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176 Cards in this Set

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  • Back
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What is the one thing that our brain depend on
Our brain depends on O2
What is the main way that the brain gets it’s O2
From the blood
How long does it take to lose consciousness w/out O2 blood
10 sec
How long does it take before all electrical activity stops
20sec
What is the capillary density in the brain
Brain has very high capillary density
Does gray matter have more caps or white
Gray
What is the major vessel that supplies the brain with blood
Internal Carotid and vertebral aa. , all the vessels that carry blood to the brain branch off it
Who does the posterior blood supply of the brain
vertebral
When the 2 vertebral aa . come together, what vessel do the form
Basillar a.
How is circle of willis formed
It is formed by the blood supply from the anterior i.e. Internal carotid and posterior i.e. vertebral aa., it is known as the continuous circle of blood
What is the main function of circle of willis
It provides a continuous flow of blood from the anterior and the posterior surfaces of the brain
How are discrete regions of the brain get blood
They get blood from the brr. of the internal carotid and basilar arteries
How are the ant and post circulation connected
They are connected via ant and post communicating arteries
What is an arterial aneurysm
An aneurysm is a balloon like structure that form due to obstruction of blood flow through different vessels of the brain
Where are the aneurysm most likely to take place
They usually happen near the bifurcation of the vessels
What are potential problems with aneurysm
2 types:
What is the role of paracentral lobule
Para central lobule is responsible for sensory and motor info to the leg and foots
What is the blood supply to the paracentral lobule
Anterior cerebral a.
What other region does the anterior cerebral supply
It supplies the anterior 2/3 of the medial surface of the hemisphere
What is the path that ant. cerebral takes along the brain
-it appears at the subarachnoid space and anterior to the hypothalamus→ then upward and around the genu of corpus collosum→ while giving brr.
Where is the visual cortex located
Located in the cerebellum at the occipital lobe
What is the blood supply to the visual cortex
Posterior cerebral
What areas of the brain are supplied by the post cereberal a.
-occipital lobe
What is the blood supply to the middle portion of the brain
Anterior cerebral
What is the posterior supply of the brain
Posterior cerebral
What is the lateral surface of the bran supplied by
Middle cerebral
What is blood supply to the eye
Ophthalmic artery that comes from internal carotid
What is the foramen that the MCA enters and exits through
Sylvian fissure
What areas are supplied by the MCA
It includes the face and arm sensorimotor cortex
What are the two major branches of the MCA
MCA superior and MCA inferior division,
What does each supply and what happens if they are occludes
Sup=does superior part of the lateral surface of the brain, speech
What is the deep branches o the MCA called
They are called lentriculostriate aa.
What area is supplied by the lentriculostriate aa
These arteries supply the region of diencephalon where internal capsule is located
What is the role of internal capsule
It supplies the upper motor neuron
Is it common to see stroke in lentriculostriate aa
Yes
What happens if there is a stroke in the middle stem of the MCA
It MCA stem Is knocked out, then the blood won’t flow to the brr. of MCA→ to all area dying where the blood goes, so we would lose the upper motor neuron
In w/c vessel does the infarct happen most frequently
MCA
What if there was a stroke in the left MCA superior division
-would have weakness on the right side
What happens if there is a right stem infarct**
-Everything on the left side will be knocked out
What happens if there is an infarct in the ACA
-contra lateral weakness= if it is on the right side, then weakness is on the left side to the lower extremity b/c it supplies the ant 2/3 of the middle hemisphere of the brain and that’s where paracentral lobule is located
What is the main problem associated with posterior cerebral a. infarct
The blood supply to the visual cortex would be knocked out
What is contra lateral hemianopia
It is the loss of PCA due to a stroke or an infarct
What happens if the infarct was to occur at he junction of area that’s supplied by the 2 major vessels
These region between ACA –MCA and MCA-PCA are called “watersheds”, a stroke here would cause extremely low blood pressure for the both vessels and that would compromise all the area that these vessels supply
What would happen if there was an infarct in the Internal carotid
It would significantly lower the amount of blood going to the ACA and MCA
What is the area most severely effected by a watershed infarct
That would be the area b/t the 2 vessels b/c it depends on both of the vessels for it’s perfusion
What does PICA supply
Medulla and cerebellum
What does AICA supply
Pons and cerebellum
What does SCA supply
Midbrain and the cerebellum
What does anterior spinal artery supply
Part of medulla
What vessels supply cerebellum
PICA, SCA,AICA
What is the major blood supply of the spinal chord
Ant and post spinal
What happens if the posterior spinal is knocked out
We lose sensory function since it supplies the dorsal or alar region of the spinal chord
What would happen if the anterior spinal a. is knocked out
We lose the blood supply to the ventral or basal side of the spinal chord and therefore lose all the lower motor neurons
What is the venous drainage of the CNS
-drainage happens through the superior sagittal sinus, cavernous sinus, and great vein of the Galen
What is the one thing that our brain depend on
Our brain depends on O2
What is the main way that the brain gets it’s O2
From the blood
How long does it take to lose consciousness w/out O2 blood
10 sec
How long does it take before all electrical activity stops
20sec
What is the capillary density in the brain
Brain has very high capillary density
Does gray matter have more caps or white
Gray
What is the major vessel that supplies the brain with blood
Internal Carotid and vertebral aa. , all the vessels that carry blood to the brain branch off it
Who does the posterior blood supply of the brain
vertebral
When the 2 vertebral aa . come together, what vessel do the form
Basillar a.
How is circle of willis formed
It is formed by the blood supply from the anterior i.e. Internal carotid and posterior i.e. vertebral aa., it is known as the continuous circle of blood
What is the main function of circle of willis
It provides a continuous flow of blood from the anterior and the posterior surfaces of the brain
How are discrete regions of the brain get blood
They get blood from the brr. of the internal carotid and basilar arteries
How are the ant and post circulation connected
They are connected via ant and post communicating arteries
What is an arterial aneurysm
An aneurysm is a balloon like structure that form due to obstruction of blood flow through different vessels of the brain
Where are the aneurysm most likely to take place
They usually happen near the bifurcation of the vessels
What are potential problems with aneurysm
2 types:
What is the role of paracentral lobule
Para central lobule is responsible for sensory and motor info to the leg and foots
What is the blood supply to the paracentral lobule
Anterior cerebral a.
What other region does the anterior cerebral supply
It supplies the anterior 2/3 of the medial surface of the hemisphere
What is the path that ant. cerebral takes along the brain
it appears at the subarachnoid space and anterior to the hypothalamus→ then upward and around the genu of corpus collosum→ while giving brr.
Where is the visual cortex located
Located in the cerebellum at the occipital lobe
What is the blood supply to the visual cortex
Posterior cerebral
What areas of the brain are supplied by the post cereberal a.
occipital lobe
What is the blood supply to the middle portion of the brain
Anterior cerebral
What is the posterior supply of the brain
Posterior cerebral
What is the lateral surface of the bran supplied by
Middle cerebral
What is blood supply to the eye
Ophthalmic artery that comes from internal carotid
What is the foramen that the MCA enters and exits through
Sylvian fissure
What areas are supplied by the MCA
It includes the face and arm sensorimotor cortex
What are the two major branches of the MCA
MCA superior and MCA inferior division,
What does each supply and what happens if they are occludes
Sup does superior part of the lateral surface of the brain, speech
What is the deep branches o the MCA called
They are called lentriculostriate aa.
What area is supplied by the lentriculostriate aa
These arteries supply the region of diencephalon where internal capsule is located
What is the role of internal capsule
It supplies the upper motor neuron
Is it common to see stroke in lentriculostriate aa
Yes
What happens if there is a stroke in the middle stem of the MCA
It MCA stem Is knocked out, then the blood won’t flow to the brr. of MCA→ to all area dying where the blood goes, so we would lose the upper motor neuron
In w/c vessel does the infarct happen most frequently
MCA
What if there was a stroke in the left MCA superior division
would have weakness on the right side
What happens if there is a right stem infarct**
Everything on the left side will be knocked out
What happens if there is an infarct in the ACA
contra lateral weakness= if it is on the right side, then weakness is on the left side to the lower extremity b/c it supplies the ant 2/3 of the middle hemisphere of the brain and that’s where paracentral lobule is located
What is the main problem associated with posterior cerebral a. infarct
The blood supply to the visual cortex would be knocked out
What is contra lateral hemianopia
It is the loss of PCA due to a stroke or an infarct,right will cause left
None
What happens if the infarct was to occur at he junction of area that’s supplied by the 2 major vessels
These region between ACA –MCA and MCA-PCA are called “watersheds”, a stroke here would cause extremely low blood pressure for the both vessels and that would compromise all the area that these vessels supply
What would happen if there was an infarct in the Internal carotid
It would significantly lower the amount of blood going to the ACA and MCA
What is the area most severely effected by a watershed infarct
That would be the area b/t the 2 vessels b/c it depends on both of the vessels for it’s perfusion
What does PICA supply
Medulla and cerebellum
What does AICA supply
Pons and cerebellum
What does SCA supply
Midbrain and the cerebellum
What does anterior spinal artery supply
Part of medulla
What vessels supply cerebellum
PICA, SCA,AICA
What is the major blood supply of the spinal chord
Ant and post spinal
What happens if the posterior spinal is knocked out
We lose sensory function since it supplies the dorsal or alar region of the spinal chord
What would happen if the anterior spinal a. is knocked out
We lose the blood supply to the ventral or basal side of the spinal chord and therefore lose all the lower motor neurons
What is the venous drainage of the CNS
drainage happens through the superior sagittal sinus, cavernous sinus, and great vein of the Galen
What is the one thing that our brain depend on
Our brain depends on O2
What is the main way that the brain gets it’s O2
From the blood
How long does it take to lose consciousness w/out O2 blood
10 sec
How long does it take before all electrical activity stops
20sec
What is the capillary density in the brain
Brain has very high capillary density
Does gray matter have more caps or white
Gray
What is the major vessel that supplies the brain with blood
Internal Carotid and vertebral aa. , all the vessels that carry blood to the brain branch off it
Who does the posterior blood supply of the brain
vertebral
When the 2 vertebral aa . come together, what vessel do the form
Basillar a.
How is circle of willis formed
It is formed by the blood supply from the anterior i.e. Internal carotid and posterior i.e. vertebral aa., it is known as the continuous circle of blood
What is the main function of circle of willis
It provides a continuous flow of blood from the anterior and the posterior surfaces of the brain
How are discrete regions of the brain get blood
They get blood from the brr. of the internal carotid and basilar arteries
How are the ant and post circulation connected
They are connected via ant and post communicating arteries
What is an arterial aneurysm
An aneurysm is a balloon like structure that form due to obstruction of blood flow through different vessels of the brain
Where are the aneurysm most likely to take place
They usually happen near the bifurcation of the vessels
What are potential problems with aneurysm
2 types:
What is the role of paracentral lobule
Para central lobule is responsible for sensory and motor info to the leg and foots
What is the blood supply to the paracentral lobule
Anterior cerebral a.
What other region does the anterior cerebral supply
It supplies the anterior 2/3 of the medial surface of the hemisphere
What is the path that ant. cerebral takes along the brain
it appears at the subarachnoid space and anterior to the hypothalamus→ then upward and around the genu of corpus collosum→ while giving brr.
Where is the visual cortex located
Located in the cerebellum at the occipital lobe
What is the blood supply to the visual cortex
Posterior cerebral
What areas of the brain are supplied by the post cereberal a.
occipital lobe
What is the blood supply to the middle portion of the brain
Anterior cerebral
What is the posterior supply of the brain
Posterior cerebral
What is the lateral surface of the bran supplied by
Middle cerebral
What is blood supply to the eye
Ophthalmic artery that comes from internal carotid
What is the foramen that the MCA enters and exits through
Sylvian fissure
What areas are supplied by the MCA
It includes the face and arm sensorimotor cortex
What are the two major branches of the MCA
MCA superior and MCA inferior division,
What does each supply and what happens if they are occludes
Sup does superior part of the lateral surface of the brain, speech
What is the deep branches o the MCA called
They are called lentriculostriate aa.
What area is supplied by the lentriculostriate aa
These arteries supply the region of diencephalon where internal capsule is located
What is the role of internal capsule
It supplies the upper motor neuron
Is it common to see stroke in lentriculostriate aa
Yes
What happens if there is a stroke in the middle stem of the MCA
It MCA stem Is knocked out, then the blood won’t flow to the brr. of MCA→ to all area dying where the blood goes, so we would lose the upper motor neuron
In w/c vessel does the infarct happen most frequently
MCA
What if there was a stroke in the left MCA superior division
would have weakness on the right side
What happens if there is a right stem infarct**
Everything on the left side will be knocked out
What happens if there is an infarct in the ACA
contra lateral weakness= if it is on the right side, then weakness is on the left side to the lower extremity b/c it supplies the ant 2/3 of the middle hemisphere of the brain and that’s where paracentral lobule is located
What is the main problem associated with posterior cerebral a. infarct
The blood supply to the visual cortex would be knocked out
What is contra lateral hemianopia
It is the loss of PCA due to a stroke or an infarct
What happens if the infarct was to occur at he junction of area that’s supplied by the 2 major vessels
These region between ACA –MCA and MCA-PCA are called “watersheds”, a stroke here would cause extremely low blood pressure for the both vessels and that would compromise all the area that these vessels supply
What would happen if there was an infarct in the Internal carotid
It would significantly lower the amount of blood going to the ACA and MCA
What is the area most severely effected by a watershed infarct
That would be the area b/t the 2 vessels b/c it depends on both of the vessels for it’s perfusion
What does PICA supply
Medulla and cerebellum
What does AICA supply
Pons and cerebellum
What does SCA supply
Midbrain and the cerebellum
What does anterior spinal artery supply
Part of medulla
What vessels supply cerebellum
PICA, SCA,AICA
What is the major blood supply of the spinal chord
Ant and post spinal
What happens if the posterior spinal is knocked out
We lose sensory function since it supplies the dorsal or alar region of the spinal chord
What would happen if the anterior spinal a. is knocked out
We lose the blood supply to the ventral or basal side of the spinal chord and therefore lose all the lower motor neurons
What is the venous drainage of the CNS
drainage happens through the superior sagittal sinus, cavernous sinus, and great vein of the Galen
What is the capillary density in the brain
Brain has very high capillary density each neuron is less than 100µm away from each other
What are potential problems with aneurysm
2 types 1 as it enlarges it compress adjacent brain tissue and 2 it can rupture and cause a subarachnoid hemorrhage
What is the path that ant. cerebral takes along the brain
it appears at the subarachnoid space and anterior to the hypothalamus then upward and around the genu of corpus collosum while giving brr it extends caudally along the body of corpus collosum and overlaps with the post. Cerebral
What areas of the brain are supplied by the post cereberal a.
occipital lobe and visual cortex and inferior and the medial temporal lobe
What does each supply and what happens if they are occludes
Sup does superior part of the lateral surface of the brain, speech and Inf inferior part of the lateral surface of the brain,
What happens if there is a stroke in the middle stem of the MCA
It MCA stem Is knocked out, then the blood won’t flow to the brr. of MCA→ to all area dying where the blood goes, so we would lose the upper motor neuron and b/c lentriculostriate aa. Wont supply internal capsule and no supply to the lateral side of the brain and there would be speech problems
What if there was a stroke in the left MCA superior division
would have weakness on the right side
What happens if there is a right stem infarct**
Everything on the left side will be knocked out
What is the main problem associated with posterior cerebral a. infarct
The blood supply to the visual cortex would be knocked out this loss of sight would be contra lateral i.e. stroke in left= vision loss in right eye
What would happen if there was an infarct in the Internal carotid
It would significantly lower the amount of blood going to the ACA and MCA and further away we get from these vessels i.e. distal brr. of these vessels will have even lower blood supply
What is the venous drainage of the CNS
drainage happens through the superior sagittal sinus, cavernous sinus, and great vein of the Galen and finally it ultimately dumps into internal jugular vein
What if there was a stroke in the left MCA superior division
would have weakness on the right side
What if there was a stroke in the left MCA superior division
would have weakness on the right side
What if there was a stroke in the left MCA superior division
would have weakness on the right side
right arm and face, loss of the Broca’s area, causing broca’s aphasia, also some sensory loss of the right side