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investigation of sensory system (1).docx

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Department
Psychology
Course
PSYCH 2E03
Professor
Gautam Ullal
Semester
Fall

Description
September 19 , 2012 Psych 2E03: Sensory Processes Investigation of Sensory System (1) Inattention and Neglect - Distribution of attention:  dog on the right  rabbit on the left  right side of the body gets attention from both right as well as left parietal lobes  but left side of body only gets attention from the right parietal lobe, powerful input  thus, lesion of right parietal lobe leads to neglect of the left side  lesion of left parietal lobe seldom causes neglect of right side because the right parietal lobe is intact  attention is a different process than sensation: sensation right to left and left to right - actors often make their hidden entry or exit from the right side of the audience; why?  Normally we are right brain dominant for spatial attention (attend to left space)  Pseudo-neglect for the right side: tend to ignore the right side compared to the left - which of the bars seems darker and why  most people will say that it is darker if the left side is darker  pay more attention to the left side therefore darker band then the one on top  however they are both the same  perhaps an advantage to have the oncoming traffic on your left side Attentional Failure and Simultanagnosia - cannot grasp the whole scene - either fixes to one component of the scene - or cannot bind several components together - binding failure and simultanagnosia: unable to recognize when things are coming together - cause of significant binding failure: bilateral, both to the left and right, lesion of parietal lobe (Balint’s syndrome) Eye movement and selective attention - eye movement are very important for selective attention and perception - saccades: swift, jerky scanning movements - example-reading, viewing a room, viewing a picture - inprosopagnosia, saccades while viewing a face are defective - saccades are also defective in Balint’s syndrome - autism, psychzophrenia Eye movements while observing objects Attention and eye-gaze processing in autism - normal and autistic individuals viewed an animation with eyes looking
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