blood supply, meninges, and ventricular system Flashcards
what do the vertebral arteries supply blood to? where does it branch from?
R and L branch from subclavian artery
supplies anterior medulla oblongata
what does PICA supply
inferior part of posterior lobe of cerebellum
what does AICA supply
inferolateral posterior lobe of cerebellum
what does SCA supply
anterior lobe and superior posterior lobe of cerebellum
what is the first branch of the internal carotid artery
opthalmic artery
what does ACA supply
medial frontal and parietal lobe, limbic lobe, lateral superior frontal and parietal lobe
what functions would be impaired with an ACA stroke
contralateral lower limb somatic motor and sensation, emotions
where does aca and mca branch from
internal carotid artery
what does MCA supply
supralateral frontal anf parietal lobe, temporal lobe
what functions would be impaired with a MCA stroke
contralateral trunk, upper limb, and face somatic motor and sensation
hearing
language if L MCA (aphasia)
spacial cognition and emotion if R MCA
what does the PCA supply
inferior temporal and occipital lobe
what functions would be impaired with a PCA stroke
memory and contralateral visual field
arteries that form the circle of willis
anterior communicating (1)
antereal cerebral artery (2)
internal carotid (2)
posterior communicating artery (2)
Posterior cerebellar artery (2)
what structure are inside the circle of willis
hypothalamus and pituitary gland
what is the basal nuclei supplied by
lateral striate a. (branch form MCA)
hemorrhagic and ischemic stroke
hemorrhagic- disruption of blood vessels (13%)
ischemic- blockage of blood supply (87%)
the folding of the meningeal layer of the dura mater in the SAGITTAL plane creates what
falx cerebri: longitudinal fissure
falc cerebelli: posterior cerebellum
the folding of the meningeal layer of the dura matter in the TRANSVERSE plane creates what
tentorium cerebelli: transverse fissure
diaphragma sellae: pituiratry gland
which sinuses run between the periosteal and meningeal dura mater
superior sagittal sinus, occipital sinus, transverse sinus, sigmoid sinus
which sinuses are in the folded meningeal dura mater
inferior sagittal sinus, straight sinus
what is the pathway of venous drainage
deep brain vein
great cerebral vein and inferior sagittal sinus
straight sinus
occipital sinus and superior sagittal sinus
confluence of sinus
transverse sinus
sigmoid sinus
cavernous sinus
internal jugular vein
what is known as the dangerous triangle? why?
cavernous sinus- emissary veins
it can spread infection from CSF to the brain
where is the interventricular foramen (foramen of monro)
3rd ventricle
where is the cerebral aqueduct
4th ventricle
circulation of CSF
lateral ventricles
3rd ventricle
4th ventricle
out of the ventricular system
reabsorbed into venous sinus blood
injury to the meningeal artery (pterion), bleeding, convex on ct scan, loss of consciousness
epidural hematoma
disruption of bridging veins, concave on CT scan, herniation of brain structures
subdural hematoma
disruption of blood vessels, hematoma in CSF, diffusion on CT scan, increased intracranial pressure
subarachnoid hematoma
