sensation and perception book notes
sensation and perception book notes psych 303
Cal State Fullerton
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This 2 page Class Notes was uploaded by Michelle Ibrahim on Saturday February 27, 2016. The Class Notes belongs to psych 303 at California State University - Fullerton taught by James Neuse in Winter 2016. Since its upload, it has received 29 views. For similar materials see Sensation and Perception in Psychlogy at California State University - Fullerton.
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Date Created: 02/27/16
Ch 4 02/16/2016 ▯ An Exploration of Spatial Organization Magnification factor o When you look at a scene the area you are looking at takes up more space in your cortex than something of the same size of to the side, things in our direct vision take up more space in our visual cortex More space on the cortex translated into better detail vision rather than larger size Huble and Wiesel discovered that the striate cortex is organized in columns that are perpendicular to the surface of the cortex, so that all of the neurons within a location column have their receptive fields at the same location on the retina A location column which contains the full range of orientation columns (hyper column) ▯ Streams: Pathways for What, where and how Streams transmit information from the striate cortex to other areas in the brain Object discrimination- ex picking the correct shape when presented with an object, lesioning (ablation) in the temporal lobe makes this task difficult Landmark discrimination- pick the object that is closest to a diferent object, lesioning (ablation) of the parietal lobe makes choosing difficult Pathway that leads to Temporal lobe is where object’s identifies are determined, otherwise known as the “what pathway” are called the ventral pathways o ex. Length estimation Pathway that leads to the Pariental lobe is where we determine an objects location, otherwise known as the “where pathway” are called the dorsal pathways or action pathways o Ex. Grasping task The cortical ventral and the dorsal streams can be traced down back to the retina and LGN Steams for information about what and how dorsal stem is ther where but it does not just indicate where an object is, it is also for taking action such as picking up on object dorsal stem also directs information on how to take action Where vision meets memory Medial temporal lobe (MTL)- consists of the parahippocampal place area (PPA), entorhinal cortex, hippocampus ▯ Key Terms: Spatial organization- refers to the way stimuli at specific locations in the environment are represented by activity at specific locations in the nervous system Retinotopic map- electronic map of the retina on the cortex, shows which parts of the retina corresponds to the firing of the signals in the striate cortex Cortical magnification- apportioning to the small fovea of a large area on the cortex Brian imaging- refers to the number of techniques that result In images that show which areas of the brain are active PET scan- measures the volume of blood flow, so when there are parts of the brain that are active they require more fuel meaning more blood, this is how activity is measured fMRI- similar to PET and measuring blood flow, this indicates the presences of activity in the brain tiling- columns that cover the entire visual field ablation- the destruction or removal of tissue in the nervous system neuropsychology- studies the behavioral efects of brain damage in humans module- a structure that is specialized to process information about a particular type of stimulus fusiform face area (FFA)- located in the fusiform gyris on the underside of the brain directly below the IT cortex Parahippocampal place area (PPA)- activated by pictures depicting indoor and outdoor scenes, what is important to this area is information about spatial layout Extrastriate body area (EBA)- is activated by pictures of bodies and parts of the body but not by faces Hippocampus- crutial for the formation of long term memories, not responsible for recognizing objects ▯ ▯
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