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Hong PNS 2
Cranial nerves 7-12, Brachial Plexus, Lumbosacral Plexus, Celiac Plexus PCC StacheNotes
49
Anatomy
Graduate
08/17/2011

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Term
What is the apparent origin for the facial nerve?
Definition
The caudal border of the pons (lateral to the reccess between the olive and the restiform body)
Term
What is the name of the small sensory root to the facial nerve?
Definition
Nervus Intermedius.
Term
How many nuclei does the facial nerve possess?
Definition
3! (2 origin, 1 termination)
Term
The Nucleus of the facial nerve
1. what does it supply
2. location
Definition
1. supplies somatic efferent fibers to the facial muscles.
2. lies in the reticular formation of the caudal part of the pons and ventromedial to the pontine nucleus of the trigeminal nervee.
Term
Where would you find the superior salivatory nucleus?
Definition
in the reticular formation
Term
What does the superior salivatory nucleus do?
Definition
it sends visceral motor fibers to join the sensory root.
Term
Where would you find the upper part of the nucleus of the tractus solitarius of the medulla oblongata?
Definition
In the medulla oblongata dorsomedial to the spinal nucleus of the trigeminal nerve.
Term
So, what can you tell me about the upper part orf the nucleus tractus solitarius of the medulla oblongata (other than its location)
Definition
Receives afferent fibers from the sensory root.
Sends efferent fibers to ventral group of nuclei of the lateral part of the thalamus of the opposite side.
Term
What makes up the nervus intermedius?
Definition
1) a central process of the unipolar cells of the genicular ganglion (passing through the internal acoustic meatus)
2. Efferent preganglionic parasympathetic fibers for the submandibular, sublingual, salivary glands, the lacrimal gland, and pharyngeal, nasal, and palatine glands.
Term
The facial nerve communicates with the ___________ N. in the intracranial area.
Definition
Vestibularcochlear
Term
What does the facial nerve communicate with through the genicular ganglion?
Definition
1.Pterygopalatine ganglion (through greater petrosal nerve)
2. Otic Ganglion (through lesser petrosal nerve
3. Middle meningeal sympathetic plexus
Term
Facial branches of communication within the facial canal
Definition
auricular nerve of vagus
Term
Facial N. branches of communication at exit from stylomastoid foramen.
Definition
Auriculotemporal nerves
Term
Facial nerve communications with the lesser occipital nerve occur
Definition
with the posterior auricular ns
Term
Facial nerve communicates with what nerve all over the face?
Definition
Trigeminal
Term
Facial nerve communicates with what in the cervical region?
Definition
the transverse (cutaneous) cervical nerve.
Term
Where does the Greater Petrosal Nerve arise?
Definition
from the genicular ganglion.
Term
What fibers does the greater petrosal nerve carry?
Definition
Taste fibers from the palate
Preganglionic parasympathetic fibers for the lacrimal, nasal, and palatine mucosal glands (secretomoter fibers come from facial nerve, superior salivatory nucleus)
Term
What nerve joins the greater petrosal nerve in the foramen lacerum?
Definition
the deep petrosal nerve (with their powers combined they become the nerve of the pterygoid canal)
Term
Tell me about the lesser petrosal nerve
Definition
It is conveyed to the otic ganglion from the auricular branch of the vagus nerve
A branch from the facial nerve joins the lesser petrosal near the genicular ganglion
Term
Tell me two things about the external petrosal nerve
Definition
it comes from the sypathetic plexus on the middle meningeal artery.
It joins the genicular ganglion.
Term
Branches of the facial nerve within the facial canal
Definition
nerve to stapedius
Chorda Tympani
Term
Branches of the facial nerve at the exit of the stylomastoid foramen
Definition
Posterior auricular
Digastric
Stylohyoid
Term
Branches of the facial nerve on the face
Definition
temporal
zygomatic
buccal
marginal mandibular
cervical nerves
Term
What N. does chorda tympani join with?
Definition
the lingual n.
Term
What efferent fibers does chorda tympani N. carry?
Definition
efferent preganglionic parasympathetic (secretomotor) fibers to submandibular ganglion. (relayed to submandibular and sublingual glands with postganglionic fibers)
Term
what are the majority of fibers carried in chorda tympani?
Definition
afferent from the anterior, presulcal part of the tongue
Term
Before chorda tympani joins with the lingual nerve, what is it joined by?
Definition
A small branch from the otic ganglion
Term
What does the Posterior Auricular Nerve Communicate with?
Definition
Posterior branch of the great auricular nerve and with the lesser occipital nerve. (it is joined by a branch from the auricular branch of vagus)
Term
What does the Posterior Auricular Nerve become?
Definition
it divides into an auricular and an occipital n.
(the auricular n suppplis the auricularis posterior and the intrinsic muscles of the cranial surface of the auricle)
(The occipital nerve supplies the occipital belly of the occipitofrontalis)
Term
The digastric joins what nerve?
Definition
The glossopharyngeal N.
(it innervates the posterior belly of the digastric muscle)
Term
The Stylohyoid N. frequently arises with what nerve?
Definition
the digastric n.
(it innervates the stylohyoid muscle, which is pierced by the tendon of digastric)
Term
What do the temporal n, facial cross to get to the temporal region?
Definition
the zygomatic arch
Term
What do the temporal nerves, facial n innervate?
Definition
the intrinsic muscle on the lateral surface of the auricle, the anterior and superior auricular muscles,* the frontal belly of the occipitofrontalis, the orbicularis occuli, and corrugator supercilii
(*after being joined with zygomaticotemporal nerve, maxillary n and auriculotemporal, mandibular n)
Term
Beside the zygomaticotemporal n of the maxillary n and the auriculotemporal n of the mandibular n what nerves does the temporal n of facial join with?
Definition
supraorbital and lacrimal nerves of the ophthalmic nerve
Term
What are the intrinsic muscles of the auricle?
Definition
helicis major
helicis minor
tragicus
antitragicus
transvers auriculae
oblique auriculae
Term
What do the zygomatic nerves of facial innervate?
Definition
the orbiicularis oculi (they join the lacrimal nerve and the zygomaticofacial nerve of the maxillary nerve)
Term
What do the buccal nerves supply?
Definition
The superficial branches supply Procerus (join with the infratrochlear and external nasal nerves)
The deep branches supply the zygomaticus major, levetor labii superioris, levator anguli oris, zygomaticus minor, levator labii superioris alaeque nasi, and small muscles of the nose (they form the infraorbital plexus with superior labial nerve of the infraorbital nerve)
The Lower deep branches supply the buccinator and orbicularis oris (they join with the buccal nerve of the mandibular nerve)
Term
How does the marginal mandibular nerve run?
Definition
below the angle of the mandible under cover of the platysma.
Term
What supplies the risorius and the muscles of the lower lip and chin?
Definition
Why the marginal mandibular nerve does of course.
Term
What nerve issues from the lower part of the parotid gland?
Definition
The Cervical nerve (VII)
Term
What nerves run under the cover of the platysma?
Definition
Cervical Nerve, Facial N
Marginal Mandibular, Facial
Term
What n supplies the platysma?
Definition
The cervical nerve, Facial
Term
What n does the cervical n, facial communicate with?
Definition
the transverse cutaneous cervical nerve
Term
What does the Submandibular ganglion lie on?
Definition
It lies on the upper part of the hyoglossus.
Term
The Submandibular ganglion connected functionally with:
Definition
the facial nerve and its chorda tympanic nerve (as a peripheral ganglion of the parasympathetic system)
Term
What is the path of the parasympathetic root to the submandibular ganglion?
Definition
1) From the superior Salivatory Nuceus
2) Runs in the facial, chorda tympani, and lingual nerve
3) reaches submandibular gang.
Term
Tell me about the postganglionic fibers of the submandibular ganglion.
Definition
they are secretomotor fibers to the submandibular, sublingual, and anterior lingual glands.
Term
What causes facial paralysis associated with the facial nerve?
Definition
Inflamation of the facial nerve close to the sylomastoid foramen
(known as Bell's Palsy)
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