Blood Supply to and From CNS Flashcards
Blood supply to the spinal cord arises from what?
What do radicular arteries do?
Travel along dorsal and ventral roots of spinal cord to reach the blood supply. “Radicule” means root
Verterbal arteries are branches of what major artery?
What does it travel through to reach what?
What are the arrows pointing to?
What is this area its going through called?
Vertebral arteries enter the base of the skull through what?
What do they give rise to once they do?
Anterior spinal artery supplies ___ of the spinal cord, including ____ horns, _____horns, ____ and ___ funiculi, ______, _______
The posterior spinal arteries supply the posterior ___ of spinal cord, including:
Where do anterior and posterior spinal arteries not extend? What do we need because of this?
Back up plan is segmental arteries, which provide blood supply to thoracic and lumbar levels
Trace the path of segmental arteries. Where do they arise, what do they branch into, and what do these things anastomose into?
Whats the main function of segmental arteries?
They provide main blood supply to spinal cord at thoracic and lumbar levels
What is the special segmental artery between T5 and L3?
What’s its main job?
The venous drainage of the spinal cord generally follow what pattern?
Blood passes from spinal veins to what?
After blood passes into the epidural internal venous plexus (of Batson), where does it drain?
What is special about the epidural internal venous plexus (of Batson) veins?
They are veins that permit bi-directional flow and serve as path for transmission of inectious agents and tumor cells
What is this?
Epidural internal venous plexus (of Batson)
What percentage of cardiac output goes to the brain?
What are the 2 pairs of vessels that the brain consists of?
What does the internal carotid artery give rise to? 5 things
What does the anterior cerebral artery supply? 3 things (what areas of motor and sensory cortex?)
3rd thing is anterior limb of internal capsule (via medial striate artery (recurrent artery of Heubner)
Middle cerebral artery supplies what?3 things Also what part of motor and sensory cortex?
3rd thing is anterior and posterior limbs of internal capsule (via lenticulostriate arteries)
The middle cerebral artery supplies the ___ and ___ limbs of the internal capsule via what arteries?
What are these arteries prone to in what disease? Why?
Prone to hypertension because they are so small and long
Vertebral arteries join to form the ___ artery.
Branches of verterbral arteries include what?
The posterior inferior cerebellar artery (PICA) gives rise to what?
The basilar artery branches include: (3) arteries
Posterior cerebral arteries form what branch of the basilar artery?
They provide major blood supply to what region?
Also 3 other structures
What is the circle of Willis?
Formed by what? (5)
Gives off penetrating branches to what structures (3)
What is an aneurysm?
Where do Berry (saccular) aneurysms develop?
Rupture is a common cause of what?
What are watershed zones?
What are superficial veins devoid of? Where do they lie? Where do they drain from? Where do they terminate? Where do they drain to?
What does the laceration of superficial veins result in? How can this happen, and who’s at risk?
Will the sympoms come on quickly or slowly?
subdural hematoma
It can happen when someone, such as an hold person, falls
neurologic symptoms come on slowly over the course of several days
Deep cerebral veins drain what kind of structues?
Anterior cerebral veins and deep middle cerebral veins drain to what?
Basal veins join ___ ___ veins to form ___ ___ of ____
What artery supplies the spinal cord generally?
Branches of the vertebral arteries
What artery supplies the dorsal columns of the spinal cord? (fine touch, vibration, position sense)
Posterior spinal artery
What artery supplies the spinothalamic tract in the spinal cord?
Anterior spinal artery
What artery supplies the medial lemniscus in the medulla?
Anterior spinal artery and paramedian branches of vertebral (switches blood supply because axons from dorsal colum nuclei trael ventral medial as they cross midline)
What artery supplies the spinothalamic tract in the medulla?
PICA and circumferential branches of vertebral (in spinal cord the spinothalamic tract is located ventral lateral but assumes a more dorsal lateral position in the medulla)
Branches of what supply the pons, generally?
Branches of the basilar artery
In the caudal pons, what artery supplies the medial lemniscus?
Paramedian branches of the basilar (although it has moved dorsal in location it maintains a more medial position)
In the caudal pons, what artery supplies the spinothalamic tract?
Circumfrential branches of basilar and AICA (because of more lateral location of this tract)
In the mid to rostral pons, what artery supplies the medial lemniscus?
Oaramedian and circumfrential branches of the basilar (because ML has moved lateral and anatomically closer to the spinothalamic tract)
In mid to rostral pons, what branches supply the spinothalamic tract?
circumferential branches of basilar (because of more lateral location of this tract)
In mid brain, what branches generally supply this are?
Branches of the top of the basilar and proximal posterior cerebral arteries
In midbrain, what arteries supply medial lemniscus and spinothalamic tract?
circumferential branches of the proximal posterior cerebral (because these pathwasy have moved more dorsal lateral)
What does the posterior inferior cerebellar artery (PICA) give rise to? Also what does it supply blood to?
Gives rise to the posterior spinal artery,
supplies dorsolateral medulla
supplies inferior cerebellum and fourth ventricle, infererior cerebellar peduncle, spinothalamic tract
