Neuro: Blood Supply And Case Flashcards
hemorrhage stroke is bleeding within the ___ or in ____ ____
Brain or in the subarachnoid space
Hemorrhage strokes are acute and usually involve an injury? T or F
False, they are spontaneous
Spontaneous hemorrhagic strokes can result from: 5 points
-uncontrolled hypertension
-cerebral amyloid angioplathy
-rupture of a saccular(berry) aneurysm
-arteriovenous malformations (AVM)
-transformation of ischemic stroke
A hemorrhage can lead to a _______
Hematoma
What are the two types of hematomas?
- Epidural (extradural)
- Subdural
What layers do epidural hematoma occur between?
Blood between the skull and dura mater
What layers do subdural hematomas occur between?
Between dura mater and arachnoid mater
Hematomas are usually ___ and involve ____
Acute, injury
Hematomas can lead to increase _________ _______
Intercranial pressue
Ischemia is
Insufficient blood flow that leads to cell death
What are the two major systems of vascular supply to the brain?
Internal carotid artery and vertebral artery (vertebrobasilar)
The ICA supply ____ circulation to the brain
Anterior
The ICA supply structures that are ____tentorial
Supratentorial
What is the acronym for the ICA branches that supply the brain and what do the letters stand for?
O-ophthalmic artery **
P-posterior communicating artery
A-anterior choroidal artery
A- anterior cerebral artery
M- middle cerebral artery *- most off. In stroke
What are the two parts of the ICA system for the brain
OPAAM and circle of Willis
What are the arteries involved in the circle of Willis
-anterior communicating
-anterior cerebral arteries
-part of internal carotid arteries
- posterior communicating arteries
-part of posterior cerebral arteries
-basilar artery*
The vertebral artery provides the ____ circulation of the brain
Posterior
The vertebral artery supplies the ____tentorial structures
Infratentorial
What are the branches of the vertebrobasilar brain supply
-vertebral artery
-posterior inferior cerebellar artery
-basilar artery
-pontine artery
-anterior inferior cerebellar artery (AICA)
-Labyrinthine artery
-superior cerebellar artery(SCA)
-posterior cerebral artery
Which branch in the vertebrobasilar artery is supratentorial instead of infratentorial
The posterior cerebral artery
At the vertebral level what arteries supply the spinal cord?
Anterior and posterior spinal arteries
What is the typical sequence of sinuses starting from the superior sagittal sinus?
Superior sagittal sinus -> confluence of sinuses-> transverse-> sigmoid-> jugular
Which sinuses go through the tentorium?
Confluence of sinuses and transverse
Which sinus(es) goes through the falx cerebri?
Superior sagittal sinus
Cerebral venous sinus thrombosis is a type of stroke involving …
The sinus system due to clot formation
Cerebral venous sinus thrombosis (CVST) prevents drainage that causes the..
Breakdown of the BBB that can cause hemorrhage, ischemia, vasogenic edema, and cytotoxic edema
What nerves does the walls of the cavernous sinus contain?
V1
V2
IV
III
VI
Postganglionic sympathetic fibers from superior cervical ganglion
