Trigeminal Nerve Flashcards
Trigeminal Nerve Origin
Between Ventral Surface of Pons and Middle Cerebellar Peduncle
Trigeminal Nerve Roots
Sensory Root
Motor Root
Trigeminal Ganglion
Shape
Crescent
Trigeminal Ganglion
Location
Apex of Petrous Temporal Bone
Trigeminal Ganglion
What type of Cells form the Trigeminal Ganglion?
Pseudounipolar
Trigeminal Ganglion
Peripheral Processes of the Pseudounipolar Cells form …
Opthalmic Nerve
Maxillary Nerve
Sensory Part of Mandibular Nerve
Trigeminal Ganglion
Central Processes of Pseudounipolar Cells form …
Sensory Root of Trigeminal Nerve
What are the divisions of the Trigeminal Nerve?
Ophthalmic Nerve (V1): Purely Sensory
Maxillary Nerve (V2): Purely Sensory
Mandibular Nerve (V3): Mixed
Pathway of Motor Root of Trigeminal Nerve
Originates from Motor Nucleus of Trigeminal Nerve
Passes under Trigeminal Ganglion
Unites with Mandibular Division of Trigeminal Nerve
Nuclei
Nuclei of the Trigeminal Nerve
Mesencephalic Nucleus (Midbrain)
Main Sensory Nucleus (Pons)
Motor Nucleus (Pons)
Spinal Nucleus (Medulla)
Nuclei: Mesencephalic Nucleus
Location
Midbrain
Nuclei: Mesencephalic Nucleus
Function
Proprioception from:
Teeth
Facial Muscles
Extraocular Muscles
Muscles of Mastication
Nuclei: Main Sensory Nucleus
Location
In Pons, Lateral to Motor Nucleus
Nuclei: Main Sensory Nucleus
Continuous with ____ below
__spinal nucleus of trigeminal nerve__
Nuclei: Main Sensory Nucleus
Function
Touch (Point Localization, 2 Point Discrimination)
Pressure
Vibration
Nuclei: Main Sensory Nucleus
Receives sensation from …
V, VII, IX and X Nerves
Nuclei: Motor Nucleus
Location
In Pons, Medial to Main Sensory Nucleus
Nuclei: Motor Nucleus
Which Muscles does it supply?
MMTTA
Muscles of Mastication
Mylohyoid
Tensor Tympani
Tensor Palati
Anterior Belly of Digastric
Nuclei: Spinal Nucleus
Location
Extends through Medulla and into Two Cervical Segments of Spinal Cord
Nuclei: Spinal Nucleus
Function
Detection of Pain and Temperature
Nuclei: Spinal Nucleus
Receives sensation from …
V, VII, IX, X Nerves
Ophthalmic Nerve
Fill out Ophthalmic Nerve Pathway
Ophthalmic Nerve
Fill out Ophthalmic Nerve Branches
Maxillary Nerve
Distribution
Cheeks and Lower Eye Lids
Lateral Aspects of Nose
Maxillary Sinuses
Upper Lip, Teeth of Upper Jaw and Palate
Maxillary Nerve
Fill out Maxillary Nerve Pathway
Maxillary Nerve
Fill out Maxillary Nerve Branches
Pterygopalatine Ganglion
What is the Pterygopalatine Fossa?
Triangular Space
Pterygopalatine Ganglion
Anatomically belongs to ____ but functionally belongs to ____
__Maxillary Branch of Trigeminal Nerve__
__Facial Nerve__
Pterygopalatine Ganglion
Pterygopalatine Fossa boundaries
Anterior: Maxilla
Posterior: Lateral Pterygoid Plate
Medially: Perpendicular Palatine Bone
Pterygopalatine Ganglion
Relation to Maxillary Nerve
Pterygopalatine Ganglion suspended from Maxillary Nerve
Pterygopalatine Ganglion
Carries ____ and distributed via ____ to the _____
__Secretomotor Fibers__
__Greater Superior Petrosal Nerve__
__Lacrimal, Palatine, Pharyngeal and Nasal Gland__
Pterygopalatine Ganglion
Roots
Parasympathetic Root: Secretory Fibers from Greater Superficial Petrosal
Sympathetic Root: Sympathetic Plexus from Deep Petrosal
Sensory root: Maxillary Nerve
Mandibular Nerve
Fill out Mandibular Nerve Pathway
Mandibular Nerve
Fill out Mandibular Nerve Branches
Mandibular Nerve: Auriculotemporal Branch
Roots
Auricular Root
Temporal Root
Mandibular Nerve: Auriculotemporal Branch
Pathway
Roots Encircle the Middle Meningeal Artery
Mandibular Nerve: Auriculotemporal Branch
Auricular Branch supplies …
Skin over Upper Part of Auricle
Anterior 1/2 of External Auditory Canal
Tympanic Membrane
