Anatomy Exam 2 - Orbit

Front 1

bones of the orbit

Back 1

-maxillary
-frontal
-zygomatic
-ethmoid
-lacrimal
-sphenoid
-palatine

Front 2

superior wall of the orbit formed by:

Back 2

-the orbital part of the frontal(mainly)
-lesser wing of sphenoid

Front 3

location and contents of lacrimal fossa

Back 3

-superolateral part of orbital plate of frontal bone
-lacrimal gland in it

Front 4

medial wall of the orbit formed by:

Back 4

-ethmoid (mainly)
-frontal
-lacrimal
-sphenoid

Front 5

medial wall contains:

Back 5

fossa for lacrimal sac and nasolacrimal duct

Front 6

floor of orbit formed by:

Back 6

-maxilla (mainly)
-zygomatic
-palatine

Front 7

lateral wall of orbit formed by:

Back 7

-zygomatic
-greater wing of the sphenoid

Front 8

apex of the orbit location

Back 8

at the optic canal in the lesser wing of sphenoid

Front 9

protrusion of the eyeball

Back 9

exophthalmos

Front 10

connective tissue plates, form the skeleton of the lids

Back 10

tarsal plates

Front 11

tarsal glands

Back 11

-embedded in tarsal plates
-secrete lipid material to lubricate edges of lids

Front 12

ciliary glands

Back 12

large sebaceous glands of the eyelids

Front 13

medial palpebral ligament

Back 13

origin and insertion of the orbicularis oculi muscle
-connect tarsal plates to medial margin of the orbit

Front 14

sebceous gland

Back 14

keep cornea moist

Front 15

lacrimal gland and lacrimal ducts

Back 15

-secrete lacrimal fluid
-superolateral part of the orbit
-ducts (8-12) open in the supeiro conjuctival fornix

Front 16

lacrimal gland stimulated by:

Back 16

parasympathetic nerves of CN VII

Front 17

lacrimal lake

Back 17

collecting area of the tears at the medial angle of the eye

Front 18

lacrimal canaliculi

Back 18

lateral opening of the canaliculi are represented by the lacrimal papillae
-conveys tears from lacrimal lake to lacrimal sac

Front 19

lacrimal sac

Back 19

-dialated upper end of nasolacrimal duct

Front 20

nasolacrimal duct

Back 20

-extends inferiorly into the nose
-opens at the inferior meatus of the nasal cavity

Front 21

conjunctiva

Back 21

inside covering of the eyelid and eyeball

Front 22

conjunctival fornix

Back 22

-represents lines of reflection of the conjunctiva from the eyelid to the eyeball
-superior and inferior fornix

Front 23

recti muscles originate from and insert into

Back 23

originate - common tendinous ring
insertion - sclera of the eyeball

Front 24

extraocular muscles innervated by CN III

Back 24

-superior rectus
-medial rectus
-inferior rectus
-inferior oblique
-levator palpebrae superioris

Front 25

extraocular muscles innervated by nerves other than CN III

Back 25

superior oblique - CN IV
lateral rectus - CN VI

Front 26

action of superior rectus m

Back 26

rotate pupil superiorly and medially

Front 27

action of medial rectus

Back 27

rotate pupils medially

Front 28

action of lateral rectus

Back 28

rotate pupils laterally

Front 29

action of inferior rectus

Back 29

rotate pupils inferiorly and medially

Front 30

action of superior oblique

Back 30

abducts, depresses and rotates pupils laterally

Front 31

inferior oblique action

Back 31

abducts, elevates and rotates pupils laterally

Front 32

levator palpebrae superioris action

Back 32

elevates superior eyelid

Front 33

optic nerve enters orbit through:

Back 33

optic canal

Front 34

terminal branches of the opthalmic division of CN V

Back 34

-nasociliary
-frontal
-lacrimal

Front 35

three terminal branches of opthalmic enter the orbit by:

Back 35

passing through the superior orbital fissure

Front 36

ophthalmic division of CN V supply

Back 36

sensory innervation to the anterior orbit (lacrimal gland and eyelids), face and scalp

Front 37

largest branch of the opthalmic division of CN V

Back 37

frontal n

Front 38

frontal n branches

Back 38

-supraorbital
-supratrochlear

Front 39

smallest branch of the opthalmic division of CN V

Back 39

lacrimal n

Front 40

lacrimal n supplies

Back 40

sensory innervation to the lacrimal gland

Front 41

nasociliary n supplies

Back 41

sensory branches to eyeball via:
-long ciliary (w/out entering ciliary ganglion)
-short ciliary (goes thru ciliary ganglion and picks up postganglionic parasympathetic fibers)

Front 42

branches of the nasociliary

Back 42

-posterior ethmoidal
-anterior ethmoidal
-infratrochlear

Front 43

motor nerve to all muscles of the orbit except lateral rectus and superior oblique

Back 43

oculomotor n

Front 44

nerve that carries preganglionic parasympathetic fibers for the the smooth muscles of the eyeball into the orbit

Back 44

oculomotor

Front 45

in the orbit, all preganglionic parasympathetic fibers leave CN III via

Back 45

its motor root

Front 46

motor root of CN III carries preganglionic parasympathetic fibers to

Back 46

ciliary ganglion

Front 47

ciliary ganglion location

Back 47

in the orbit along the posterolateral side of the optic nerve

Front 48

ciliary ganglion contain

Back 48

cell bodies of postganglionic parasympathetic neurons
-where preganglionic fibers terminate and postganglionic fibers begin

Front 49

opthalmic artery

Back 49

enters the orbit through the optic canal

Front 50

branches of the opthalmic artery

Back 50

supraorbital
supatrochlear
lacrimal
the central artery of the retina

Front 51

venous drainage of the eye via:

Back 51

superior opthalmic vein
inferior opthalmic vein