Parotid Gland Facial Nerve Flashcards
What is the largest salivary gland?
Parotid gland
The parotid gland is enclosed within a tough _____ ____ (the _____ ____), derived from the _____ layer of deep cervical fascia
Facial capsule
Parotid sheath
Investing
The parotid gland is wedged where?
Between the ramus of the mandible and the mastoid process
Where does the parotid duct pass?
Horizontally from the anterior edge of the gland, at anterior border of masseter
It turns medially, penetrates the buccinators muscle and enters the oral cavity where it opens opposite to the upper second molar tooth
Three important structures embedded within the parotid gland (superficial to deep)
Facial nerve
Retromandibular vein
External carotid artery
Innervation of the parotid gland
Great auricular nerve
Auriculotemporal nerve
Glossopharyngeal nerve
Great auricular nerve (___ and ___) provides:
C2 and C3
Sensory supply to the parotid sheath, gland, and overlying skin
The auricutemporal nerve is a branch of:
It provides:
And carries:
Mandibular division of trigeminal nerve
Sensory innervation
The postgangionic parasympathetic nerve from the optic ganglion to the parotid gland
The glossopharyngeal nerve supplies what?
The secretory fibers to the parotid gland
Motor innervation of the facial nerve
The muscles of facial expression
Posterior belly of digastric
Stylohyoid
Stapedius muscles
Sensory innervation of the facial nerve
Small area behind the auricle
Special sensory innervation of the facial nerve
Taste sensation to the anterior 2/3 of the tongue
Parasympathetic innervation from the facial nerve
Supplies all the glands of the head and neck EXCEPT the parotid gland
The facial nerve arises in the _____ as what two roots?
Pons
Large motor root
Small sensory root (intermediate nerve)
The two roots of the facial nerve pass though the ____ ___ ___, long channel in the ____ part of the ____ bone.
Internal acoustic meatus
Petrous
Temporal
Where do the 2 roots to for the facial nerve fuse? What does this form?
In the facial canal
Forms the facial nerve and the geniculate ganglion (collection of nerve cell bodies)
Branches of the facial nerve from the facial canal
Greater petrosal nerve
Nerve To stapedius
Chorda tympani
The greater petrosal nerve supplies:
Parasympathetic fibers to the lacrimal gland
The nerve to stapedius provides:
Motor fibers to stapedius muscle of the middle ear
The chorda tympani provides special sensory fibers to:
And parasympathetic fibers to:
Anterior 2/3 of the tongue
The submandibular and sublingual glands
After exiting the ear, the chorda tympani enters the ______ fossa where it joins the:
Infratemporal
Lingual
Where does the facial nerve exit?
The stylomastoid foramen
After exiting the stylomastoid foramen, the facial nerve turns ____ toward the ____ ___, where it pierces the deep surface and forms:
Medial
Parotid gland
Plexus within the gland, parotid plexus
Extracranial facial nerv e branches (not within the parotid gland)
Positioned auricular nerve
Nerve to the post belly of the digastric muscle
Nerve to the stylohyoid muscle
What does the posterior auricular nerve innervate?
The intrinsic and extrinsic muscles of the outer ear and the occipital bell of the occipitofrontalis muscle
Terminal branches of the facial nerve within the parotid gland
Temporal branch
Zygomatic branch
Buccal branch
Marginal mandibular branch
Cervical branch
The temporal branch of the facial nerve innervates:
Frontalis, orbicularis oculi
Zygomatic branch of the facial nerve innervated what
Orbicularis oculi
Buccal branch of the facial innervates what
Orbicularis oris
Buccinators
Zygomaticus muscles
The marginal mandibular branch of the facial nerve innervates what
Mentalis muscle
The cervical branch of the facial nerve innervates:
Platysma
