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29 Cards in this Set
- Front
- Back
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What happens to an object when it is projected onto the retina?
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Is projected upside down and flipped
(rotates 180 degrees) |
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The left visual field goes where in the brain?
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RIGHT side
Vision switches sides!! |
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The temporal part of the retina has what field of view?
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Nasal
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Which fibers cross in the optic chiasm?
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NASAL fibers (carrying temporal side of field of view, therefore MUST cross)
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What is the connection between the optic tract/LGN and the striate (V1) cortex called?
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Optic Radiations
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Inferior part of the optic radiation is called what?
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Meyers loop
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The inferior part of the RETINA (superior visual field) courses where?
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INFERIORLY (meyers loop)
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The superior part of the RETINA (inferior visual field) courses where?
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SUPERIORLY (parietal optic radiation)
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Predict effects of lesions seen on 3K-10
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See 3K-10
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A patient presents with Left eye superior altitudinal field defect (superior portion of Left VF gone), what do the most likely ahve?
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LEFT inferior branchI retinal artery occlusion
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A patient who has an eye tumor in Right ocular space will present with what?
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Complete loss of light perception (blindness) in RIGHT eye
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A patient presents with Bitemportal hemianopsia, what do they have?
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Pituitary Ademoma - compresses optic chiasm and NASAL fibers that cross which carry temporal VF info
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A patient presents with Left homonymous hemianopia (left VF gone in both eyes). What do they have?
right = temporal left = nasal |
Brain tumor compressing Right Optic Radiations (right parietal is lesioned)
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A patient has section of temporal lobe removed due to epilepsy, what is a common side effect?
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Left Homonymous Quadrantanopsia
(Upper left quadrant gone in each eye) |
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What gives R Homonymous Hemianopsia with macular sparing?
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Left posterior cerebral artery stroke
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Entire right occiptal lobe is destroyed due to a gunshot wound, what does the patient present with?
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Left homonymous hemianopsia
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A bilateral occipital lobe stroke produces what?
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Complete cortical (neuronal cause) blindness
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What is alexia?
Agraphia? |
Inability to read
Inability to write |
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A patient presents with Alexia without agraphia
Right homonymous hemianopsia What do they have? |
Lesion of occipital lobe and left splenium of Corpus collosum
CC lesion explains alexia |
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A patient presents with agnosia and prosopagnosia, where is there lesion?
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Occipital-temporal (ventral pathways - what)
Often bilateral |
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What is the most important area that deals with facial recognition?
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Fusiform face area
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A patient has a lesion in the fusiform (and lingual gyri) in the inferior occipital lobe (V4), what do they present with?
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Cerebral Hemi-achromatopsia
Lack of color vision in homonymous hemifield Upper quadrantanopsia |
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A patient presents with neglect, can't attend to object in LEFT hemisphere.
Where is their lesion? |
Right parietal lobe (dorsal pathway)
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What is simultanagnosia?
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Inability to see all elements of a scene at once
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What is ocular apraxia?
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Inability to execute/respond to a command
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What is optic ataxia?
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Inability to recall under visual guidance
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A patient presents with
-Simultanagnosia - Ocular apraxia - Optic Ataxia What do they have? |
Balints Syndrome (can see in alzheimers)
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Where does balints syndrome localize?
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Bilateral perieto-occipital
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A lesion of V5 (MT) in the lateral occipito-temporal will produce what symptoms?
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Akinetopsia (inability to percieve motion)
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