THRC.12 Flashcards
CN-V
Trigeminal nerve
Summarise trigeminal nerve
- The largest sensory nerve of the head
- Sensory fibres of the skin
- Motor fibres to masticatory musculature
The motor fibres of trigeminal nerve originate from…
Motor nucleus of the trigeminal nerve
Where is the motor nucleus of the trigeminal nerve located?
Metencephalon
Sensory fibres of the trigeminal nerve originate from…
Trigeminal ganglion → Sensory trigeminal nuclei
Location of the trigeminal ganglion
Petrosal bone
Give the branches of the trigeminal ganglion
- Ophthalmic nerve (V1)
- Maxillary nerve (V2)
- Mandibular nerve (V3)
What is shown?
What do the colours represent?

Primary branches of the ophthalmic nerve (CN-V1) (eq)
- Blue = Sensory
- Red = Motor
- Green = Parasympathetic

Frontal nerve

Lacrimal nerve

Ophthalmic nerve (V1)

Orbital fissure

Nasociliary nerve

Ethmoidal foramen

Ethmoidal nerve

Lamina cribrosa

Infratrochlear nerve

Ciliary ganglion

Pterygopalatine ganglion

Major petrosal nerve (VII)
The ophthalmic nerve (V1) shares a sheath with…
- Maxillary nerve (CN-V2)
- Trochlear nerve (CN-IV)
- Abducent nerve (CN-VI)

Lacrimal gland
Give the branching of the ophthalmic nerve
- Lacrimal nerve
- Frontal nerve
- Nasociliary nerve
- Ethmoidal nerve
- Infratrochlear nerve
What is shown?
What do the colours represent?

Primary branches of the maxillary nerve (CN-V2) (eq)
- Blue = Sensory
- Red = Motor
- Green = Parasympathetic

Lacrimal gland with lacrimal nerve

Caudal nasal nerve

Infraorbital nerve

Alveolar branch

Incisive branch

Minor palatine nerve

Minor palatine nerve

Zygomatic nerve

Minor petrosal nerve

Otic ganglion

Major pertrosal nerve
3

Sphenopalatine foramen

Pterygopalatine ganglion
4

Foramen palatinum majus
2

Maxillary foramen
Maxillary nerve (CN-V2) function
Sensory:
- Lower eyelid
- Upper lip/teeth
- Nose
Before leaving the cranial cavity, maxillary nerve branches off…
Meningeal branch
Give the branching of the maxillary nerve
- Zygomatic nerve
- Pterygopalatine nerve
- Caudal nasal nerve
- Major palatine nerve
- Minor palatine nerve
- Infraorbital nerve
What is shown?
What do the colours represent?

Primary branches of the mandibular nerve (CN-V3) (eq)
- Blue = Sensory
- Red = Motor
- Green = Parasympathetic

Auriculotemporal nerve

Masseteric nerve

Pterygoid nerve

Mylohyoid nerve

Lingual nerve

Buccal nerve

Inferior alveolar nerve

Alveolar nerve

Mental nerve
2

Mandibular foramen
3

Incisura ovalis, foramen lacerum
4

Mandibular ganglion
Mandibular nerve (CN-V3) function
Motor:
- Prehension muscles
- Mastication muscles
Sensory:
- Tongue
- Lower teeth
- Lower lip
Give the branching of the mandibular nerve
- Masticator nerve
- Buccal nerve
- Auriculotemporal nerve
- Lingual nerve
- Inferior alveolar nerve
Trigeminal nerve exits the cranium via…
Ophthalmic: Foramen rotundum/fissura orbitalis
Maxillary: Foramen rotundum / fissura orbitalis
Mandibular: Foramen ovalis