PSY280H1 Lecture Notes - Lecture 3: Parietal Lobe, Retinal Ganglion Cell, Extrastriate Cortex
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Receptive field: change in membrane potential is captured by electrode, when light is shining on a point of a neurons receptive field it will detect it and its frequency of ap will drastically. Spontaneous firing: is ap discharge in absence of stimulus increase. where dorsal pathway: concerned with locations of objects or actions required to interact with them: go to parietal lobe. What an where pathways: extrastriate cells have more complex receptive fields than striate cortex, respond to visual properties important for perceiving objects (e. g. boundary ownership) Figure-ground organization: which regions are figure and which regions are ground. Illusory contour: a contour that is perceived even though nothing changes from one side of contour to the other: this is one way our visual system make inferences. Perceptual committees decide on consensus perception when different rules conflict: explains why we see illusory contours. Similarity: similar looking items tend to group (e. g. colour, size, orientation, form)
