Shared Flashcard Set

Details

Ocular Physio
N/A
15
Other
Graduate
01/22/2012

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Cards

Term
what is the purpose of the internal pacemaker cells in a vessel?
Definition
constriction of blood vessels in a localized myogenic response
Term
what is the largest artery in the orbit
Definition
infraorbital artery
Term
what is the disadvantage of being a terminal artery
Definition
common site of embolism, no collaterals
Term
Does the vagal nerve act parasympathetically or sympathetically
Definition
PS
Term
what are the four factors that cause vasodilation
Definition
increased pCO2, decreased pO2, increased K, increased H
Term
What do ocular pericytes do
Definition
restrict blood flow
Term
why do you have a cherry red spot in the macula in a CRAO
Definition
dual blood supply to the macula
Term
how is color perceived
Definition
based on the amino acids around the 11-cis retinal
Term
where is all trans retinal reduced to all trans retinol
Definition
RPE
Term
is the blue cone bipolar on or off center?
Definition
on-center only
Term
midget bipolar cells only collect information from what cells
Definition
red and green cones
Term
what does the corticobulbar tract contol
Definition
speech and swallowing
Term
does the pyramidal pathway innervate cranial nerves bilaterally or unilaterally
Definition
bilateral
Term
spinothalamic tract decussates where?
Definition
anterior white commissure in spinal cord
Term
where does the trigeminothalamic path go
Definition
VPM
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