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68 Cards in this Set
- Front
- Back
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apex of orbital cavity - faces which way?
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posteriorly
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orbit is what shape?
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four sided pyramid which slants medially
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orbital cavity - roof
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-orbital plate of frontal bone
-lesser wing of sphenoid |
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orbital cavity - roof includes what fissure?
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superior orbital fissue
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orbital cavity - medial wall
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-lamina papyracea of ethmoid
-lacrimal bone |
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orbital cavity - floor
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-orbital part of maxilla
-palatine -zygomatic (small part) |
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orbital cavity - lateral wall
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-frontal process of zygomatic
-greater wing of spehnoid -frontal (small part) |
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where do "blow out fractures" occur in the orbital cavity, and why?
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floor and medial wall
-they are thin |
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bubar fascia - also known as?
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tenon's capsule
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bubar fascia - attaches to:
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sclera
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bubar fascia - function
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-facilitates eye movements
-separates eyeball from other orbital contents -prolonged over the tendons of the extraocular mm |
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conjunctiva - lines what?
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inner aspect of eyelids and goes back into the eyeball
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conjunctiva - it's sac opens up to the surface via:
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palperbral fissure (opening between eyelids)
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what part of eyes accounts for "bloodshot" eyes, and why?
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conjunctiva
-because it is very vascular, and the vessels are dilated |
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eyelids - moveable ____ of skin that contain ____ and a dense connective tissue layer, the _____.
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-folds
-glands -tarsal plate |
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tarsal glands secrete what, and what does it do?
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-waxy film
-slows evaporation of tears |
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orbicularis oculi - innervation?
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CN7
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levator palpabrae - innervation?
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CN3
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which muscles are found in the upper lid of eye? which ones are made of smooth muscle?
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-orbicularis oris
-levator palpabrae superioris -superior tarsal m (smooth m) |
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superior tarsal m - innervation?
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ANS
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which gland is associated with eyelashes
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ciliary gland
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what produces a "sty"?
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ciliary gland inflamation
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what is responsible for production of tears
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lacrimal apparatus
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lacrimal gland - what kind of gland?
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exocrine
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lacrimal gland produces:
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tears
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lacrimal gland recieves secretomotor input from:
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pterygopalatine ganglion
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pterygopalatine ganglion - recieves preganglionics from:
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CN7
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tears drain from lacrimal gland drain into _____ and move to _____.
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conjunctival sac
-medial angle of eye |
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lacrimal puncta - path of tears
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lacrimal canalicula --> lacrimal sac --> lacrimal puncta
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lacrimal puncta - location?
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one at the medial end of each eyelid
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path of tears from lacrimal sac into nose:
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lacrimal sac --> nasolacrimal duct --> inferior meatus of nasal cavity
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four recti - origin
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edges of optic canal
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four recti - form a cuff around _____.
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-optic n
-CN11 -CN3 |
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superior oblique m of eye - origin
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sphenoid
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superior oblique m of eye - passes thru _____ and inserts on _____.
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-trochlea
-sclera |
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inferior oblique m of eye - origin
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anterior margin of the floor of orbit
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inferior oblique m of the eye - insertion
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sclera, under lateral rectus
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CN3 - innervates what extraocular muscles?
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-medial rectus
-superior rectus -inferior rectus -inferior oblique |
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CN11 - innervates what extraocular muscles?
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lateral recus
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CN9 - innervates what extraocular muscles?
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superior oblique
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medial rectus m - function
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adducts (gaze)
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lateral rectus m - function
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abducts
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superior rectus m - function
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elevates abducted
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inferior rectus m - function
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depresses abducted
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superior oblique m of the eye - function
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depresses adducted
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inferior oblique m of the eye - function
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elevates adducted
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optic n (CN2) carries visual impulses from the neural part of the:
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retina
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optic n is really a ____ of the brain
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"tract"
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these nerves innervate the extraocular mm (generally)
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CN3
CN9 CN11 |
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path of oculomotor n:
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oculomotor n --> parasymathetic fibers --> ciliary ganglion --> constrictor pupillae and ciliary m.
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ciclary m - funciton
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change the shape of lense
-focus image |
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CN5I/opthamalic division - supplies PURELY sensory to what?
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-conjuctiva
-cornea -upper eyelid -nose -scalp -frontal, spehnoidal, and ehtoidal air sinuses |
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CN5I - branches
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-frontal n
-nasociliary n -lacrimal n |
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largest nerve of the orbit?
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facial n
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frontal nerves - divisions
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-supratrochlear n
-supraorbital n |
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dialator pupili - innervation
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nasociliary n
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superior tarsal m - innercation
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nasociliary n
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nasociliary n - damage results in?
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-ptosis
-pupil constriction |
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lacrimal n - function?
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sensory to upper eyelid
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lacrimal n - s, m, b, p?
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-sensory
-parasympathetic |
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parasympathetic fibers of lacrimal gland are ______ to the ______ gland
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secretomotor
-lacrimal gland |
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ANS is divided into _____ and _____.
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sympathetic division
parasympathetic division |
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sympathetic - reaction?
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flight or fight
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parasympathetic - reaction?
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vegitative
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another name for sympathetic division of ANS
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thoracolumbar division
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sympathetic chain of ganglia - function?
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elevator system by which symptathetic influences extend above and below thoracolumbar levels
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another name for parasympathetic division of ANS
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craniosacral division
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parasympathetic ganglia associated with cranial nn:
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-ciliary (CN3)
-pterygopalatine (CN7) -submandibular (CN7) -otic (CN9) |
