Lecture 20- Skull and Cranial Nerves Flashcards
the neurocranium provides attachment for what muscles
neck, pharyngeal and chewing muscles
what three bones form the base of the neurocranium
presphenoid, basiphenoid, pterygoid
what are the three cranial fossae of the skull
rostral (caudal to cribiform plate)
middle (medial to orbital fissure)
caudal (between internal acoustic meatus and jugular foramen)
what does the viscerocranium contain
nasal cavity and dental batter
what is the rostrum viscerocranium composed of
premaxilla, maxilla, palantine, nasal, lacrimal, and portions of fronts and zygomatics
what is the hard palate composed of
premaxilla, maxilla, palantine and contains portions if the upper dental battery
what are nasal chonae
thin scroll like bones covered with respiratory and nasal epithelium
what is the postorbital ligament
forms lateral portion of the orbit
what muscle takes origin off the ventral edge of the zygomatic arch
masseter muscle
what does the mandible contain and where does it articulate
contains the lower dental battery and articulated with temporal at temporomandibular joint
what cranial nerve (s) exit the telecephalon
olfactory
what cranial nerve (s) exit the diencephalon
optic
what cranial nerve (s) exit the mesencephalon
oculomotor and trochlear
what cranial nerve (s) exit the metencephalon
trigeminal
what cranial nerve (s) exit the myelencephalon
abducent, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, hypoglossal
where does the olfactory nerve carry information to
piriform lobe of brain
what does the olfactory nerve travel through
cribiform plate
where does the optic nerve relay information from and to
from the retinal ganglion cells to the lateral geniculate nucleus in the thalamus
what does optic nerve travel through
optic canal
what three nerves innervate extrinsic eye muscles
oculomotor, trochlear and abducens
what muscles does the oculomotor nerve innervate
ventral rectus, dorsal rectus, medial rectus and ventral oblique and levator palpebrae superiosis
what muscle does the trochlear nerve inenrvate
dorsal oblique
what muscle does the abducens nerve innervate
lateral rectus
what nerve provides sensory innervation to the face (pain, temperature, touch)
trigeminal nerve
what are the three divisions of the trigeminal nerve
V1- ophthalmic
V2- maxillary
V3- mandibular
what division of the trigeminal nerve also provides motor innervation to the muscles of mastication and tensor muscles
V3- mandibular
where does V1 ophthalmic nerve exit
orbital fissue
where does V2 maxillary nerve exit
round foramen
where does V3 mandibular nerve exit
oval foramen
what cranial nerve innervates the facial muscles, glands and taste
facial nerve CN VII
what cranial nerve provides parasympathetic innervation to the ptyergopalatine ganglion
facial nerve- CN VII
what are the two exits for the branches of the facial cranial nerve
internal acoustic meatus and stylomastoid foramen
what is the role of the vestibular apparatus
balance and muscle coordination
what is the role of the cochlea
hearing
what nerve innervates the cochlea and vestibular organs
vestibulocochlear CN VIII
where does the vestibulocochlear nerve enter/exit
internal acoustic meatus
what cranial nerve provides motor innervation to the stylopharyngeus muscle
glosspharyngeal- CN IX
what cranial nerve innervates the paraotid gland
glossopharyngeal nerve CN IX
what cranial nerve innervates the taste for posterior 1/3 of the tongue, general sensation, posterior 1/3 of tongue, oropharynx, middle ear, auditory tube, carotid sinus, carotid body
glossopharyngeal nerve CN IX
what cranial nerve provides motor to muscles of the soft palate
vagus nerve- CN X
what cranial nerve supplies PNS to cardiac muscle, viscera to left colic flexure
vagus nerve CN X
what cranial nerve innervates the taste buds around the epiglottis
vagus, CN X
what cranial nerve innervates the several neck and back muscles (brachiceophalicus, omotransversarius, sternocephalicus, and trapezius
accessory CN XI
where do the glossopharyngeal, vagus and accessory nerve pass through
jugular foramen
which cranial nerve innervates instrinsic and extrinsic tongue muscle
hypoglossal CN XII
