test 1: lab 1 Flashcards
three meninges
dura mater
arachnoid
pia mater
what is in subarchnoid space
vessels and CSF
two layers of dura mater
periosteal layer
meningeal layer
superior sagittal sinus in a ___ in the dura mater
opening in the dura mater
periosteal layer and meningeal layer seperate
___ is an extension of the dura mater into the sagittal fissure
falx cerebri
subarachnoid cistern
where the arachnoid and pia are widely separated
the cisterna magna (cerebellomedullary cistern) is where they are most widely separated
brain receives blood from two sources
internal carotid artery
basilar artery
rete mirabile
(arterioles)
sit in the cavernous sinus
counter-current heart exchange between blood in rete and bool venous blood
protects brain from overheating
counter-current heart exchange in the brain is by
rete mirabile
____ are CSF filled caverns and canals inside the brain
ventricles
where is CSF produced?
in the choroid plexus in the ventricles
why have CSF?
protects brain – cushions it
Removes harmful metabolites
Conduit for hypothalamic peptide hormones
flow of CSF
lateral ventricles
interventricular foramen → foramen of monro
3rd ventricle
cerebral aqueduct of sylvius
4th ventricle
lateral recess → brain medial recess →spinal cord
subarachnoid space
arachnoid granulations
venous sinus
CSF is reabsorbed in ___ and granulations into venous
sinuses
arachnoid villi
what cells produce CSF
specialized ependymal cells surrounding capillaries in ventricles
which ventricle is associated with the telencephalon
lateral
which ventricle is associated with the diencephalon
which ventricular space is associated with the mesencephalon?
which ventricle is associated with the metencephalon
fourth
which ventricle is associated with the myelencephalon?
central canal is associated with the ___
spinal cord
2 layer of meninges
arachnoid
where CSF is reabsorbed into the venous system, in the dorsal sagittal sinus
arachnoid villi
arachnoid villi
where CSF is reabsorbed into the venous system, in the dorsal sagittal sinus
basilar artery
formed by the joining of the vertebral arteries- runs along the midline of the ventral surface of the medulla and pons and then joins the circle of willis
basilar artery: formed by the joining of the vertebral arteries- runs along the midline of the ventral surface of the medulla and pons and then joins the circle of willis
carotid rete (rete mirabile)
specialized structure for heat exchange, within the cavernous sinus, the many parallel arteroles proved a high surface area for heat exchange, the faster the respiratory rate the cooler the venous blood becomes, then form into the internal carotid artery and enter the circle of willis
caudal cerebellar artery- supplies the caudal portion of the cerebellum
caudal cerebral artery- comes form the caudal communicating artery at the level of the caudal aspect of the pituitary. supplies the medial part of the caudal half of the cerebral hemisphere, it also supplies the diencephalon and rostral mesencephalon
what artery supplies the black?
caudal cerebral artery
caudal communicating arteries
cavernous sinus
floor of the middle cranial fossa, where pituitary would be- where rete mirabile would be
cerebral aqueduct - connects 3rd to 4th ventricle, found in the mesencephalon
cerebral aqueduct - connects the 3rd and 4th ventricle- found in the mesencephalon
circle of willis
cerebral arterial circle
___ make CSF and are found ___
choroid plexus
in the lateral, 3rd and 4th ventricles
cisterna magna (cerebellomedullary cistern) - large expansion of the subarachnoid space above the 4th ventricle, common site for CSF tap.CSF from the 4th ventricles flows through the lateral apertures of the 4th ventricle to get to the cisterna magna
cisterna magna
cisterna magna (cerebellomedullary cistern) - large expansion of the subarachnoid space above the 4th ventricle, common site for CSF tap.CSF from the 4th ventricles flows through the lateral apertures of the 4th ventricle to get to the cisterna magna
dorsal sagittal sinus - contains arachnoid villi that absorb CSF, runs within the falx cerebri and supplies blood to the transverse sinus
outer most layer of the meninges
dura mater
ependyma
cells that line the ventricles- some will specialize into CSF producing cells- choroid plexus
___ are cells that line the ventricles
ependyma
___ is an extension of the dura matter down into the sagittal fissure(longitudinal fissure), where the dorsal sagittal sinus is
falx cerebri
4th ventricle in the hindbrain
fourth ventricle in the hindbrain
internal carotid artery
___ connects the lateral and 3rd ventricle
interventricular foramen
lateral aperture of fourth ventricle- extension of the 4th ventricle that leads into the cisterna magna and allows CSF around the brain in the subarachnoid space
lateral ventricles [LV]- within the telencephalon
pia mater and arachnoid =
leptomeninges
midline fissure is the ___
longitudinal fissure
(sagittal fissure)
three layers of meninges
dura mater
arachnoid
pia mater
middle cerebral artery- supplies most of the cerebrum
what supplies orange?
middle cerebral artery
optic chiasm- where CN2 cross
inner most layer of meninges that extend into the sulci
pia mater
rostral cerebellar artery- supplies the caudal midbrain and the rostral half of the cerebellum
rostral cerebral artery- comes off the circle of willis and up through the longitudinal fissure to supply blood to the medial portion of the rostral half of the cerebrum
what supplies the green area
rostral cerebral artery
subarachnoid space
space between the pia mater and the arachnoid that is filled with CSF and vessels
3rd ventricle - in the diencephalon
red?
transverse sinus- carry venous blood from the dorsal sagittal sinus to the cavernous sinus
ventral spinal artery- receives blood from the vertebral arteries that enter the spinal canal through successive vertebral foramina
carry blood to the ventral spinal artery and up to the basilar artery to the circle of willis
vertebral arteries
pituitary
basilar artery
carotid rete
middle cerebral artery
3rd ventricle
