Trigeminal nerve

Question 1

What are the section of the trigeminal nerve

Answer 1

Opthalmic nerve V1
Maxillary nerve V2
Mandibular nerve V3

Question 2

What are the branches of the opthalmic nerve

Answer 2

Supraorbital
Supratrochlear
Lacrimal
Infratrochlear
External nasal

Question 3

What are the branches of the maxillary nerve

Answer 3

Zygomaticotemporal
Zygomaticofacial
Infra-orbital

Question 4

What are the branches of the mandibular nerve

Answer 4

Auriculotemporal
Buccal
Mental

Question 5

What are the exit points of the branches of the trigeminal nerve from the skull

Answer 5

Supra-orbital notch (foramen)
Infra-orbital foramen
Mental foramen

Question 6

What bones make up the hard palate

Answer 6

Palatine process of maxilla (front)
Horizontal plate of palatine bone (back)

Question 7

What foramens are present in the hard palate

Answer 7

Incisive foramen (behind upper incisors)
Greater palatine foramen (bilateral beside upper 7s)
Lesser palatine foramen (bilateral behind the greater palatine foramens)

Question 8

What nuclei does the trigeminal nerve stem from

Answer 8

Special Visceral Efferent from the motor nucleus in the pons to the muscles of mastication

General Somatic Afferent to the mesencephalic, chief sensory & spinal nuclei in the midbrain, pons & medulla oblongata​

Question 9

What type of innervation does the trigeminal nerve provide

Answer 9

Supply general somatic sensation to most of the face, head & associated orbital, nasal & oral cavities

The mandibular division also contains the motor root for the muscles of mastication

Question 10

Where is the trigeminal ganglion

Answer 10

In meckel’s cave at the apex of the petrous temporal bone

Question 11

What brain matter does the trigeminal ganglion lie within

Answer 11

Dura matter

Question 12

When all 3 divisions of the trigeminal nerve are affected where is the site of the lesion

Answer 12

The pons (stroke) or at the cranial base (trauma or tumour)

Question 13

Where do the divisions of the trigeminal nerve leave the brain

Answer 13

V1 - superior orbital fissure
V2 - foramen rotundum
V3 - foramen ovale

Question 14

What would be evident if the divisions of the trigeminal nerve were affected in the cavernous sinus

Answer 14

There is usually evidence of an effect on other nerves too (CN3 and CN4

Question 15

What does the frontal nerve divide into

Answer 15

Suprorbital nerve
Supratrochlear nerve

Question 16

Where is the lacrimal gland

Answer 16

Sits behind upper eyelid

Question 17

What nerves supply the vertex, forhead and upper eyelids

Answer 17

Supra-orbital, supratrochlear and lacrimal

Question 18

What does the infratrochlear nerve supply

Answer 18

The skin at the medial angle of the eye and adjacent root of nose

Question 19

What supplies the tip of the nose

Answer 19

The external nasal branch of the anterior ethmoidal branch of the V1

Question 20

What would shingles at the tip of the nose indicate

Answer 20

That the disease may also develop on the cornea
WHY - As the branches of CN V1 supply the skin of the upper eyelid, they also supply the underlying conjunctiva both on the eyelid & over the cornea​

Question 21

What does the ethmoidal nerve supply

Answer 21

The ethmoidal sinuses, lateral wall of nasal cavity and nasal septum

Question 22

Where is the pterygopalatine fossa

Answer 22

lies just lateral to the upper aspect of the nasal cavity & nasopharynx behind the orbit & above the hard/soft palate​

Question 23

What anatomical landmarks suround the pterygopalatine fossa

Answer 23

Temporal fossa
Infratemporal fossa
Inferior orbital fissure

Question 24

What areas does the V2 nerve provide sensory innervation for

Answer 24

Middle face
Palate
Sinuses
Nasopharynx
Nose

Question 25

What nerve provides taste sensation for hard and soft palates

Answer 25

Maxillary V2 branch of trigeminal nerve

Question 26

What specific nerve innervates the maxillary soft palate

Answer 26

Lesser palatine nerve

Question 27

How do nerves enter orbit

Answer 27

Via inferior orbital fissure

Question 28

What is the course of the nasopalatine nerve

Answer 28

The nasopalatine nerve enters the nasal cavity via the sphenopalatine foramen to reach the nasal septum from where it courses inferiorly & passes via the incisive canal to reach the anterior hard palate​

Question 29

How many superior alveolar branches are there

Answer 29

3 anterior middle posterior

Question 30

Where do the palatine branches go

Answer 30

Stem from the pterygopalatine ganglion into palatine canal and through greater and lesser palatine foramens to supply soft palate and hard palate (lingual gingiva from 3-8)

Question 31

What provides sensory innervation to the upper teeth

Answer 31

Anterior superior alveolar - 13-23 Middle superior alveolar - premolars and MB of 1st molar Posterior superior alveolar - from DB of 1st molar back

Question 32

What nerves supply the gingiva of the maxillary arch

Answer 32

Anterior lingual - nasopalatine nerve Anterior labial - anterior superior alveolar nerve Premolars buccal - Middle superior alveolar Posterior molar buccal - posterior superior alveolar Posterior lingual - greater palatine nerve

Question 33

What nerves supply the maxillary palate

Answer 33

Nasopalatine nerve Greater palatine nerve Lesser palatine nerve

Question 34

Where does the nasopalatine nerve enter the nasalcavity

Answer 34

Sphenopalatine foramen

Question 35

What are the boundaries of the infratemporal fossa

Answer 35

Laterally: Ramus of the mandible​ Medially: Lateral pterygoid plate of sphenoid bone​ Anteriorly: Posterior aspect of maxilla​ Posteriorly: Tympanic plate, mastoid & styloid processes​ Superiorly: Infratemporal crest of sphenoid bone​ Inferiorly: Angle of the mandible

Question 36

What passes through the foramen ovale

Answer 36

mandicular branch of trigeminal nerve

Question 37

What enters the infratemporal fossa

Answer 37

Mandibular branch

Question 38

What supplies the skin over the angle of the mandible

Answer 38

Cervical plexus

Question 39

Wht provides sensory innervation to the anterior 2/3 of the tongue

Answer 39

Trigemnal nerve (mandibular branch)

Question 40

What are the main branches of the mandibular nerve section

Answer 40

Auriculotemporal Buccal Mental Lingual Muscular

Question 41

What smaller nerves stem from the main trunk of the mandibular division of Trigeminal nerve (before the main divisions)

Answer 41

Meningeal branch (sensory) Branch to tensor lympani Branch to tensor yeli palatani Nerve to medial pterygoid

Question 42

What smaller sections stem from the anterior trunk of the mandibular nerve

Answer 42

Deep temporal nerves Nerve to laterlal pterygoid Buccal nerve (sensory) Masseteric nerve

Question 43

What nerves originate from the posterior trunk of the mandibular nerve

Answer 43

Lingual nerve Inferior alveolar nerve (sensory and motor) Auriculotemporal

Question 44

What nerve **carries** the chorda tympani

Answer 44

Lingual nerve

Question 45

What is the chorda tympani a branch of

Answer 45

CN 7 - facial nerve

Question 46

What provides the sensory supply to the oral cavity

Answer 46

Buccal nerve to cheek & lateral gum​ Inferior alveolar nerve & its branch, the incisive nerve, to lower teeth​ Inferior alveolar nerve to skin of chin & lower lip (both skin & mucous membranes) as the mental nerve ​

Question 47

What does the inferior alveolar nerve supply

Answer 47

Mylohyoid and anterior belly of diagastric lower teeth (general sensation)

Question 48

What are the main nerve that supply sensation to the teeth

Answer 48

Anterior/middle/posterior superior alveolar nerve Inferior alveolar nerve Incisive nerve - branch of inferior alveolar

Question 49

What supplies the tongue with taste sensation

Answer 49

Chorda tympani -facial nerve

Question 50

What nerve has the motor root for the muscles of mastication

Answer 50

Mandibular branch of trigeminal nerve

Question 51

What supplies sensation to the back of the head/scalp

Answer 51

Cervical nerves C2&C3

Question 52

Which branches of the trigeminal nerve divisions supply general sensory innervation to the face and forehead

Answer 52

Supraorbital Supratrochlear Zygomaticotemporal Auriculotemporal

Question 53

What nerve supplies all the muscles of facial expression

Answer 53

Facial nerve