Nerves Flashcards
What is the largest division of the trigemenal nerve?
the mandibular division V3
Where does the V3 nerve exits the cranial cavity into the infratemperol fossa?
the foramen Ovale
What does the V3 nerve carrying with it?
general afferents
general efferents
Where are the general afferents from?
from the lower teeth and gums, the anterior 2/3 of tongue, the floor of mouth, the lower lip and chin, the skin of temple lower face and dura of the middle cranial fossa.
What are the general efferents going?
muscles of mastication (masseter, temporalis, medial and lateral
pterygoids),
two muscles in the neck/floor of the mouth (anterior belly of the digastric and
mylohyoid muscle),
one soft palate muscle (tensor veli palatini), one muscle of the middle
ear (tensor tympani).
What are the parasympathetic ganglia the V3 nerve suspend?
otic
submandibular
What special afferent fibers does V3 carry?
taste from anterior 2/3 tongue to facial nerve 7
What are the general afferent branches of V3?
Mennungal branch Buccal nerve auriculotemporal nerve lingual nerve inferior alveolar nerve
Where does the menningal afferent branch of V3 enter?
middle cranial fossa
How does the menningal branch get into the cranial fossa?
Foramen spinosum
enters with menningal artery
What does the menningal branch carry with it?
general afferents from the dura of the middle cranial fossa
Where does the buccal nerve pass?
passes anteriorly between the heads of the lateral pterygoid muscle and winds up superficially positioned in the cheek.
What does the buccal nerve carry?
general afferents from the skin of the cheek and oral mucosa.
Where does the auriculotemporal nerve originate?
originates as two roots that pass posteriorly around the middle meningeal artery.
Where does the auriculotemporal nerve continue posteriorly?
posteriorly between the tensor veli palatini and the lateral pterygoid muscles and then between the sphenomandibular ligament and the neck of the mandible.
Where does auriculotemporal ascends to?
It ascends deep to the parotid gland between the ear and the TMJ
What does the auriculotemporal nerve carry with it?
general afferents from the skin of the temple and ear,
general afferents and proprioception from the TMJ, which is highly sensitive.
carries hitchhiking postganglionic parasympathetic fibers to the parotid gland.
Where does the lingual nerve descend?
descends between the tensor veli palatini and the lateral pterygoid muscles and is joined by the chorda tympani branch of the facial nerve (VII)
where does the lingual pass after it descends?
passes across the medial pterygoid muscle close to the lingula of the mandible and into the floor of the mouth
Where does the lingual nerve lie in the floor of the mouth?
it lies next to the ramus of the mandible just inferior to the last molar tooth
Where is the lingual palpable?
through the oral mucosa
What does the lingula nerve suspend in the floor of the mouth?
suspends the submandibular ganglion
What does the lingula nerve carry?
general afferents from the anterior 2/3 of the tongue, the floor of the mouth and the lingual gums.
parasympathetic and special afferent (taste) fibers from the chorda tympani nerve.
Where does the inferior alveolar nerve descend?
descends between the tensor veli palatini and the lateral pterygoid muscles and across the medial pterygoid muscle.
