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Flashcards in The Trigeminal Nerve Deck (62)
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1

trigeminal nerve:

the nerve of the ___

emerges from the side of the ___ & leaves the brainstem in two separate bundles (2)

first branchial arch

pons
large sensory root
small motor root

2

trigeminal nerve:

after leaving the brainstem, the two roots enter the ___ (___) in the ___ mater

the nerve spread out forming the ___ (___, ___) ganglion, which contains the (sensory/motor) neuron cell bodies (___ neurons)

trigeminal cave (Meckel's cave)
dura

trigeminal (semilunar, Gasserian)
sensory
pseudounipolar

3

trigeminal nerve:

peripheral processes of the cells in the trigeminal ganglion give rise to three divisions of the trigeminal nerve:
- ___ (purely sensory)
- ___ (purely sensory)
- ___ (sensory & motor)

opthalmic
maxillary
mandibular

4

trigeminal nerve:

has no (sympathetic/parasympathetic) component of its own, but branches of V are used as carriers for (sympathetic/parasympathetic) fibers from three cranial nerves (3)

parasympathetic
parasympathetic
III, VII, & IX

5

ophthalmic division of the trigeminal nerve:

continues anteriorly in the lateral wall of the ___ sinus & enters the orbit through the ___ fissure

before entering the orbit, it divides into three branches (3)

cavernous
superoir orbital

frontal
lacrimal
nasociliary

6

ophthalmic division of the trigeminal nerve:
frontal branch:

most (superior/inferior) structure in the orbit

divides into two branches:
- ___ branch: smaller, more medial branch, runs superior to the trochlea (pulley) of the superior oblique eye muscle
- ___ branch: larger, lateral branch, passes through the supraorbital notch or foramen

both nerves supply the ___ as far as the vertex of the skull & both also send branches to the ___

superior

- supratrochlear
- supraorbital

scalp
upper eyelid

7

ophthalmic division of the trigeminal nerve:
lacrimal branch:

passes along the upper edge of the ___ muscle

passes through the ___ gland giving it (sensory/motor) twigs & ends in palpebral branches to the ___

lateral rectus eye muscle

lacrimal
sensory
upper eyelid

8

ophthalmic division of the trigeminal nerve:
lacrimal branch:

while traveling through the orbit, it receives (preganglionic/postganglionic) (sympathetic/postsympathetic) fibers from the ___ ganglion through the ___ branch of the ___ nerve

postganglionic
parasympathetic
pterygopalatine
zygomatic
maxillary (V2)

9

ophthalmic division of the trigeminal nerve:
nasociliary branch:

proceeds anteromedially b/n the ___ muscle & the ___ nerve following the course of the ___ artery

gives off four branches (4)

superior rectus
optic
ophthalmic

long ciliary
posterior ethmoidal
anterior ethmoidal
infratrochlear

10

ophthalmic division of the trigeminal nerve:
nasociliary branch:
long ciliary branch:

major (sensory/motor) nerve to the ___ & notably the ___

sensory
eyeball
cornea

11

ophthalmic division of the trigeminal nerve:
nasociliary branch:
posterior ethmoidal branch:

enters the posterior ethmoidal ___

(sensory/motor) fibers to the ___ sinuses & the posterior ethmoidal ___ cells

foramen

sensory
sphenoidal air
air

12

ophthalmic division of the trigeminal nerve:
nasociliary branch:
anterior ethmoidal branch (larger):

enters the anterior ethmoidal ___

sends (sensory/motor) fibers to the middle & anterior ethmoidal ___ cells

next enters the ___ at the side of the ___ of the ethmoid & sends (sensory/motor) fibers to the ___

foramen

air

cranial cavity
cribriform plate
sensory
meninges

13

ophthalmic division of the trigeminal nerve:
nasociliary branch:
anterior ethmoidal branch (larger):

after entering the cranial cavity, it enters the ___ through the ___

within nose gives off (sensory/motor) fibers to the anterior part of the ___ & anterior parts of the (medial/lateral) walls

leaves the nasal cavity as the ___ branch, which supplies the skin of the lower half of the ___

nasal cavity
nasal slit

sensory
nasal septum
lateral

external nasal
nose

14

ophthalmic division of the trigeminal nerve:
nasociliary branch:
infratrochlear branch:

passes forward beneath the ___

(sensory/motor) to the side of the ___ & the medial corner of the ___

trochlea

sensory
nose
upper eyelid

15

ophthalmic division of the trigeminal nerve:
nasociliary branch:

immediately after the nasociliary nerve enters the orbit, it is connected to the ___ ganglion by a small twig called the ___ root of the ___ ganglion

ciliary

sensory root of the ciliary ganglion

16

ophthalmic division of the trigeminal nerve:
nasociliary branch:

the ciliary ganglion is said to have three roots:
- the ___ root which connects it to the nasociliray nerve
- the ___ root which conveys postganglionic sympathetic fibers through it
- the ___ (___) root which contains preganglionic parasympathetic fibers which synapse in the ganglion

sensory

sympathetic

motor (parasympathetic)

17

maxillary division of the trigeminal nerve:

___ (sensory/motor) fibers

enters the lateral wall of the ___ sinus & passes through the ___ to enter the ___ fossa

within the fossa, it is connected to the ___ ganglion & nerve of the ___ for exchange of fibers

general sensory fibers

cavernous
foramen rotundum
pterygopalatine

pterygopalatine
pterygoid canal

18

maxillary division of the trigeminal nerve:
pterygopalatine ganglion:

(preganglionic/postganglionic) (sympathetic/parasympathetic) neurons

postganglionic
parasympathetic

19

maxillary division of the trigeminal nerve:
nerve of the pterygoid canal:

greater petrosal nerve - ___ & (pre/post-ganglionic) (symp/parasymp) fibers from the ___ nerve

deep petrosal nerve - (pre/post-ganglionic) (symp/parasymp) fibers from the ___ plexus

taste
preganglionic parasympathetic
facial

postganglionic sympathetic
internal carotid

20

maxillary division of the trigeminal nerve:

after exchanging fibers, it proceeds through the ___ fissure to the floor of the orbit becoming the ___ nerve

it passes along the ___ groove, canal, & foramen & finally emerges on the ___

inferior orbital
infraorbital

infraorbital
face

21

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition (3)

greater & lesser palatine nerves

posterior nasal branches & nasopalatine nerves

pharyngeal branch

22

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
greater & lesser palatine nerves:

descend through the ___ & emerge through the ___ foramina to reach the hard & soft ___

palatine canals
greater & lesser palatine
palates of the mouth

23

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
greater & lesser palatine nerves:

general sensory fibers from ___

postganglionic parasympathetic fibers from the ___ ganglion

taste fibers from the ___ branch of the ___ nerve for taste buds in the roof of the mouth

cells of origin of the taste fibers are in the ___ ganglion of the ___ nerve

postganglionic sympathetic fibers from the ___ nerve

maxillary nerve (V2)

pterygopalatine

greater petrosal
facial

geniculate
facial

deep petrosal

24

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
posterior nasal branches & nasopalatine nerves:

upper posterior nasal & nasopalatine nerves - pass into the nasal cavity via the ___ foramen

lower posterior nasal nerves - originate from the ___ nerve as it descends in the ___; they pass through small bony foramina to enter the ___

sphenopalatine

greater palatine
greater palatine canal
nasal cavity

25

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
posterior nasal branches & nasopalatine nerves:

posterior nasal branches supply the posterior part of the ___ & posterior walls of the ___

the nasopalatine nerve proceeds antero-inferiorly through the ___ (supplying it) & enters the mouth through the ___ foramen behind the ___ teeth to supply a small anterior portion of the ___ palate

nasal septum
nasal cavity

nasal septum
incisive
upper incisor
hard

26

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
posterior nasal branches & nasopalatine nerves:

general sensory fibers from ___

postganglionic parasympathetic fibers from the ___ ganglion

postganglionic sympathetic fibers from the ___ nerve

maxillary nerve (V2)

pterygopalatine

deep petrosal

27

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
pharyngeal branch:

passes posteriorly from the ___ ganglion & leaves the ___ fossa through the ___

supplies the ___ & glands of the ___

pterygopalatine
pterygopalatine
palatovaginal (pharyngeal) canal

mucosa
nasopharynx

28

maxillary division of the trigeminal nerve:
branches arising from the pterygopalatine ganglion & fiber composition:
pharyngeal branch:

general sensory fibers from ___

postganglionic parasympathetic fibers from the ___ ganglion

postganglionic sympathetic fibers from the ___ nerve

maxillary nerve (V2)

pterygopalatine

deep petrosal

29

maxillary division of the trigeminal nerve:
branches arising from the main trunk of the maxillary nerve & infraorbital nerve:
orbital branches:

small branches passing through the ___ fissure & contribute to the supply of the ___

they then contribute to the supply of the ___, ___, & ___ air sinuses

inferior orbital
orbital wall

ethmoidal
sphenoidal
frontal

30

maxillary division of the trigeminal nerve:
branches arising from the main trunk of the maxillary nerve & infraorbital nerve:
fiber types of the orbital branches:

general sensory fibers from ___

postganglionic parasympathetic fibers from the ___ ganglion

postganglionic sympathetic fibers from the ___ nerve

maxillary nerve (V2)

pterygopalatine

deep petrosal

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