Lab Quiz 3 Flashcards
tophat chapter 5 and week 4 lecture (8 cards)
where are the posterior circulation to the brainstem and cerebellum located?
basilar artery: unilateral artery that lies on the front of the pons
posterior cerebral artery: uppermost branch off of the basilar artery
superior cerebellar artery: second highest branch off of basilar artery, under the posterior cerebral artery
anterior inferior cerebellar artery: located at the bottom of the pons located to the cerebellum
vertebral artery: lateral branches off of basilar artery on the medulla
posterior inferior cerebellar artery: branches off of the vertebral artery
anterior spinal artery: branches off of the vertebral artery below the posterior inferior cerebellar artery
(diagram on lab lecture slide 6 and in tophat chapter 5)
what are the arteries of the circle of willis?
vertebral artery: v-shaped branches on the medulla
basilar artery: unilateral artery that leads into the circle
posterior cerebral artery: lateral branches from the bottom of the circle
posterior communicating artery: arteries that make up the bottom half of the circle
middle cerebral artery: lateral branches that lie in the center of the circle, outside of the circle
internal carotid artery: medial branches that lie in the center of the circle, inside the circle
anterior cerebral artery: makes up the top of the circle and branches leading up vertically from the circle
anterior communicating artery: connecting point between the vertical branches leading off the top of the circle of willis
(diagram on lab lecture slide 8)
where are the dural venous sinuses located on an angiogram?
superior sagittal sinus: lies along the top of the cortex
confluence of sinuses: lies on the back of the skull, separates the superior sagittal sinus from the transverse sinus
transverse sinus: lies on the bottom of the occipital lobe
sigmoid sinus: S-shaped sinus below the transverse sinus
straight sinus: branch off of the confluence of sinuses that extends into the midbrain
(diagram on tophat chapter 5)
where are the dural venous sinuses located on a specimen?
superior sagittal sinus: located where the cranial dura mater fuses superior to the falx cerebri
arachnoid granulations: nodules that lie along the midline
straight sinus: located at the junction of the falx cerebri and tentorium cerebelli
confluence of sinuses: in the tentorium cerebelli at the tip of the cerebellum
(diagram in tophat chapter 5)
what are the ventricles of the brain?
anterior horn of the LV: lies above the forehead of the seahorse
body of LV: main area above the third ventricle
atrium of LV: main triangular on the back of the seahorses head
posterior horn of the LV: point that branches off of the atrium
inferior horn of the LV: lies underneath the third ventricle
third ventricle: where eye of the seahorse is
fourth ventricle: triangle on the back of the brainstem in front of the cerebellum
central canal: canal on the middle of the medulla
interventricular foramen: connects the lateral ventricles and the third ventricle (runs from anterior horn of LV to third ventricle)
(diagram on tophat chapter 5)
where are the ventricles as seen from a coronal section?
body of lateral ventricle: main ventricles in center of slice
inferior horn of lateral ventricles: lies on the bottom of the temporal lobes
third ventricle: thin central ventricle below body of lateral ventricle
(diagram on tophat chapter 5)
where are the cisterns located on axial MRIs?
interpeduncular cistern: lies in front of brain stem
inferior horn of lateral ventricle: white mark on either side of interpeduncular cistern
cisterna magna: white space surrounding brain stem on base of skull
(diagram on tophat chapter 5)
where are the cisterns located on a sagittal sheep brain MRI?
cisterna magna: lies below the cerebellum
medullary cistern: lies in front of the medulla
pontine cistern: lies in front of the pons
posterior (pineal) cistern: lies above the cerbellum behind the occipital lobe
(diagram on tophat chapter 5)
