Tutorial 7: Visual System Flashcards
Lissauer Syndrome
can’t ID the objects but can ID by touching
Balint Holmes Syndrome
can’t reach the visual target but can button shirts
Riddoch Syndrome
excellent basic motion perception but can’t identify object that patient may collide with (shape & color)
Prosopagnosia
the inability to recognize faces
What is the function of V1 in temporal lobe?
object recognition
What is the function of V1 in parietal lobe?
spatial & motion of objects
What determine the pattern/direction of motion of objects?
relative motion btw observer & environment (self-motion & object motion)
optic flow
the pattern of apparent motions of objects, surfaces, and edges in visual scene
What will help navigating when optic flow not available or perception impaired?
landmarks
parahippocampus gyrus
Is it T/F that parahippocampus gyrus activated when there is optic flow?
False
only when optic flow not available -> parahippocampus activated
Is it T/F that in normal brain, landmarks & optic flow activates the same region in brain during navigation?
True
What are 2 theories that support adult brain plasticity?
Which theory is not true?
Contralesional hemisphere takes over (Not true)
damaged hemisphere reorganizes
What will happen to damaged visual area of the brain to gain its function again?
the functional stealing from nearby areas to compensate motion deficits
What is the plasticity of sensory routines?
what is the example of this?
the exploiting computational redundancy of brain
patient who uses landmarks instead of optical flow
plasticity of sensory maps
the topographic reorganization of cortical areas around the lesion
