Shared Flashcard Set

Details

Bales
Ventricles
39
Anatomy
Professional
03/04/2011

Additional Anatomy Flashcards

 


 

Cards

Term
Describe the formation and tx of hydrocephalus
Definition
communicating (4th ventricle foramine, arachnoid granulations, or subaracnoid space obstruction -- not reabsorped) or non-communicating (in which there is an obstruction and only CSF accumulation upstream of that blockage); tx: shunt to drain CSF into peritoneal cavity
Term
Easy qu: name the ventricles
Definition
two lateral ventricles, 3rd ventricle and 4th ventricle
Term
Superiorly what forms the 3rd ventricle walls? inferiorly?
Definition
thalamus-sup
hypothalamus-inf
Term
What does the interventricular foramen connect?
Definition
lateral to third vnetricles.
Term
What type of cell lines the ventricles
Definition
simple cuboid epithelium
Term
Where is CSF produced
Definition
choroid plexus
Term
What makes up a typical CNS BBB capillary?
Definition
endothelium with tight jxs + astrocytes
Term
How much CSF is turned over and how oftern/day
Definition
150 ml 3 x day
Term
What are the indications for a subarachnoid hemorrhage?
Definition
Think anatomically->blood will be in the sulci
Term
Name and explain the 3 types of intracranial hemoorhages
Definition
epidural hematoma - form middle menigeal a w/ a lens shape
subdural hematoma-bridging vv with low pressure-does not cross falx or fill sulci-will be thin and longitudinal
subarcachnoid hemotthage- cerebral aa-does not cross falx, but follows sulci
Term
Name the cisterns and where they are
Definition
superior(quadrigeminal) cistern
cerebellomedullary cistern(cistern magna)
interpeduncular cistern
ambient cistern
pontine cistern-gets lateral luschke CSF-pons and medulla
Term
What nerve passes through the interpeduncular cistern
Definition
CN III
Term
Describe the noncommunicating hydrocephalus
Definition
eg. cerebral ventricle gets clogged->b/c of pridcution upstream leads to increase pressure upstream-> lateral and 3rd ventricles
Term
what makes up the floor of the temporal horn?
Definition
the floor of the temporal horn is the hippocampal formation
Term
what is the roof of the lateral ventricles?
Definition
corpus callosum
Term
what is the mass that traverse the third ventricle
Definition
massa intermedia
Term
what is the floor of the fourth ventricle?
Definition
rhomboid fossa
Term
what makes up the roof of the fourth ventricle?
Definition
superior and inferior vela, connection of the cerebellum to the brainstem
Term
what membrane covers choroid plexus capillaries
Definition
pia mater
Term
is there choroid plexus in the anterior horn?
Definition
no
Term
is the choroid of the fourth ventricle associated with the inferior or superior medullary velum
Definition
inferior
Term
what two anatomical features characterize the blood brain barrier?
Definition
tight junctions between endothelial cells and astrocyte feet
Term
what tissue below the posterior commissure has fenestrated capillaries but is not choroid?
Definition
the subcommissural organ (SCO), below the posterior commissure, has fenestrated capillaries and also secretes into the CSF
Term
what three circumventricular organs monitor Blood constituents?
Definition
subfornical organ
area postrema of the 4th ventricle
organum vasculosum of lamina terminalis (embedded in LT)
Term
what organs in the brain are fenestrated to allow neurosecretory products into the blood stream?
Definition
median eminence (floor of hypothalamus)
pituitary gland
pineal gland
subcommisural organ
Term
when two meningeal dura layers join what do they form?
Definition
falx cerebri, falx cerebelli, & tentorium cerebelli)
Term
what kind of hemorrhage occurs when the integrity of the middle meningeal artery is disrupted?
Definition
epidural hemorrhage
Term
head trauma often shears cerebral bridging veins, what kind of hemorrhage does this lead to?
Definition
subdural hemorrhage, can not cross the falx cerebri
Term
rupture of arterial aneurysms often cause what kind of hemorrage? where does this blood go? what is a complication of this type of hemorrhage?
Definition
subarachnoid
into the falx
CSF flow blockage
Term
what can we observe through a special sense organ that can give us an idea of whether or not we have high CSF pressure?
Definition
the optic nerve is covered in meninges and a bulging optic disc can be seen when CSF pressure is too high
Term
where is the subarachnoid space narrowest?
Definition
above the cerebral cortices
Term
where is the subarachnoid space the largest?
Definition
the largest subarachnoid spaces are found in the regions of the base of the brain, around the brainstem, and inferior to the spinal cord; these large spaces are called cisterns
Term
ambient cistern
Definition
space where CSF flows around the lateral midbrain; interconnects the superior and interpeduncular cisterns
- the trochlear nerve (CN IV) passes through this in its course from dorsal to ventral
Term
lateral cistern
Definition
where CSF flows in the subarachnoid space in the lateral sulcus
Term
chiasmatic cistern
Definition
around the optic chiasm
Term
quadrigeminal (superior) cistern
Definition
dorsal to the midbrain
- pineal gland projects into this one
- crossed by the large great cerebral vein (of Galen)
Term
pontine cistern
Definition
pontomedullary junction; fed by foramen of Luschka
Term
interpeduncular cistern
Definition
between the cerebral peduncles; where the arachnoid crosses between the temporal lobes
- continuous anteriorly with chiasmatic cistern, posteriorly with pontine cistern
Term
Cisterna Magna
Definition
cerebellomedullary cistern; - between cerebellum and inferior medullary velum (roof of inferior half of 4th ventricle)
- receives CSF directly via the median aperture of Magendie
* CSF via the foramina of Luschka enters at the cerebellopontine angles
- continuous inferiorly through the foramen magnum with the spinal subarachnoid space
Supporting users have an ad free experience!