Trigeminal Nerve

Question 1

Trigeminal Nerve Origin

Answer 1

Between Ventral Surface of Pons and Middle Cerebellar Peduncle

Question 2

Trigeminal Nerve Roots

Answer 2

Sensory Root
Motor Root

Question 3

Trigeminal Ganglion
Shape

Answer 3

Crescent

Question 4

Trigeminal Ganglion
Location

Answer 4

Apex of Petrous Temporal Bone

Question 5

Trigeminal Ganglion
What type of Cells form the Trigeminal Ganglion?

Answer 5

Pseudounipolar

Question 6

Trigeminal Ganglion
Peripheral Processes of the Pseudounipolar Cells form …

Answer 6

Opthalmic Nerve
Maxillary Nerve
Sensory Part of Mandibular Nerve

Question 7

Trigeminal Ganglion
Central Processes of Pseudounipolar Cells form …

Answer 7

Sensory Root of Trigeminal Nerve

Question 8

What are the divisions of the Trigeminal Nerve?

Answer 8

Ophthalmic Nerve (V₁): Purely Sensory
Maxillary Nerve (V₂): Purely Sensory
Mandibular Nerve (V₃): Mixed

Question 9

Pathway of Motor Root of Trigeminal Nerve

Answer 9

Originates from Motor Nucleus of Trigeminal Nerve
Passes under Trigeminal Ganglion
Unites with Mandibular Division of Trigeminal Nerve

Question 10

Nuclei
Nuclei of the Trigeminal Nerve

Answer 10

Mesencephalic Nucleus (Midbrain)
Main Sensory Nucleus (Pons)
Motor Nucleus (Pons)
Spinal Nucleus (Medulla)

Question 11

Nuclei: Mesencephalic Nucleus
Location

Answer 11

Midbrain

Question 12

Nuclei: Mesencephalic Nucleus
Function

Answer 12

Proprioception from:
Teeth
Facial Muscles
Extraocular Muscles
Muscles of Mastication

Question 13

Nuclei: Main Sensory Nucleus
Location

Answer 13

In Pons, Lateral to Motor Nucleus

Question 14

Nuclei: Main Sensory Nucleus
Continuous with ____ below

Answer 14

__spinal nucleus of trigeminal nerve__

Question 15

Nuclei: Main Sensory Nucleus
Function

Answer 15

Touch (Point Localization, 2 Point Discrimination)
Pressure
Vibration

Question 16

Nuclei: Main Sensory Nucleus
Receives sensation from …

Answer 16

V, VII, IX and X Nerves

Question 17

Nuclei: Motor Nucleus
Location

Answer 17

In Pons, Medial to Main Sensory Nucleus

Question 18

Nuclei: Motor Nucleus
Which Muscles does it supply?

Answer 18

MMTTA
Muscles of Mastication
Mylohyoid
Tensor Tympani
Tensor Palati
Anterior Belly of Digastric

Question 19

Nuclei: Spinal Nucleus
Location

Answer 19

Extends through Medulla and into Two Cervical Segments of Spinal Cord

Question 20

Nuclei: Spinal Nucleus
Function

Answer 20

Detection of Pain and Temperature

Question 21

Nuclei: Spinal Nucleus
Receives sensation from …

Answer 21

V, VII, IX, X Nerves

Question 22

Ophthalmic Nerve
Fill out Ophthalmic Nerve Pathway

Answer 22

Question 23

Ophthalmic Nerve
Fill out Ophthalmic Nerve Branches

Answer 23

Question 24

Maxillary Nerve
Distribution

Answer 24

Cheeks and Lower Eye Lids
Lateral Aspects of Nose
Maxillary Sinuses
Upper Lip, Teeth of Upper Jaw and Palate

Question 25

**Maxillary Nerve** Fill out Maxillary Nerve Pathway

Answer 25

Question 26

**Maxillary Nerve** Fill out Maxillary Nerve Branches

Answer 26

Question 27

**Pterygopalatine Ganglion** What is the Pterygopalatine Fossa?

Answer 27

Triangular Space

Question 28

**Pterygopalatine Ganglion** Anatomically belongs to ____ but functionally belongs to ____

Answer 28

__Maxillary Branch of Trigeminal Nerve__ __Facial Nerve__

Question 29

**Pterygopalatine Ganglion** Pterygopalatine Fossa boundaries

Answer 29

**Anterior**: Maxilla **Posterior**: Lateral Pterygoid Plate **Medially**: Perpendicular Palatine Bone

Question 30

**Pterygopalatine Ganglion** Relation to Maxillary Nerve

Answer 30

Pterygopalatine Ganglion suspended from Maxillary Nerve

Question 31

**Pterygopalatine Ganglion** Carries ____ and distributed via ____ to the _____

Answer 31

__Secretomotor Fibers__ __Greater Superior Petrosal Nerve__ __Lacrimal, Palatine, Pharyngeal and Nasal Gland__

Question 32

**Pterygopalatine Ganglion** Roots

Answer 32

**Parasympathetic Root**: Secretory Fibers from Greater Superficial Petrosal **Sympathetic Root**: Sympathetic Plexus from Deep Petrosal **Sensory root**: Maxillary Nerve

Question 33

**Mandibular Nerve** Fill out Mandibular Nerve Pathway

Answer 33

Question 34

**Mandibular Nerve** Fill out Mandibular Nerve Branches

Answer 34

Question 35

**Mandibular Nerve: Auriculotemporal Branch** Roots

Answer 35

Auricular Root Temporal Root

Question 36

**Mandibular Nerve: Auriculotemporal Branch** Pathway

Answer 36

Roots Encircle the Middle Meningeal Artery

Question 37

**Mandibular Nerve: Auriculotemporal Branch** Auricular Branch supplies ...

Answer 37

Skin over Upper Part of Auricle Anterior 1/2 of External Auditory Canal Tympanic Membrane

Question 38

**Mandibular Nerve: Auriculotemporal Branch** Temporal Branch supplies ...

Answer 38

Skin over Temple Parotid Gland

Question 39

**Mandibular Nerve: Lingual Branch** Supplies ...

Answer 39

Anterior ²/₃ of Tongue + Floor of Mouth Submandibular and Sublingual Salivary Glands

Question 40

**Mandibular Nerve: Inferior Alveolar Branch** Passes through the ...

Answer 40

mandibular foramen and canal

Question 41

**Mandibular Nerve: Inferior Alveolar Nerve** Mylohyoid Nerve function

Answer 41

Supplies Mylohyoid and Anterior Belly of Digastric

Question 42

**Mandibular Nerve: Inferior Alveolar Nerve** Mental Nerve function

Answer 42

Supplies Chin and Lower Lip ## Footnote Passes through Mental Foramen