L4 Effects of parietal damage

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Degree Attention Flashcards on L4 Effects of parietal damage, created by lenniciah on 02/05/2015.
lenniciah
Flashcards by lenniciah, updated more than 1 year ago
lenniciah
Created by lenniciah over 9 years ago
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Question Answer
Neglect is syndrome that results from damage to the? Right parietal cortex
Define 'Neglect'... A neurological syndrome (often involving damage to the right parietal cortex) in which patients show a marked deficit in the ability to detect or respond to stimuli in the contralesional side of space
Neglect is a result of _____ parietal damage where as Balints' syndrome is a result of _____ parietal damage Unilateral, bilateral
Name some common neuropsych assessments for Neglect Line bisection, cancellation tasks
Neglect can affect different reference forms, what are these? Personal space -> shaving, combing hair Peri-personal space -> near space, eating only have of food on a plate Allocentric -> centers on the object, only half of an object is seen
Who developed the peripheral cueing paradigm? Posner, 1980
In the peripheral cueing paradigm, what problem do Neglect patients have? Issue of disengaging attention away from the ipsilesional side to the contralesional side. Seen when a cue points to the (right) good side but the target appears on the left
As Neglect is dynamic, what stages of Neglect can occur? Acute stage - soon after injury, worse performance on tasks Chronic stage - deficits are reduced
In terms of brain imaging what evidence has been found in terms of activation and different reference forms? Chechlacz et al., (2010) found that there was a differentiation between allocentric and egocentric neglect specifically in right temporal regions but an overlap in the TPJ (circuit breaker)
What is extinction? A phenomenon where patients detect a single stimulus presented to one visual field (typically left) but fail to detect the same stimuli when another stimulus is presented simultaneously
Who found that left parietal patients have reduced saliency suppression? Mevorach et al., (2009a)
If left parietal patients have larger RT's detecting global information when local information is salient than controls this suggests? Left parietal patients have a deficit in being able to ignore salient distractors
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