vascular supply and ventricles Flashcards
location of lateral ventricles
cerebral hemispheres
location of 3rd ventricle
diencephalon
location of cerebral aqueduct
midbrain
location of 4th ventricle
pons/medulla
label the ventricles of the brain
The vascular _______ in each ventricle makes CSF.
choroid plexus (specialized ependymal cells)
CSF flows through the ventricular system and into the
subarachnoid space.
CNS acts as a ______ to protect CNS from traumatic injury.
“shock absorber”
describe the movement of CSF
Made in an ongoing fasion – flows from lateral ventral, foramen of monro, through to 3rd ventricle to cerebral aqueduct to 4th, then in back of 4th ventricle it has alternative routes – down central canal of spinal cord or could exit and enter subarachnoid space
CSF exits through the _____ in the 4th ventricle into the _____ outside the brain
dorsal holes
subarachnoid space
pathway external to the brain:
CSF is reabsorbed into _______ at _____ in cranial midline into cerebal sinuses
venous blood at arachnoid granulations
Hydrocephalus
Increased CSF in ventricles and/or subarachnoid space due to blockage of CSF flow
describe this
Blockage in exits from 4th ventricle.
Hydrocephalus of all ventricles
involved in motor aspect of speech
broca’s area
involved in receptive/comprehending aspects of language
Wernicke’s area
brain ____ form the blood brain barrier
capillaries
Arteries and veins on the surface of the brain are in the
subarachnoid space
branches off the internal carotid
- Anterior cerebral (ACA)
- Anterior communicating
- Middle Cerebral (MCA)
- Posterior communicating
branches off the vertebral artery
Posterior inferior cerebellar (PICA)
Anterior spinal (AS)
Posterior spinal (PS)
name the arteries that compose the circle of willis
Internal carotids
Anterior cerebrals
Anterior communicating
Middle cerebrals
Posterior cerebrals
Posterior communicatings
_____ supplies blood to the cerebral hemispheres
circle of willis
The circle of willis surrounds the ______ (part of brain)
diencephalon
Lies in longitudinal fissure (between hemispheres) on medial surface of hemisphere
anterior cerebral artery
Anterior cerebral artery supplies ____ parts of the ____ and ____ lobes
medial
frontal and parietal lobes
Lies in lateral fissure
(between frontal & temporal lobes)
Middle Cerebral Artery (MCA) supplies the ____ parts of the ____, ______, and ____ lobes
lateral
frontal, parietal, temporal lobes
functions of the territory MCA supplies
- motor and sensory upper limbs and face
- brocas area for motor speech on the left
- receptive language in the Wernickes area on the left
While in lateral fissure, middle cerebral artery, sends branches into interior = ________ aka Deep penetrating arteries.
Lenticulostriate arteries
what makes up the basal ganglia
caudate
putamen
globus pallidus
Middle cerebral artery supplies the _____ and internal capsule
basal ganglia
contents of internal capsule
- Descending motor tract
- Ascending somatosensory tract
the posterior cerebral artery supplies the ____ and ____ loves
occipital and part of the temporal lobe
posterior cerebray artery supplies vasculature to this function of territory
vision
Watershed areas
those that get the least blood flow during times of low blood pressure.
To understand strokes clinically we need to know:
- each brain blood vessel
- the area of brain it supplies (its territory)
- the function(s) of the region it supplies
