition
| opening posterior to the sella turcica that allows passage of a branch of the fifth cranial nerve. |
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Term
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Definition
| a narrow transverse groove that lies near the front of the superior surface of the body of the sphenoid bone, iscontinuous with the optic foramen, and houses the optic chiasma called also optic groove |
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Term
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Definition
| a jagged opening between the petrous temporal bone and the sphenoid providing passage for a number of small nerves and for the internal carotid artery to enter the middle cranial fossa. |
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Term
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Definition
| provides passage for an artery of the meninges (diameter of pencil lead) |
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Definition
| inferiorly directed trough-shaped projections from the junction of the body and the greater wings |
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Definition
| the lower jawbone, articulates with the temporal bones in the only freely movable joints of the skull |
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Definition
| horizontal portion; forms the chin |
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Term
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Definition
| vertical extension of the body on either side |
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Definition
| articulation point of the mandible with the mandibular fossa of the temporal bone |
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Term
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Definition
| jutting anterior portion of the ramus; site of muscle attachment |
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Term
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Definition
| prominent opening on the body (lateral to the midline) that transmits the mental blood vessels and nerve to the lower jaw. |
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Term
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Definition
| prominent foramen on the medial aspect of the mandibular ramus; find by opening lower jaw; permits passage of the nerve involved with tooth sensation (mandibular branch of cranial nerve V) and is the site where the dentist injects Novocain for lower teeth |
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Term
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Definition
| superior margin of mandible; contains sockets in which teeth lie |
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Term
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Definition
| anterior median depression indicating point of mandibular fusion. |
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Term
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Definition
| Extending upward and backward on either side from the lower part of the symphysis of the mandible is the mylohyoid line, which is the origin of the mylohyoid muscle |
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Term
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Definition
| u shaped arch between the condylar (mandibular condyle) and coronoid processes |
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Term
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Definition
| angle of mandible (jawbone) where ramus (vertical portion) and body (horizontal portion) meet |
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Term
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Definition
| for skull bones 1) maxillary 2) sphenoid 3) ethmoid and 4) frontal; contain sinuses (mucosa lined cavities) that lead into the nasal passages. Lighten facial bones and may act as resonance chambers for speech. |
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Term
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Definition
| largest of the sinuses found in skull |
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Term
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Definition
| sinsuses in sphenoid area |
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Definition
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Definition
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Term
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Definition
| small 'extra' bones in the skull, also called sutural bones |
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Term
| Structures composed of more than one bone |
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Definition
| 1) Orbit 2) Inferior orbital fissure 3) Hard palate 4) Nasal Septum |
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Term
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Definition
| two bones fused in a median suture; form the upper jawbone and part of the orbits. All facial bones join maxillae except mandible. Thus they are keystone bones of face. |
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Term
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Definition
| inferior and superior margin containing sockets (alveoli) in which teeth lie |
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Term
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Definition
| form the anterior hard palate (roof of mouth); hard extensions of the maxilla which meet dedially in the intermaxillary suture. |
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Term
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Definition
| opening under the orbit carring the infraorbital nerves and blood vessels to the nasal region. |
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Term
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Definition
| large bilateral opening located posterior to the central incisor tooth of the maxilla and piercing the hard palate; transmits the nasopalatine arteries and blood vessels |
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Term
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Definition
| fingernail-sized bones forming a part of the medial orbit walls between the maxilla and the ethmoid. Each pierced by a fossa. Smallest bones of skull. |
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Definition
| opening in the lacrimal bones, which serve as a passageway for tears; during life contains a lacrimal sac that collects tears and drains them into nasal cavity |
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Term
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Definition
| paired bones (horizonal plate and vertical plate "L" shape) posterior to the palatine processes; form posterior hard palate and part of the orbit; meet medially at the median palatine suture. |
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Definition
| nerve passage to the palate that pierces the horizontal plates of palatine bones |
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Definition
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Definition
| form the bridge of the nose and support cartilages that shape its lower portion |
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Definition
| largest of three conchae in nasal cavity (superior and middle are part of ethmoid bone) |
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Term
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Definition
| forms the inferior half of the nasal septum. Means "plowshare" - resemblance to blade of plow. (Superior portionof septum formed by the perpendicular plate of the ethmoid bon). |
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Term
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Definition
| Slender U-shaped bone between the chin and larynx. One of the few bones that does not articulare with any other. Suspended from the styloid processes of the skull, like a hammock. |
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Definition
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Definition
| separate two sagittal bones, anteriorly meets coronal suture and posteriorly meets lambdoid suture |
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Definition
| suture between frontal and parietall bones |
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Definition
| surrounds temportal plate touching occipital, parietal, and sphenoid bones |
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Definition
| between occipital, temporal, and parietal bones |
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Term
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Definition
| (TMJ) articulates temporal bone (inf. Surface of squamous region) of skull and mandible (condyle of mandible). Just anterior to ear. diarthrotic; gliding and uniaxial rotation, slight lateral movement, elevation , depression, protraction, and retraction of mandible |
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Definition
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Definition
| egg-shaped condyle of the mandible that articulates with the inferior surface of the squamous region of the temporal bone. |
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