Flashcards in Circulation of CNS Deck (25):
there is a dense network of vessels in the brain meant to maintain consistent perfusion, even throughout fluctuations in mean arterial blood pressure. Which part of the brain has the highest metabolic demand? Why?
Where all the cell bodies are located.
the circle of willis is formed by the anastamoses of the [...] arterial system and the [..] arterial system
the internal carotid artery is a branch of the [....], it ascends through the skull base via the [....]. It runs an s-shaped route and emerges lateral to the [....] to join the circle of willis anastamoses.
common carotid artery
the vertebral artery is a branch of the [....] artery. It travels up the vertebrae through the [.....] and enters the cranial cavity via the [.....]. It forms the [....] artery and supplies the [...] aspect of the circle of willis.
The internal carotid artery branches into the [....]. The bilateral anterior cerebral arteries are bridged by the [.....], completing the anterior aspect of the circle of willis.
anterior cerebral artery and the middle cerebral artery.
anterior communicating artery.
the posterior communicating artery bridges the [...] with the [....].
internal carotid arteries
posterior cerebral arteries
the [...] unite to form the basilar artery, the basilar then terminates to form two [....].
posterior cerebral arteries
the anterior cerebral artery supplies the [.....] portion of the [......] and [....] lobes.
Territories include motor and sensory cortices for the [....].
The ACA runs along the [....] fissure.
frontal and parietal lobes
the middle cerebral artery supplies the [...] aspect of the brain, including parts of the [.....].
Territories include motor and sensory for most of the body, except for [.....]. Also [......] association areas, and [.....] areas on the dominant side.
the middle cerebral artery runs along the [....] sulcus.
frontal, parietal, temporal, occipital lobes and the insula
the lower limb.
the posterior cerebral arteries supply the [.....] aspects of the [....] lobes.
Territories include the [....] cortex.
medial and inferior.
temporal and occipital.
pontine branches off the [....] artery service the [....] aspect of the pons.
[...] branch off the middle cerebral artery to service the basal ganglia and [....].
lenticulostriate arteries. (remember "lenticulo"=lentiform nucleus (globus pallidus and putamen of basal ganglia).
before the internal carotid artery branches in the middle and anterior cerebral artery, it sends off the [.....], which supplies the ocular orbit, as well as the [.....] and scalp.
top of the nasal cavity.
another branch of the ICA, the [....] artery, supplies structures deep in the lateral hemisphere including the [.....] .
Often involves in damage to the visual system via it's supply to the optic tract.
anterior choroidal artery.
optic tract, lateral ventricles, and hippocampus.
***Often involved in damage to the visual system via it's supply to the optic tract.
the vertebro-basilar artery system gives off many branches before becoming the posterior cerebral arteries.
1st, vertebral artery gives off a branch, the [.....].
After uniting with other vertebral arteries to form the basilar artery, it gives off a branch, the [....].
As it moves rostrally and gives off small pontine branches, just before it terminates as the posterior cerebral artery, it branches into the [....]
posterior inferior cerebellar artery.
anterior inferior cerebellar artery.
superior cerebellar artery.
which parts of the vertebro-basilar arterial system are in the midbrain?
basilar artery comes up and branches into the posterior cerebral arteries, these project to the occipital lobe branching towards the back end of the midbrain.
which parts of the vertebro-basilar arterial system are in the pons?
the pons has the basilar artery with pontine branches (paramedian, short circumferential, long circumferential)
which parts of the vertebro-basilar arterial system are in the medulla?
anterior spinal artery runs in the midline.
vertebral artery running posterolateral.
posterior inferior cerebellar artery running around backend of medulla en route to the cerebellum (gives off branches for posterolateral aspect of medulla).
the anterior spinal artery is the blood vessel that supplies the [.....]. It arises from branches of the [...] arteries and courses along the [....] aspect of the spinal cord.
anterior portion of the spinal cord
*essentially supplies all of ventral horn and ventral tract
[.....] is a cerebral vascular accident associated with the anterior spinal artery.
It's impact includes:
1) the [....] nucleus, with damage causing ipsilateral paralysis and and atrophy of the tongue. (LMN)
2) the [....], with damage causing a contralateral somatosensory deficit.
3) the [....] tract running through the medullary pyramids, with damage causing contralateral hemiparesis (UPM).
medial medullary syndrome
[.....] is a cerebral vascular accident associated with the posterior inferior cerebellar artery.
It's impact includes:
1) [...], causing ipsilateral deficits in pain and temperature over the face
2) [....], causing ipsilateral ataxia and in-coordination
3) [...], causing dysarthria, dysphagia, and decreased gag
Lateral medullary syndrome
1)spinal trigeminal nucleus
2)inferior cerebellar peduncles
the posterior spinal arteries run along the [...] aspect of the spinal cord, and are each formed directly from a single branch of the [....] running posteriorly.. These supply most of the [....].
dorsal horn and dorsal funiculus (located between dorsal horn and midline)
[....] are communications between the anterior and posterior spinal arteries that service the [....].
cerebral veins run in the [....] space and drain into a series of [....]
sinuses (superior saggital sinus, sigmoid sinus, inferior saggital sinus, straight sinus).