Compiled Lab Info Flashcards
The anterior cranial fossa is filled by the
frontal lobes of the cerebral hemispheres
The lateral depressions of the middle cranial fossa are filled by the
temporal lobes of the cerebral hemispheres
The midline depression in the middle cranial fossa is filled by the
pituitary gland
The posterior cranial fossa is filled by what 2 things
brainstem (midline) &
cerebellum (lateral depressions)
What goes through the foramen magnum of the occipital bone
brainstem as it transitions to the spinal cord
vertebral arteries
CN XI
the _______ part of the occipital bone supports the pons and medulla regions of the brainstem
basilar
the ________ artery travels along its internal surface
basilar
the occipital condyles articulate with the
C1 vertebra
External landmark that closely approximates the location of the confluence of the sinuses
External occipital protuberance
Confluence of sinuses
overlies this landmark
Internal occipital protuberance
Attachment site for the cerebral falx
Internal occipital protuberance
Attachment site for the cerebellar falx
Internal occipital crest
Transmits CN VII and CN
VIII
internal acoustic meatus
What goes through the carotid canal
ICA and postGS fibers traveling on it
Impression along the occipital & temporal bones as the transverse sinus runs in the attached edge of the cerebellar tentorium
Groove for the transverse sinus
Impression along the temporal & occipital bones as the sigmoid sinus runs toward the jugular foramen
Groove for the sigmoid sinus
Lies in between the petrous ridge of the temporal bone and the occipital bone
Jugular foramen
Internal jugular vein begins here & receives direct drainage from the sigmoid & inferior petrosal sinuses
jugular foramen
The __________ is filled by the pituitary gland and covered by the sellar diaphragm
hypohyseal fossa
Attachment of the cerebellar tentorium
posterior clinoid processes
Transmits the middle meningeal artery
foramen spinosum
Attachment of the cerebellar tentorium
Anterior clinoid process
the superior orbital fissure transmits what 5 things
CN III
CN IV
CN V1
CN VI
ophthalmic veins
Transmits CN II and the ophthalmic artery
optic canal
By birth, this opening is covered by cartilage and is not continuous into the middle cranial fossa
foramen lacerum
Attachment of the cerebral falx
frontal crest
The olfactory bulb is composed of the _______ for smell
2nd-order neurons
The optic nerves are composed of the axons of the _______ cells
retinal ganglion cells
CN III travels along the ________ of the cavernous sinus
lateral wall
CN III is composed of __________ fibers to almost all of the extra-ocular muscles and ________ fibers to the constrictor pupillae & ciliary muscles
somatic motor ; preganglionic parasympathetic
CN IV travels along the ________ of the cavernous sinus
lateral wall
CN IV is composed of _________ fibers to the
_________ muscle
somatic motor ; superior oblique
Trigeminal ganglion is composed of _________ located on the floor of the middle cranial fossa
1st order somatic sensory CBs
CN V1 passes anteriorly through the ______ of the cavernous sinus
lateral wall
CN V1 is composed of ________ of 1st order cell bodies located in the trigeminal ganglion
peripheral (distal) processes
CN V1 carry sensations from the
cornea
skin of forehead
anterior scalp
eyelids
frontal sinus
sphenoid sinus
mucosa of anteriorsuperior aspect of the nasal cavity
CN V2 is composed of ________ of 1st order cell bodies located in the trigeminal ganglion
peripheral (distal) processes
CN V2 carry sensations from the
skin of the face over the maxilla
upper lip
maxillary teeth & gingiva
mucosa of nasal cavity
nasopharynx
maxillary sinuses
palate
V3 does _____ pass through the cavernous sinus
not
CN V3 is composed of _______ fibers to what muscles
Somatic motor ; muscles of mastication and pharyngeal arch 1 muscles
CN V3 has peripheral (distal) processes of _______ cell bodies located in the _______
1st order ; trigeminal ganglion
V3 fibers carry sensation from
skin of face over the mandible (except the angle) lower lip
mandibular teeth & gingiva TMJ
mucosa of oral cavity
anterior 2/3rds of the tongue
CN VI is composed of _________ fibers to the _________ muscle
somatic motor ; lateral rectus
CN VII is composed of _________ fibers that supply the muscles of ________ and pharyngeal arch __
somatic motor ; facial
expression ; 3
CN VII are composed of ________ fibers to most of the
major glands of the head
Preganglionic parasympathetic
CN IX has special sensory fibers for taste from the
posterior tongue
CN IX has ______ fibers to the parotid gland
Preganglionic parasympathetic
CN XI is composed of ___________ fibers to the _______ and ______ muscles
somatic motor ; SCM ; trapezius
Attachment site of temporalis muscle
Coronoid process
Nerve and artery to masseter emerge here to reach the
masseter muscle
Mandibular notch
Site of attachment of the medial and lateral pterygoid muscles
lateral pterygoid plate
the pterygoid fossa is filled by the muscle belly of the _______ muscle
medial pterygoid
the spine of the sphenoid is the attachment site for the
sphenomandibular ligament
the pterygomaxillary fissure transmits the _____ artery and ____ nerves
maxillary artery
PSA nerves
the chorda tympani nerve from CN VII courses through the
petrotympanic fissure
what is the attachment site for the temporalis muscle
coronoid process
the nerve and artery to masseter emerge where to reach the masseter muscle
mandibular notch
what is one of the attachment sites for the lateral pterygoid muscle
pterygoid fovea
what is the attachment site for the masseter and medial pterygoid muscle
angle of mandible
what transmits the inferior alveolar nerve and artery
mandibular foramen
CN VI passes anterior within the _____ of the cavernous sinus along the lateral aspect of the ____________ and then enters the superior orbital fissure
middle ; internal carotid artery
the superior division of CN III pierces the deep aspect of the _________ and then passes to the ___________
superior rectus ; levator palpebrae superioris
