Skull/Cranial Cavity Flashcards
What two parts is the cranium divided into?
- Neurocranium (bony casing of the brain)
- Visocranium (facial bones)
What are the two subdivisions of the Neurocranium?
- Calvaria (superior)
- Cranial base (inferior)
What is the name of CN I? What is its function?
Olfactory
-Smell
What is the name of CN II? What is its function?
Optic
-Vision
What is the name of CN III? What is its function?
Oculomotor
-Eye movement
What is the name of CN IV? What is its function?
Trochlear
-Eye Movement
What is the name of CN V? What is its function?
Trigeminal
- Mandible movement
- Face sensory
What is the name of CN VI? What is its function?
Abducens
-Eye movement
What is the name of CN VII? What is its function?
Facial
- face movement
- anterior 2/3 of tongue taste/sensation
What is the name of CN VIII? What is its function?
Vestibulocochlear
-Hearing/balance
What is the name of CN IX? What is its function?
Glossopharyngeal
- pharynx movement
- Posterior 1/3 of tongue and pharynx Taste/sensation
What is the name of CN X? What is its function?
Vagus
-Motor & sensory: pharynx, larynx, esophagus, cardiac etc
What is the name of CN XI? What is its function?
Accessory
-Head and shoulders movement
What is the name of CN XII? What is its function?
Hypoglossal
-tongue movement
What are the two layers of the Dura mater?
- periosteal
- internal meningeal
Which cranial nerves contain presynaptic parasympathetic axons?
III
VII
IX
X
Which layer of the Dura continues along the spinal cord?
Internal meningeal
Describe the pathway of CN XI in the skull.
- enters from spinal cord via foramen magnum
- leaves skull with CN IX & X via the Jugular Foramen
Through which dural infolding does the infundibular stalk of the hypothalamus pass?
Diaphragma sellae
Is an extradural hemorrhage arterial or venous in origin?
Arterial
Is a Subdural hemorrhage arterial or venous in origin?
venous
Is a subarachnoid hemorrhage arterial or venous in origin?
Arterial
Which nerves exit the skull through the Superior orbital fissure?
III
IV
V-1
VI
Which nerves exit the skull through the foramen rotundum?
V2
Which nerves exit the skull through the foramen ovale?
V3
Which nerves exit the skull cavity through the internal auditory meatus?
VII
VIII
Which nerves exit the skull through the jugular foramen?
IX
X
XI
What passes through the foramen spinosum?
Middle meningeal artery
Through what opening does CNXII exit the cranial cavity?
Hypoglossal Canal
What structure separates the occipital lobe from the cerebellum?
Tentorium Cerebelli
What structure separates the cerebrum into two hemispheres?
Falx Cerebri
What structure divides the cerebellum into right and left halves?
-Falx cerebelli
What structure divides the hypothalamus from and the pituitary?
-Diaphragma sellae
Is a subdural hemorrhage usually arterial or venous in origin?
-Venous
Is an epiduralhemorrhage usually arterial or venous in origin?
Arterial
Is a subarachnoidhemorrhage usually arterial or venous in origin?
Arterial
aneurysm
