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What are phosphenes?
bright flashes of light with eye movement/dark settings found in Optic neuritis
What are photisms?
sensations of light/color associated with noise, touch, taste, or smell
Which lobe gives formed hallucinations?
Which lobe gives unformed hallucinations?
Which lobe produces olfactory/gustatory hallucinations?
Which lobe produces unformed and formed hallucinations?
What are afterimages after removal of original stimulus called?
What is Charles Bonnet syndrome?
Bilateral vision loss with visual hallucinations. Pt is aware that these are not real.
Inablity to recognize objects
Location of lesion?
- occipital lobe/temporal interruption affecting inferior longitudinal fasiculi
What is the inability to recognize familiar faces
Location of the lesion
- bilateral occipital lobe damage/ right inferior occipital lobe
loss perception of visual motion
Loss of information b/w occipital lobe and angular gyrus of parietal lobe via splenum of the corpus callosum causes what?
lesion at angular gyrus
- Alexia without agraphia
- Alexia with agraphia
What is the loss of color discrimination?
location of the lesion
- cerebral achromatopsia
- bilateral parietal or occipital lesions
What is optic ataxia?
person reaches for object as if they were blind
What is Allesthesia?
things looked inverted/flipped or rotated
What is Anton syndrome?
cortical blindness but denies blindness
What is Riddoch Phenomenon?
motion of perception in a blind hemifield