Blood Supply to the Central Nervous System Flashcards
What percentage of cardiac output goes to the brain?
10-20%
What percentage of liver glucose does the brain use?
66%
State the two main sources of blood supply to the brain?
Vertebral arteries (posteriorly) Internal carotid arteries (anteriorly)
State the major artery that the vertebral arteries branch off and describe the path of the vertebral arteries to the brain.
Subclavian artery The vertebral arteries pass through the transverse foramina of the cervical vertebrae and through the foramen magnum into the brain
Draw the circle of Willis.
DO NOT FORGET the superior cerebellar artery and the anterior inferior cerebellar arteries
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State the names of the venous sinuses that are at the top and bottom of the falx cerebri.
Superior sagittal sinus Inferior sagittal sinus
What is the name given to the place where all the sinuses meet?
Confluence of sinuses
What connects the inferior sagittal sinus to the confluence of sinuses?
Straight sinus
What vessel does the inferior sagittal sinus join with to form thestraight sinus?
Great cerebral vein
Which sinus ascends to join the confluence of sinuses?
Occipital sinus
Which two sinuses run along the temporal bone?
Superior petrosal sinus Inferior petrosal sinus
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Which main sinus drains into the internal jugular vein through the jugular foramen?
Sigmoid sinus
Which sinus connects the confluence of sinuses to the sigmoid and superior petrosal sinuses?
Transverse sinus
Which sinus runs along the sphenoid and parietal bones?
Sphenoparietal sinus- it comes off the cavernous sinus
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Which sinuses run on either side of the pituitary stalk?
Anterior and posterior intercavernous sinuses
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