External structures of the brain Flashcards
What do the Inferior posterior cerebellar arteries supply
Cerebellum and vermis
What do the inferior anterior cerebellar arteries supply
Middle cerebral peduncles
Lower lateral pons, anteroinferior surface of cerebellum
Flocculi
Choroid plexus of lateral ventricle
What does basilar artery supply
Cranial meninges
Cerebellum
What do the superior cerebellar aa supply
`whole superior surface of cerebellar hemispheres
Most of cerebellar white matter
What do the Posterior cerebral aa supply
Inferior aspect of cerebral hemisphere and occipital lobe
What do the posterior communicating aa supply
Optic tract
Cerebral peduncles
Internal capsule
Thalamus
What do middle cerebral aa supply
Most of lateral surface of cerebral hemispheres
What do anterior cerebral aa supply
Cerebral hemispheres apart from occipital lobes
What branch of vertebral aa feeds the cerebellum
Inferior posterior cerebellar Artemis
At what point on the brain stem do the two vertebral aa’s join to form the basilar aa
Pons
Whats the territory of the middle cerebral aa
Its a continuation of the middle cerebral aa
Supplies most of lateral surface of cerebral hemispheres
What is the circle of Willis made of
Anterior cerebral aas Anterior communicating cerebral aas Internal carotid aa Posterior communicating aa Superior cerebellar aa
What is the falx cerebri
Infolding which goes between two hemispheres of brain
what are cisterns
What are the cisterns of the brain
Enlarged pockets of CSF created due to separation of arachnoid mater from Pia mater
Cisterna magna
Cisterna pontis
Interpeduncular cistern
Where is the cisterna magna
Between brainstem and cerebellum
Where is the cisterna pontis
Ventral aspect of pons (in front of pons)
Where is the interpeduncular cistern
Between the peduncles
Where do the blood vessels on the surface of the brain run
Subarachnoid space
What is the function of the arachnoid granulations
Allow CSF to re-enter the circulation via the dural venous sinuses
Which cistern is the largest and can be an alternative location from which to access cerebral spinal fluid
Cisterna magna
Which cistern does basilar artery run through
Cisterna pontis
What is the significance of Circle of Willis
Creates an anastomoses so if anterior or posterior circulation is cut off, then the brain can still cope
What branch of the vertebral artery feeds cerebellum
Posterior inferior cerebellar aa
What 3 main arteries supply the cerebellum
Superior cerebellar aa
Anterior inferior cerebellar aa
Posterior inferior cerebellar aa
