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30 Cards in this Set
- Front
- Back
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Orbit contains:
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eyeball and extraocular muscles
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Major skull cavities
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cranial cavity (holds brain)
orbit (eyeball& extraocular muscles) ethmoid sinus nasal cavity maxillary sinus oral cavity |
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How many bones in the skull?
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22
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How many bones are in contact with the meninges?
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8 bones (frontal, parietal)
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calvaria
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skullcap
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fontanel
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soft patches on skull that accommodates brain growth (newborns have anterior and posterior)
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3 basins of the cranial floor / base
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1. anterior fossa (frontal lobe)
2. middle fossa (temporal lobes) 3. posterior fossa (occipital lobes) |
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What artery goes through the supraorbital foramen?
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Supraorbital artery (the only internal artery off of the internal carotid)
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What is the biggest bone of the skill?
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Parietal - provides the most protection for cerebrum
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petrous portion of temporal bone
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houses middle and inner ear cavities
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Fracture in what area of temporal bone causes facial paralysis and why?
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internal auditory meatus of the petrous portion (temporal bone)
this is the opening for CN VII (vestibulococholear nerve) and VIII |
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carotid canal
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passage for internal carodid artery supplying the brain
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jugular foramen
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irregular opening between temporal and occipital bones
passageway for drainage of blood from brain to internal jugular vein |
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foramen magnum
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holds spinal cord
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hypoglossal canal
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transmits hypoglossal nerve (CN XII)
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nuchal ligament
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required for running, attach to the external occipital protuberance for nuchal ligament
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what's housed in the sphenoid bone?
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pituitary gland and optic nerves
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sella turcica
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contains deep pit called hypophyseal fossa
houses pituitary gland |
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what houses the pituitary gland
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sella turcica - body of the sphenoid bone
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optic foramen
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contains optic nerve and ophthalmic artery
lesser wing of sphenoid bone |
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greater sphenoid wing
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foramen rotundum & ovale for trigeminal nerve
foramen spinosum for meningeal artery |
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sphenoid sinus
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contains internal carotid and crainial nerve VI
on lateral walls: CN III, IV, and V |
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infections of sphenoid sinus
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can be deadly! 50% will die
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what forms the lateral walls and root of nasal cavity?
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ethmoid bone
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ethmoid bone contains:
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1. cribriform plate
2. crista galli |
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perpendicular plate of ethmoid bone
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forms part of nasal septum
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what happens if the cribriform plate is fractured?
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anosmia (lack of smell)
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alveolar processes
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bony points between teeth (alveolar sockets hold the teeth)
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infraorbital foramen
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passage of sensory nerves to check (CN V trigeminal)
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paranasal sinuses
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frontal sinus
ethmoid sinus maxillary sinus sphenoid sinus |
