Struggling with Flashcards
The neurocranium contains
- brain
- meninges
- vasculature
- cranial nerves
what are the 3 singular visocranium bones
mandible, vomer, ethmoid
sphenoid bone articulates with…
frontal
temporal
occipital
ethmoid
zygomatic
parietal
palatine
vomer
bones contributing to the orbit
frontal
palatine
ethmoid
lacrimal
sphenoid
maxilla
zygomatic
location of common tendinous ring
covers optic canal and portion of superior orbital fissure
what muscle elevates the superior eyelid (SPELLING COUNTS)
levator palpebrae superioris
Inferior oblique origin
orbital surface of maxilla
levator palpebrae superioris origin
lesser wing of sphenoid bone
temporal fossa location
depressed area on the side of the head. superior to the infratemporal fossa and starts at inferior temporal line
aspects making up the infratemporal fossa
ramus of mandible
maxilla
lateral pterygoid plate
inferior surface of greater wing and squamus portion
mastoid and styloid processes
lateral pterygoid muscle (superior head) origin
greater wing of sphenoid bone
lateral pterygoid muscles acting together allow for
protrusion of the mandible
action of temporalis
elevate and retract
medial pterygoid Ms. superficial head origin
tuberosity of maxilla
lateral sulcus is the
inferior to parietal and frontal to partially devide from temporal and occipital
the central sulcus is
seperates the frontal and parietal lobes
longitudinal cerebral fissure
separates the brain into 2 hemispheres
how does the brainstem occupy the cranial fossas
midbrain lies in junction of middle and posterior cranial fossas
the pons is in the anterior portion of the posterior cranial fossa
explain how the nasal cavity is separated
1/3 = olfactory area
2/3 = respiratory area
what is the olfactory nerve in contact with
the inferior/orbital surface of the frontal lobe
where does cranial nerve III emerge from
oculomotor emerges from the midbrain
what are the 2 intra ocular muscles
sphincter pupillae muscle
ciliary muscle
what type of information does the oculomotor carry
parasympathetic to the sphincter pupillae
where does cranial nerve IV emerge from
posterior surface of midbrain
where does cranial nerve VI emerge from
brain stem between pons and medulla
2 purposes of cranial nerve V and what each does/gives
sensory = face, oral, nasal, sinus mucosa, teeth and tongue
motor = muscles of mastication and 4 accessory muscles
where does cranial nerve V emerge from
lateral aspect of pons
2 layers of dura mater
periosteal and meningeal
what are the arachnoid granulations
outward bulges of dura mater (transfers CSF to venous system) since its arachnoid matter that protrudes through the meningeal layer into the dural sinus
where do the internal carotid arteries arise from
common carotid arteries and pass through the external opening of the carotid canal and internal opening within the petrous portion of the temporal bone
from inferior to superior the ICA path/divisions
cervical to petrous to cavernous then the ICA becomes intra dural as the cerebral
what do vertebral arteries arise from
subclavian arteries that passthrough C1-C6 transverse foramen to enter the cranium via the forman magnum
CN V3 gets sensation from
- mucosa of mouth
- skin over mandible
- 2/3 of tongue
- mandibular teeth
- side of head
-tempromandibular joint - lower lip
what is the branch off V3 that goes in the opposite direction
auriculotemporal nerve
what nerve travels through the mandibular and mental foramen
infra alveolar nerve
what does V1 get sensation from
forehead
superior eyelid
muscosa of nasal cavity and sinuses
nose
scalp
cornea
what does V2 get sensation from
inferior eyelid
maxillary teeth
skin over maxilla
upper lip
palate
muscosa of nose
maxillary sinuses
what branches off the anterior ethmoidal nerve
external nasal nerve
what does the infraorbital nerve travel through
first the infra orbital fissure
the the infra orbital groove and canal
then finally the infra orbital foramen
