Anterior to external acoustic meatus and inferior to

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Anterior to external acoustic meatus and inferior to zygomatic archFrontal (Coronal) SutureBetween parietal bone and frontal bone Lambdoid SutureBetween Occipital and Parietal boneExternal Occipital Protuberance (EP)At the junction of frontal, parietal, sphenoid, and temporal bonesPterion (P)PosteriorLambdoid SutureTogether form the landmark, LambdaSagittal Suture External occipital protuberance (EP)Bony protrusion with several muscles of the back attach, including trap.Mastoid ProcessProjection from the temporal bones on posterior view SuperiorBregmaFormed where frontal bone joins the 2 parietal bones (anterior)LambdaFormed where lambdoid and sagittal suture meets (posterior) Anterior viewLateralPosteriorInferiorSuperior Frontal NasalParietalbasicranium NeurocraniumParietalFrontalTemporalOccipitalCalvaria (skull cap)ZygomaticMaxillaOccipitalParietalNasalZygomaticMandibleTemporalLacrimalSphenoidSphenoidEthmoidParietalZygomaticVomerTemporal MaxillaMaxillaOccipitalPalatineMandible Mandible Vomer
Sphenoid Single midline boneArticulations with frontal, parietal, temporal, occipital, and ethmoid bone (anteriorly) Greater and lesser wingSella turcica –shape of a butterfly, wedged in among several bones, “keystone” of the base of the skullOther foraminas- superior orbital fissure, foramen rotundum, foramen ovale, foramen spinosum, foramen laerum, optic canal and pterygoid canal. Pterygoid process w/ lateral and medial pterygoid platesHamulus – medial pterygoid, prominent hook-like pro3jectionTemporal Articulateswith occipital, parietal, greater wing of sphenoid and zygomatic.Stylomastoid foramen is b/w styloid and mastoid processesPetrotympanic fissure allows a small nerve (chorda tympani) to pass downwardMandibular fossa (TMJ)can be seen Squamous position contributes to middle cranial fossaMiddle meningeal artery passes up from the small foramen spinosum on the floor of cranial cavityPetrous portion provide passage for internal carotid artery (carotid canal) and separates the middle and posterior cranial fossae.Superior petrosal venous sinus leaves a groove on its surface and internal acoustic meatus is on its posterior sideSigmoid Venus sinus leads to the jugular foramenNevers exiting on the anterior: greater and lesser petrosal nerves Endocranial cavitySeen by removing calvaria and the brain, covered by duraLesser wing of sphenoid separates the anterior and middle cranial fossae Anteriorcranial fossa: frontal lobes of brainMiddle cranial fossa:posterior to lesser wing of sphenoid bone, holds the temporal lobes of the brainPosterior cranial fossa: posterior to petrous ridge of temporal bone; houses the brainstem and cerebellum Orbital CavityBones: frontal, lesser and greater wing of sphenoid, zygomatic, maxilla, palatine, ethmoid, and lacrimalSuperior and inferior orbital fissuresOptic canal is the circular opening through the sphenoid conveying

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Term
Fall
Professor
Thierry Bacro
Tags
Anatomy, Internal carotid artery, Accessory nerve, Facial nerve, Internal jugular vein

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