Flashcards in Vesicles to Ventricles: Blood Supply and CSF Deck (24):
CSF is made by the _____________.
How much CSF is in the brain and spinal cord?
What does CSF pass through to get out of the CNS?
How much CSF is made daily?
__________ cells lack glycogen.
The anterior circulation arises from the __________.
The posterior circulation arises from the __________.
What are the only two areas of the cerebrum that are supplied by the vertebral arteries?
The medial part of the occipital lobe and the interior part of the temporal lobe
The vertebral arteries supply the _________.
cerebellum and brainstem (as well as the parts of the cortex mentioned in another card)
The anterior cerebral artery supplies the _____________.
medial half of the anterior 2/3 of the cerebrum
The middle cerebral artery supplies the ____________.
lateral half of the anterior 2/3 of the cerebrum
The __________ artery gives off many small branches that supply the deeper portions of the brain.
List the blood flow from the vertebral artery through its branches.
Heart -> aortic arch -> subclavian -> vertebral -> spinal arteries -> PICA -> AICA -> basilar -> superior cerebellar -> posterior cerebral -> posterior communicating -> middle cerebral -> internal carotid -> anterior cerebral
The inferior sagittal sinus drains to the _________.
Blood flows from the sinus confluens to the internal jugular via the _____________.
transverse sinus and then sigmoid sinus
The pia mater is ___________ cell(s) thick.
The lateral ventricles communicate with the third ventricles through the _____________.
The ___________ connects the third ventricles to the fourth ventricles.
How many apertures connect the fourth ventricles to the subarachnoid space?
Three (two lateral and one caudal)
CSF in the ventricles freely mingles with the cerebral extracellular space through the _________, a single layer of cells that lines the ventricles.
Explain the unique tight-junction setup in the choroid plexus.
The brain capillaries lose their tight junctions and the ependymal cells gain tight junctions so that plasma can leaks out of the capillaries, but it must still be pumped actively into the ventricles.
Differentiate communicating and non-communicating hydrocephalus.
Non-communicating hydrocephalus results from blockages in inter-ventricular foramen or the cerebral aqueduct, while communicating hydrocephalus results from failure of CSF to resorb through the arachnoid granulations to the superficial cerebral veins.
Between what two layers do the superficial cerebral veins lie?
The pia and arachnoid