PSYC 2220 Chapter Notes - Chapter 3: Ommatidium, Receptive Field, Sensory Neuroscience
22 Oct 2017
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Perception can be affected by neural convergence - more convergence (rods) results in greater sensitivity, and less convergence (cones) is associated with better detail vision. The limulus was chosen because the structure of its eye makes it possible to stimulate individual receptors. The limulus eye is made up one 100s of tiny structures called ommatidia, and each ommatidium has a small lens on the eye"s surface that is located directly over a single receptor. One of the goals of perception research is to demonstrate links between neural activity and perception. Fibers - are the axons of the retinal ganglion cells. Region of the retina that must receive illumination in order to obtain a response in any given fiber . In contrast, stimulation of the surround causes a decreases in firing, so it is called the inhibitory area of the receptive field. This receptive field is called excitatory-center, inhibitory surround receptive field.
