Unit I Nerves of the neck Flashcards
The tympanic nerve provides senory innervation to
the tympanic cavity
The tympanic nerve provides secretomotor innervation to
the parotid gland
What nerve senses pain in the otitis media?
the tympanic nerve
The branch to the carotid sinus provides sensory innervation to
both the carotid sinus and body
What nerves unite to form the pahryngeal plexus?
pahryngeal, vagus,and sympathetic trunk
The pharyngeal branch provides sensory innervation to
the pharynx
What nerve sense pain in acute pharyngitis?
the pharyngeal branch
What gives off an afferent limb in the gag reflex?
the pharyngeal branch
The branch to the stylopharyngeus provides motor innervation to what muscle?
stylopharyngeus muscle
The tonsillar branch provides sensory innervation to
to the mucous membranes over the tonsil and soft palate
The lingual branch provides taste and general sensation to
the posterior 1/3 of the tongue
What is the longest cranial nerve?
the vagus (CN X)
The two ganglia in the neck of the vagus
superior (jugular), and inferior (nodose) ganglion
What does the meningeal branch arise from?
the superior (jugular) ganglion of the vagus
What does the meningeal branch supply sensory innervation to?
the dura mater
What branch of the vagus may be involed in cervicogenic headaches?
the meningeal branch
What does the auricular branch arise from?
the superior (jugular) ganglion
The auricular branch supplies sensory innervation to what?
the suricle, floor of the external auditory meatus, and tympanic membrane
What branch ofthe vagus senses pain in external otitis?
the auricular branch
What does the pharyngeal branch arise from?
the inferior (nodose) ganglion
The pharyngeal branch provides motor innervation to
all muscles of the pharynx (except stylopharyngeus) and soft palate (except tensor veli palatini)
Where do most of the fibers of the pharyngeal branch originate from?
the cranial part of the accessory nerve
Where does the superior laryngeal nerve arise from?
the inferior (nodose) ganglion
What are the divisions of the superior laryngeal nerve?
internal and external laryngeal nerves
The internal laryngeal nerve provides sensory innervation to
the mucous membrane of the larynx superior to the true vocal cords
the external laryngeal nerve provides motor innervation to
the cricothyroid and inferior constrictor muscles
What does the recurrent laryngeal nerve arise from?
the vagus within the thorax and ascends back to the neck
The recurrent laryngeal nerve provides sensory innervation to
the mucous membranes of the larynx below the true vocal folds, and trachea
The recurrent laryngeal nerve provides motor innervation to
all muscles of the larynx except the cricothyroid
What would be the clinical significance of unilateral damage to the recurrent laryngeal nerve?
respirtory distress and hoarseness
What would be the clinical significance of bilateral damage to the recurrent laryngeal nerve?
aphonia, and could result in possible suffocation from spasming of the larynx
What could be casues of damage to the recurrent laryngeal nerve?
thyroid surgery trauma, goiter of thyroid tumor, lung tumor, and aortic aneurysm
The accessory nerve is formed by the union of what?
A cranial and spinal part
What does the cranial part of the accessory nerve originate from?
the medulla oblongata
What does the spinal part of the accessory nerve originate from?
the sides of the spinal cord
Where does the cranial part of the accessory nerve join the vagus?
just above the inferior vagal ganglion
The crainial part of the accessory nerve provides motor fibers to vagus which travel in
thre pharyngeal branch of vagus and recurrent laryngeal nerve
The spinal part of the accessory provides motor innervation to
the SCM and trapezius
The hypoglossal nerve provdies motor innervation to
the tongue
The meningeal branches of the hypoglassal innervate
the dura mater
The superior root of the ansa cervicalis mostly consists of
C1
The inferior root of the ansa cervicalis consists mostly of
C2, C3
The ansa cervicalis proveds motor innervation to
the infrahyoid muscles
The lingual branches of the hypoglossal nerve provides motor innervation to
the extrinsic and intrinsic muscle of the tongue
Nerves to the thyrohyoid and geniohyoid provide motor innervation to
the thyrohyoid and geniohyoid muscles
What fibers mostly make up the nerves to the thyrohyoid and geniohyoid?
mainly C1 of the ansa cervicalis
Where do the preganglionic sympathetic fibers which supply the head and neck originate from?
T1-T3
Which cervical sympathetic ganglion supplies everythingin the head?
the superior cervical ganglion
At what vertebral levels does the superior cervical ganglion lie?
between cervical vertbra 1-3
What are the three branches of the superior cervical ganglion?
internal carotid nerve, superior cervical cardiac nerve, and branches to the pahryngeal plexus
At what vertebral level(s) does the middle cervical ganglion lie?
C6
List a branch of the middle cervical ganglion
middle cervical cardiac nerve
Besides the cardiac plexus, what else does the middle carvical ganglion supply?
the thyroid
Being variable, what is the vertebral ganglion usually fused with?
the inferior or middle cervical ganglion
At what vertebral level(s) does the vartebral ganglion lie?
C7
The cervicothioracic (stellate) ganglion is formed by
the inferior cervical ganglion to the 1st thoracic ganglion
At what vertebral levels does the cervicothoracic (stellate) ganglion lie?
C7-T1
List a branch of the cervicothoracic (stellate) ganglion
inferior cervical cardiac nerve
A nerve bundle which loops anterior to the subclavian artery, connecting the vertebral ganglion to the cervicothoracic (stellate) ganglion
ansa subclavia
