This site is 100% ad supported. Please add an exception to adblock for this site.

Misc Head and Neck

Terms

undefined, object
copy deck
carotid canal
provides a passageway for internal carotid A to enter the cranial cavity
foramen ovale
provides a passageway for the mandibular branch of the trigeminal nerve (V3) to enter the infratemporal fossa from the cranial cavity
what passes through the jugular foramena?
IX, X, XI, and the internal jugular vein
anterior nasal choana
opening to the nasal cavity
pterygoid canal
pterygoid N traverses this canal to get to the pterygopalatine fossa

pterygoid N is made up of the greater petrosal and deep petrosal N's
what is the origin of the greater occipital N?
dorsal ramus of spinal nerve C2
what three nerves originate from the ventral rami of cervical nerves C2 and C3?
greater auricular,lesser occipital, and transverse cervical nerves
what is the origin of the supraclavicular N?
ventral rami of C3 & C4
superficial layer of the deep cervical fascia
covers the posterior cervical triangle

splits to cover the trapezius and sternocleidomastoid M's

forms the stylomandibular L
chorda tympani
carries taste fibers from the anterior 2/3 of the tongue and preganglionic parasympathetic fibers headed for the submandibular ganglion
taste perception of the tongue
- anterior 2/3
chorda tympani, CN VII
taste perception of the tongue
- posterior 1/3
glossopharyngeal (CN IX)
epiglottic region
- innervation
CN X (Vagus)
what are the four cranial nerves that have parasympathetic components?
oculomotor, facial, glossopharyngeal, and vagus
rules of one exception
- all muscles of the pharynx . . .
are innervated by the vagus N (CN X) except the stylopharyngeus M, which is innervated by the glossopharyngeal N (CN IX)
rules of one exception
- all muscles of the palate . . .
are innervated by the vagus N (CN X) except the tensor veli palatini M, which is supplied by the trigeminal N
rules of one exception
- all muscles of the larynx
are innervated by the inferior laryngeal N (from the recurrent laryngeal branch of CN X) except the cricothyroid M, which is innervated by external branch of the superior laryngeal nerve (also from CN X)
rules of one exception
- all muscles of the tongue
are innervated by the hypoglossus N (CN XII) except the palatoglossus M, which is supplied by the vagus N (CN X)
the pharyngeal plexus is formed on the middle constrictor by the . . .
Glossopharyngeal

Vagus

Superior Cervical Sympathetic Ganglion (Postganglionic Sympathetics)
lesser petrosal nerve
- origin and destination
begins with the glossopharyngeal N and synapses at the otic ganglion
what nerve innervates the anterior belly of the digastric M and the mylohyoid M?
mylohyoid N, which branches from the inferior alveolar N
which main branches of the trigeminal nerve are purely sensory in nature?
ophthalmic and maxillary
where do the posterior ethmoid air cells drain into?
the superior meatus
the sphenoethmoidal recess of the nose usually receives drainage from the . . .
sphenoid sinus
innervation of the muscles of mastication
mandibular branch of the trigeminal N
Bell's palsy
paralysis of the facial nerves
what is the SOLE purpose of the abducens N?
to innervate the Lateral Rectus M
what gives general sensation to the anterior 2/3rd of the tongue?
the mandibular branch of the trigeminal N
what is the only muscle that the glossopharyngeal N innervates?
stylopharyngeus M
chart the parasympathetic pathway to the parotid gland
Inferior salivatory nucleus (preganglionics arise)
Glossopharyngeal N (CN IX)
Tympanic N
Tympanic Plexus
Lesser Petrosal Nerve
Otic Ganglion (postganglionics arise)
Auriculotemporal N
Parotid gland
what innervates the tensor tympani M?
the motor root of the mandibular division of CN V
what innervates the stapedius M?
facial N
inferior orbital fissure
a slitlike opening located b/t the greater wing of the sphenoid bone and the orbital surface of the maxilla
what are the ONLY abductors of the vocal folds?
posterior cricoarytenoid M's
what nerves are found in the outer wall of the cavernous sinus?
III, IV, V1, V2
what two things are oddly enough found within the cavernous sinus?
internal carotid artery and VI
what does the ansa cervicalis complex innervate?
infrahyoid muscles (strap muscles) and the geniohyoid muscles
what two nerves come together to form the nerve of the pterygoid canal?
the deep petrosal nerve (postganglionic sympathetics) and the greater petrosal nerve (preganglionic sympathetics)
which nerve innervates the anterior belly of the digastric M as well as the mylohyoid M, and from where does this nerve come
nerve to the mylohyoid

inferior alveolar N is a branch of V3

just before the inferior alveolar dives into the mandible it gives of the nerve to mylohyoid, which runs medial to the mandible
the superior ramus of the ansa cervicalis sends out branches to which muscles?
omohyoid (superior belly), sternohyoid, sternothyoid M's
the inferior ramus of the ansa cervicalis sends out branches to which muscles?
only one!

the inferior belly of the omohyoid M
which muscles are the ONLY abductors of the vocal folds?
posterior cricoarytenoid M's
which four muscles are responsible for adduction of the vocal folds?
think LOTT

Lateral Cricoarytenoid
Oblique Arytenoid
Transverse Arytenoid
Thyroarytenoid
Explain the afferent and efferent innervations involved in the gag reflex
The Glossopharyngeal provides the afferent (sensory) route, while the Vagus provides the efferent (motor) route
Pterygopalatine Fossa
- medial openeing
Sphenopalatine foramen
Pterygopalatine Fossa
- lateral opening
Pterygomaxillary fissure
Pterygopalatine Fossa
- anterior opening
Inferior Orbital fissure
Pterygopalatine Fossa
- posterior opening
Foramen rotundum, Pterygoid canal
Pterygopalatine Fossa
- inferior opening
Palatine canal
how do you distinguish b/t a facial or a trigeminal nerve lesion in a corneal blink reflex test?
If you touch the eye and there is no blink reflex at all then it is a trigeminal nerve lesion in that eye.

If you touch the eye and there is a blink reflex in the opposite eye then you have a facial nerve lesion.
what two things traverse the foramen ovale?
mandibular div of CN V, accessory meningeal A
what nerve innervates the intrinsic muscles of the tongue?
hypoglossal N
Name the parasympathetic components of the divisions of CN V
there are none
what air sinus is located inferior to the pituitary gland?
sphenoid sinus
what major nerve is found in the posterior triangle of the neck?
spinal accessory N (CN XI)
piriform recess
- where located?
lateral to the aryepiglottic folds
what is the rule of three addition for the mandibular division of CN V?
the mandibular division of CN V innervates the muscles of mastication as well as the mylohyoid, the anterior belly of the digastric, and the tensors
what emerges from the skull through the petrotympanic fissure?
chorda tympani N
what is the main lateral stabilizer of the TMJ?
temporomandibular L
what attaches onto the lingula of the mandible?
the sphenomandibular L
what is the most important stabilizer of the TMJ?
joint capsule
what structures are vulnerable to trauma to the TMJ?
auriculotemporal N, maxillary A, middle meningeal A
what nerve senses if you bite your tongue?
lingual N
what makes the diagstric M unique with regards to innervation?
the two bellies are innervated by different cranial nerves

anterior belly - mylohyoid N, a branch of V3

posterior belly - facial N
what is the only branch of the trigeminal N that contains motor fibers?
mandibular (V3)
location of mandibular block
medial the ramus of mandible

superior to where inferior alveolar N enters mandibular fossa

lateral to sphenomandibular L
where do this sphenomandibular L attach?
to the lingula of the mandible
what are the floor muscles of the posterior triangle of the neck? (sup -> inf)
splenius capitus, levator scapulae, and the post. and middle scalene M's
what fascia covers the parotid gland and condenses to form the stylomandibular L?
deep cervical fascia
what innervates the geniohyoid M?
C1 fibers from the ansa cervicalis

Deck Info

70

permalink