PSY318H5 Lecture Notes - Hebbian Theory, Parallel Computing, Stereopsis
Document Summary
Second level divided into 2 parts, one is middle of parietal lobe and one in lower part of temporal lobe. Knowledge of early stages of visual analysis comes from investigations of activity of individual neurons in thalamus and primary visual cortex. 2,500 blocks of tissue . 5x. 7 mm in size containing 15,000 neurons each, receiving information from same small region of retina, and thus small region of visual field (amount seen through soda straw) Particular neuron responds to particular orientation (50 degrees, etc) Visual association cortex first level of visual association cortex contains several subdividions, each of which contain map of visual scene each subdivision receives information from different types of neural circuits within modules of primary visual cortex. Orientation and widths of lines and edges involved in perception o. Movement keeps track of relative movement of objects. 2 regions of association cortex put together information ghathered and processed by subdivisions of first level.
