1 - 3gem n. Flashcards by Blaire Watson

general considerations in studying trigeminal nerve

mixed nerve
largest of the CN
paired nerves
nerves anastomose

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pathway or where fibers originate?

posterior part of brain and spinal cord –> middle cranial fossa to form trigeminal ganglion

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other name for trigeminal ganglion

gasserian ganglion/semilunar

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where is the gasserian ganglion located

Meckel’s cavity in the middle cranial fossa (anterior to the pons)

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T/F anesthesia should affect the motor root of the trigeminal nerve

FALSE! it should NOT!

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motor root of the CNV originates in the ___ w/in the ____

motor nucleus within the pons and medulla oblongata

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structures innervated by the motor fibers of the trigeminal nerve supply

MoM - TIME
Mylohyoid
anterior belly of the digastric muscle
tensor tympani
tensor veli palatini

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Sensory or motor root: constitute the central processes of ganglion cells

sensory

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T/F sensory root supply the skin of the entire face and mucous membrane of entire cranial viscera and oral cavity except for the pharynx and posterior 1/3 of the tongue

True

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smallest of the 3 branches of CNV

ophthalmic nerve

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exit of v1

superior orbital fissure

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3 main divisions of v1

lacrimal (smallest)
frontal (largest)
nasocilliary

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innervates the lacrimal gland

lacrimal nerve

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innervates the adjacent conjunctiva

lacrimal nerve of v1

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frontal nerve of v1 branches into 2 before exiting the ___

supraorbital notch/foramen

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innervates the skin of upper eyelid

superior orbital nerve (of frontal nerve)

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innervates the lateral forehead

superior orbital nerve (of frontal nerve)

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innervates the anterior scalp region

superior orbital nerve (of frontal nerve)

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branches of frontal nerve

superior orbital

superior trochlear

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innervates the medial portion of forehead

superior trochlear nerve (of frontal nerve)

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innervates the part of skin of upper eyelid

superior trochlear nerve (of frontal nerve)

mostly by superior orbital tho

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innervates the iris and cornea

long ciliary nerve

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branches of nasocilliary nerve

short & long ciliary nerves
posterior & anterior ethmoid nerve
infratrochlear nerve

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branches of anterior ethmoid

internal nasal and external nasal

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posterior ethmoid enters the __

posterior ethmoid canal

supplies the frontal sinus

anterior ethmoid nerve

supplies mucous membrane inside the nose

internal nasal branch

supplies mucous membrane tip of the nose and skin over the ala

external nasal

supplies skin over the bridge of nose

infratrochlear nerve

exit of maxillary nerve

foramen rotundum ro2ndum

small branch of maxillary nerve in the cranium

middle meningeal nerve

nerve to the dura

middle meningeal nerve

zygomatic nerve branches of v2

zygomaticofacial | zygomaticotemporal

zygomaticofacial n. passes forward on the ___ and pierces through the _____

lateral orbital foramen | orbicularis oculi muscle

leaves the orbit between the great wing of sphenoid and the zygomatic bone to enter the temporal fossa

zygomaticotemporal n

supplies skin over the prominence of the zygomatic bone

zygomaticofacial n

supplies the skin over the anterior temporal fossa region

zygomaticotemporal n

branches of v2 within the pterygopalatine fossa

zygomatic nerve branches sphenopalatine ganglion posterior superior alveolar nerve (PSAN)

sphenopalatine ganglion branches (of v2 within pterygopalatine fossa)

1. orbital branches 2. nasal branches - -nasopalatine nerve - -posterior superior lateral nerve 3. palatine branches - -greater/anterior palatine nerve - -middle palatine nerve - -posterior palatine nerve 4. pharyngeal branches

nasopalatine exits through ---

nasopalatine foramen

supplies mucosa of the posterior part of nasal conchae

posterior superior lateral nerves

anterior palatine nerve exits through ---

greater palatine foramen (midd of 1st and 2nd molars)

middle palatine nerve and posterior palatine nerve exits through

lesser palatine foramen

innervates the mucous membrane of nasopharynx

pharyngeal branches | of sphenopalatine ganglion (v2)

supplies the periosteum of the orbit

orbital branches | of sphenopalatine ganglion (v2)

supplies the mucous membrane of posterior ethmoid cells and sphenoid sinus

orbital branches of sphenopalatine ganglion (v2) | posterior ethmoid nerve of nasociliary nerve (v1)

supplies the palatine mucosa and gingiva of ANTERIOR maxillary teeth

nasopalatine nerve | of nasal branches of the sphenopalatine ganglion (v2)

supplies the palatine mucosa and gingiva of the POSTERIOR maxillary teeth

greater/anterior palatine nerve of sphenopalatine ganglion (v2)

supplies the soft palate

middle palatine nerve of sphenopalatine ganglion (v2)

supplies the tonsillar area

posterior palatine nerve

supplies the palatine mucosa

nasopalatine | greater palatine nerve

PSAN enters the __-

Posterior superior alveolar canal

innervates the maxillary molars and their gingivae except the mesiobuccal root of 6s

PSAN

innervates mucouos membrane of maxillary sinus

PSAN

maxillary nerve enters the infraorbital canal to be called ___ AFTER giving off PSAN branch

infraorbital nerve

innervates the maxi PM and MB root of maxi 6s

middle superior alveolar nerve of infraorbital nerve

infraorbital branches (2)

MSAN | ASAN

supplies maxillary anterior teeth

ASAN

supplies labial gingiva of maxillary anterior teeth

ASAN

supplies the mucous membrane of the anterior part of the maxillary sinus

ASAN

SUPERIOR DENTAL PLEXUS

PSAN+MSAN+ASAN

innervation of all maxillary teeth

superior dental plexus | PSAN+MSAN+ASAN

terminal branches of v2 on the face

inferior palpebral branches lateral nasal or external nasal superior labial

supplies skin of lower eyelid and conjunctiva

inferior palpebral

supplies skin on the side of the nose

lateral nasal or external nasal

supplies skin and mucous membrane of upper lip

superior labial

v3 exits through

foramen ovale where it enters the infratemporal fossa

v3 division

undivided nerve anterior posterior division

branches of the undivided nerve

nervus spinosus/ mengingeal branch (sensory) | medial pterygoid n (motor)

supplies the dura of the posterior cranium

meningeal branch/nervus spinosus

supplies lining of mastoid cells

meningeal branch/nervus spinosus

supplies medial pterygoid m

medial pterygoid nerve

supplies tensor veli palatine m

medial pterygoid nerve

supplies tensor tympani m

medial pterygoid nerve

when the anterior division reaches the external surface of _____ it is now called ____

lateral pterygoid muscle | long buccal nerve/buccinator n/buccal n.

innervates the buccinator

facial nerve NOT the buccinator nerve!!

administered immediately after IAN block

long buccal nerve block

supplies buccal mucosa and gingiva of all molars

long buccal nerve (sensory)

supplies temporalis, masseter, lateral pterygoid m.

branches to the MOM (motor)

T/F lingual nerve is located medially while the inferior alveolar nerve is at the lateral

true

communicates with chorda tympani of the facial nerve for taste sensatin

lingual nerve

runs anterior and medial to the inferior alveolar nerve

lingual nerve

largest branch of the mandibular division

IAN

IAN enters the mandibular canal through the ___

mandibular foramen

forms the inferior dental plexus

IAN

innervates the mandibular posterior teeth

inferior dental plexus

terminal division of IAN at mental foramen

incisive n remaines w/in mandibular canal | mental n exits the canal through mental foramen

branches off from the IAN before it enters the mandibular foramen

mylohyoid n.

skin overlying structures innervated by the facial nerve

auricotemporal nerve

parotid gland

auricotemporal nerve

posterior portion of the TMJ

auricotemporal nerve

skin over temporal region

auricotemporal nerve

skin over helix and tragus of ear

auricotemporal nerve

EAM and tympanic membrane

auricotemporal nerve

anterior 2/3 of the tongue

lingual nerve

mucosa and gingiva on the lingual surfaces of the mandible

lingual nerve

mandibular posterior teeth

IAN

mandibular anterior teeth

incisive nerve

skin of chin

mental nerve

skin and mucous membrane of lower lip

mental nerve

anterior belly of digastric

mylohyoid nerve

skin on inferior and anterior surfaces of mental protruberance

mylohyoid nerve