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18 Cards in this Set
- Front
- Back
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what are the two types of synapses neuron can have
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electrical/ chemical
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t or f all cells in the retina preoduce an action potential
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false- some produce graded portentials
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what type of cells are in layers 1,2 of LGN? in 3-6?
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LGN 1-2: magnocellular
LGN 3-6: parvocellular |
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which layers of LGN cross at optic chiasm
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1,4,6 cross river stix (are contralateral)
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what is the colliculus involved in?
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information related to eye movement
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what sends output to the vesibular nuclei and the cerebellum?
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accessory optic system
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how many pairs of nuclei does the accessory optic system have?
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3
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what nucleus is associated with the biological clock
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suprachiasmatic nucleus
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what nucleus projects to Edinger -Westphal and is involved in eye movement controls
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pretectal nuclei
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what is a scotoma
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describes how destruction of particula part of LGN produces corresponding blindness in visual field.
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what nuclei is associated with coordination of head/ eye movements
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accessory optic nuclei
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what is teh gasserian ganglion
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collection of cell bodies from the trigeminal nerve (CNV) outside of brainstem
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what are the three major branches of V1 (opthalmic division of trigeminal(CNV))
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1. nasociliary
2 frontal 3 lacrimal |
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what nerve has nociceptors activated by noxious stimuli (ex pressure, inflamatory signals)
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long ciliary nerves that run into the nasociliary fiber
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what is a retrobulbar block
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injection of anesthesia behind eye
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what nerve sends info from lacrimal sac, medial canthus, plica semi lun, caruncle
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infratrochlear
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what is the cavernous sinus
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large venous sinus that all oculomotor nerves pass through on way to orbit.
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what does trochlear nerve (CNIV) control
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superior oblique
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