Trigeminal nerve Flashcards
What are the three divisions of CN V and exits
Ophthalmic; SOF
Maxillary; Rotundum
Mandibular; Ovale
Divisions of the Mandibular nerve
Auriculotemporal Buccal Lingual Inferior alveolar: mental nerve Mylohyoid
What does the CN V somatic afferent GSA fibers innervate (3)
facial skin
Most nasopharyngeal mucosa
anterior 2/3 of tongue
What nerves are anesthetized by the ASA (4)
Inferior palpebral nerve
Infraorbital nerve
External nasal nerve
Superior labial nerve
What muscles are innervated by CN V3 SVE (motor)
Temporalis Masseter Medial and lateral pterygoids Mylohyoid anterior digastric tenson tympani Tensor veli palatini
What muscles elevate the mandible
temporalis
Masseter
Medial pterrygoids
what muscles depress the mandible
Lateral pterygoids
supra hyoid muscles
Infra hyoid muscles
What nerve innervates the masseter muscle
Masseteric nerve
What are the actions of the masseter muscle
Mandible; Elevation Protrusion Retrusion lateral excursion
What innervates the temporalis muscle
deep temporal nerves of CN V3
what are the functions of the Temporalis
most powerful muscle of mastication; 50%
Retrusion
Elevation
Lateral excursion
what muscles retrude/retract the mandible
posterior fibers of the temporalis
Deep heads of the masseter muscles
What muscles protrude/protract the mandible
lateral pterygoid
Medial pterygoid
superficial heads of the masseter
what muscles swing the mandible right
Right masseter
Right Temporalis
Left medial pterygoid
Left lateral pterygoid
What is the action of bilateral lateral pterygoid contractions
initiates mouth opening by protruding mandible
Moves articular disk forward
