cranial bones
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| the skull/bony skeleton of the head rests where? | superior end of the vertebral column
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| the skull is divided into what 2 main parts? | 8 cranial bones & 14 facial bones
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| what are the bones of the calvaria? | rt & lt pariatial,frontal,occipital
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| what are the bones of the floor? | rt & lt temporal,ethmoid,sphenoid
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| what forms the lateral walls of the cranium & part of the roof of the head? | 2 parietal bones
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| where is the widest portion of the entire skull? | b/w the parietal tubercles of the parietal bones
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| what forms the inferoposterior portion of the calvaria? | the occipital bone
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| what is the external surface of the occipital bone that presents a rounded part? | the squamous portion
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| the squamous portion forms most of the back of the head what is the part of the occipital bone superior to external occipital protuberance? | onion
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| what is the onion? | the prominent bump or protuberance at the inferoposterior portion of the skull
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| what forms the forehead & the superior part of each orbit? | frontal bone
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| the frontal bone consists of what 2 main parts? | squamous/verticalorbit/horizontal
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| the squamous/vertical forms what? | the forehead
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| the orbit/horizontal forms what? | the superior part of the orbit
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| the cranial bones are fused in an adult to form what? | a protective enclosure for the brain
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| in the squamous/vertical portion,what is the glabella | smooth prominence b/w the eyebrows just above the bridge of the nose.
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| what is the supraorbit groove (SOG) the slight | depression above each eyebrow
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| what is on each side of the squamous portion of the frontal bones above the supra orbital grooves? | frontal tuberosity(a larger prominence)
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| the orbital/horizontal portion consist of? | supraorbital margins(som,supercillary,glabella & frontal tuberosities
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| the frontal bone articulates with what four bones? | right & left parietal,sphenoid,& ethmoid
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| below the orbital plates lie facial bones & above the orbital plates is what? | anterior part of the floor of the brain case
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| each orbital plate is separated from the other by what? | ethmoidal notch
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| which bone fits into the ethnoidal notch? | the ethmoid bone
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| where is the nasal spine found at? | anterior end of the ethmoid notch
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| what is the large opening at the base of the occipital bone, which the spinal cord passes as it leave the brain | foramen magnum
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| the two lateral occipital condyles processes articulate with depression on the 1st cervical vertebra called? | atlas
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| what is the two part articulation b/w the skull & the cervical spine? | atlanto-occipital joint
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| the occipital articulate with what six bones | rt & Lt parietal,rt & Lt temporal,sphenoid & atlas
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| where is the temporal bone located at? | b/w the greater wing of the sphenoid bone(anterior) & the occpital bone(posteriorly)
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| what bone is extending anteriorly from the squamous portion of the temporal bone | zygomatic process
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| inferior to the zygomatic process & just anterior to the EAM is what? | temporomandibular fossa
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| what forms the temporomandibular joint? | temporomandibular fossa(which fits into)mandibular
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| what is inferior to the mandible & anterior to EAM is a slender bony projection called? | styloid process
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| each temporal bone is divided into 3 primary parts | squamous portion,mastoid portion,petrous portion
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| what is the upper border/ridge of the petrous pyramids commonly called? | petrous ridge or petrous apex
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| the petrous ridge of the pyramids corresponds to the level of what landmark? | TEA-top of the ear attachment
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| near the ctr of the petrous pyramid on the posterior surface just superior to the juglar foramen is an opening (orfice) the internal acoustic meatus what passes through here? | nerves for hearing & equalibrium
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| each temporal bone articulates with what 3 cranium bones? | partietal,occipital,& sphenoid
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| what contains the sphenoid sinus? | (the central portion of the sphenoid) the body
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| what is the central depression on the body of the sphenoid bone | sella turcica
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| the sella turcica partially surrounds & protects what? | pituitary gland
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| what is the posterior portion of the sella turcica called? | dorsum sellae
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| what is the shallow depression that begins on the back of dorsum sellae of the sphenoid bone to the occipital bone? | clivus
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| the clivus forms what? | base of the support for the pons
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| extending laterally from the body are 2 wings called | lesser wings & greater wings
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| lesser wings -what is located here? | anterior clinoid process
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| greater wings- what is located here? | foramen rotundum,formen ovale,foramen spinosum
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| where is the posterior clinoid process found? | on top of the dorsum sellae
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| what are the 4 process from the body of the sphenoid? | lateral pterygoid,medial pterygoid process,ptergoid hamuli
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| where is the ethmoid bone located at | lies below the floor of the cranium
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| on the ethmoid bone the small upper horizontal portion of the bone is called? | cribriform plate
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| the cribriform plate contains many small openings/foramina what passes through here | olfactory nerves passes through here
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| what is projecting down from the ethmoid bone? | perpendicular plate
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| the ethmoid bone articulate with what two cranial bones? | frontal & sphenoid
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