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20 Cards in this Set
- Front
- Back
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what is the main function of the parietal lobe?
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process sensory information from the body and spatial recognition
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Lesions to the parietal lobe will generally cause what 3 things?
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agraphesthesia
astereognosis sensory extinction |
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what is the main function of the right parietal lobe?
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to direct our attention to the surrounding world
gives us a sense of direction and a sense of place in space |
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in general what will right parietal lobe lesions manifest as?
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visual spatial disorders
lack of self-awareness visual field defects hemi-neglect |
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what is the main function of the left parietal lobe?
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reading and writing (symbolic representation of language)
this occurs specifically in the angular gyrus of the left parietal lobe |
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what is alexia without agraphia or pure word blindness? what causes it?
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person cannot read but they can write
this is due to a lesion of the angular gyrus |
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what is gerstmann sydrome? what causes it?
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classic tetrad
- dysgraphia - dyscalculia - right/left confusion -finger agnosia (inability to describe which finger is which) caused by a lesion to the left parietal lobe |
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what is Balint syndrome? what causes it?
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classic triad
- simultagnosia - optic ataxia - ocular apraxia caused by lesion to the bilateral dorsolateral parieto-occipital association cortex |
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what is simultanosia?
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the inability to perceive parts of a visual scene as a whole
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what is optic ataxia?
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inability to reach for or point to objects in space under visual guidance
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what is ocular apraxia?
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difficulty looking left or right without moving their head
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what is the main function of the occipital cortex?
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vision
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what is the function of the primary visual cortex?
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create edges and pick up motion
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what is the function of the secondary visual cortex?
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color and depth perception
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what is achromatopsia? what causes it?
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lack of color vision
caused by bilateral lesions of the lingual and fusiform gyri usually due to strokes |
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what is visual agnosia? what causes it?
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inability to recognize or identify objects visually despite intact vision
caused by diffuse unilateral or bilateral occipital lobe damage |
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what is prosopangnosia? what causes it?
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impaired ability to recognize familiar faces and learn new faces
caused by bilateral lesions to the fusiform gyrus |
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Lesion to the occipital-parietal connections will cause what 3 things?
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akinetopsia - motion blindness
asteropsis - impaired depth perception hemineglect |
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what is Anton's syndrome? what is its cause?
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denial of blindness. person is blind but they do not realize it because they forgot what vision was in the first place
caused by bilateral occipital lobe lesions |
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what is alice in wonderland syndrome? what causes it?
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when objects appear larger or smaller than they really are (macropsia/micropsia)
caused by bilateral occipital lobe lesions |
